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@ -3012,7 +3012,133 @@ The use of <strong><code>WITH</code></strong> is deprecated. While t
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&lt;/table></description></item><item><title>Docs: Title Here</title><link>https://alguidelines.dev/docs/contributing/templates/bestpractice/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://alguidelines.dev/docs/contributing/templates/bestpractice/</guid><description>
&lt;/table></description></item><item><title>Docs: Template Method Pattern</title><link>https://alguidelines.dev/docs/patterns/template-method-pattern/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://alguidelines.dev/docs/patterns/template-method-pattern/</guid><description>
&lt;p>&lt;em>Created by Patrick Schiefer, Described by Patrick Schiefer&lt;/em>&lt;/p>
&lt;h2 id="abstract">Abstract&lt;/h2>
&lt;p>The goal of this pattern is to simplify the solution of similar problems and make your code more readable.&lt;/p>
&lt;h2 id="problem">Problem&lt;/h2>
&lt;p>In nearly every app you sometimes have to solve similar problems for different cases. Mostly not the same developer will solve every case. This results in different solutions.&lt;/p>
&lt;h2 id="description">Description&lt;/h2>
&lt;p>The pattern is used when you have problems which are independent but require the same logical flow. Examples which occur very often are: &lt;em>Posting Documents&lt;/em>, &lt;em>Printing Reports&lt;/em> or &lt;em>Exporting Data&lt;/em>.&lt;/p>
&lt;h2 id="bad-code-example">Bad Code Example&lt;/h2>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">50010&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportSalesLines&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportData&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesHeader&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Record&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Header&amp;#34;&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLine&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Record&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Line&amp;#34;&lt;span style="color:#ce5c00;font-weight:bold">)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">if&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">not&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>CheckData&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>&lt;span style="color:#204a87;font-weight:bold">then&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">exit&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">repeat&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">case&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>ExportType&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">of&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>ExportType&lt;span style="color:#000;font-weight:bold">::&lt;/span>A&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>GenerateLineTypeA&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesLine&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>ExportType&lt;span style="color:#000;font-weight:bold">::&lt;/span>B&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>GenerateLineTypeB&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesLine&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">until&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLine&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>Next&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>=&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">0&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">case&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>ExportType&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">of&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>ExportType&lt;span style="color:#000;font-weight:bold">::&lt;/span>A&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>WriteToFile&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>ExportType&lt;span style="color:#000;font-weight:bold">::&lt;/span>B&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SendToWebService&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#8f5902;font-style:italic">//TODO Implementation of procedures used in example
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#8f5902;font-style:italic">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>As you can see in this example the readability gets worse with every new case.&lt;/p>
&lt;h2 id="the-pattern">The Pattern&lt;/h2>
&lt;p>To implement the Pattern you need at least 3 objects:&lt;/p>
&lt;ul>
&lt;li>A template codeunit&lt;/li>
&lt;li>An Interface which provides the needed procedures&lt;/li>
&lt;li>A codeunit which Implements the interrface&lt;/li>
&lt;/ul>
&lt;p>In my example I show how to implement a data export with templating.&lt;/p>
&lt;p>We start with the template&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">50000&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportTemplate&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportData&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>export&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Interface&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IDataExport&lt;span style="color:#ce5c00;font-weight:bold">)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">if&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">not&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>CheckData&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>&lt;span style="color:#204a87;font-weight:bold">then&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">exit&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">if&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>GetLinesToExport&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>&lt;span style="color:#204a87;font-weight:bold">then&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">repeat&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>ExportLine&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">until&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">not&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>NextLine&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>Finish&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>As you can see the template just calls procedures via an interface and just defines the flow of the export without really implementing it.&lt;/p>
&lt;p>As the second part we need an interface for the export functions&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">interface&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IDataExport&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>CheckData&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>GetLinesToExport&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportLine&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>NextLine&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>Finish&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>And now we need an implementation. For my example I wrote a export Codeunit for Sales Headers&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">50001&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeaderExport&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">implements&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IDataExport&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SetSalesHeader&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>DocType&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Document Type&amp;#34;&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>No&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Code&lt;/span>[&lt;span style="color:#0000cf;font-weight:bold">10&lt;/span>]&lt;span style="color:#ce5c00;font-weight:bold">)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>Get&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>DocType&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>No&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>CheckData&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>&lt;span style="color:#204a87;font-weight:bold">TestField&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>Status&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>&amp;#34;Sales Document Status&amp;#34;&lt;span style="color:#000;font-weight:bold">::&lt;/span>Released&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>GetLinesToExport&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLines&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>SetRange&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>&amp;#34;Document Type&amp;#34;&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>&amp;#34;Document Type&amp;#34;&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLines&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>SetRange&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>&amp;#34;Document No.&amp;#34;&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>&amp;#34;No.&amp;#34;&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">exit&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesLines&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>FindSet&lt;span style="color:#ce5c00;font-weight:bold">())&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportLine&lt;span style="color:#ce5c00;font-weight:bold">()
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#8f5902;font-style:italic">//Generate Exportdata here
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#8f5902;font-style:italic">&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>NextLine&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>Steps&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">integer&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">exit&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesLines&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>Next&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>Steps&lt;span style="color:#ce5c00;font-weight:bold">) &lt;/span>&amp;lt;&amp;gt;&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">0&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>Finish&lt;span style="color:#ce5c00;font-weight:bold">()
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#8f5902;font-style:italic">// Send or Save data here
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#8f5902;font-style:italic">&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">var&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Record&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Header&amp;#34;&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLines&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Record&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Line&amp;#34;&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Now lets have a look how to use the pattern&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">50002&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportOrders&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportOrder&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>DocType&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Document Type&amp;#34;&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>No&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Code&lt;/span>[&lt;span style="color:#0000cf;font-weight:bold">10&lt;/span>]&lt;span style="color:#ce5c00;font-weight:bold">)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">var&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportTemplate&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportImpl&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeaderExport&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportInt&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Interface&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IDataExport&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportImpl&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>SetSalesHeader&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>DocType&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>No&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportInt&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">:=&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportImpl&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>ExportData&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>exportInt&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="benefits">Benefits&lt;/h2>
&lt;p>Your code gains readability and it is very easy to add new cases for the template. You don&amp;rsquo;t always have to think about the whole logic. You just have to implement the details.&lt;/p>
&lt;h2 id="when-not-to-use">When not to use&lt;/h2>
&lt;p>The Pattern should not be used for problems which differ too much. For example, if you have two data exports in your app, one is exporting header and lines and the second one only export header. In this case I would suggest to not use the pattern or to make two templates out of it.&lt;/p>
&lt;h2 id="references">References&lt;/h2>
&lt;p>&lt;a href="https://patrickschiefer.com/2022/04/08/template-method-pattern/">Detailed Explanation of the pattern&lt;/a>&lt;/p></description></item><item><title>Docs: Title Here</title><link>https://alguidelines.dev/docs/contributing/templates/bestpractice/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://alguidelines.dev/docs/contributing/templates/bestpractice/</guid><description>
&lt;!-- This is a guideline, some parts are optional (if there's no content, remove the whole paragraph). -->
&lt;!-- The "Readability" and "Performance" tags are often used. You can, however, add multiple tags, but please do not change the Category -->
&lt;p>&lt;em>Created by &lt;!-- John Smith -->&lt;!--, Cronus International.--> Described by &lt;!-- Jane Doe-->&lt;!--, Contoso, LLC-->&lt;/em>&lt;/p>

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128
tags/interface/index.xml
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@ -75,4 +75,130 @@ When a new implementation is created, we need to make sure that these events are
&lt;p>This new codeunit, with public events, makes the events accessible from all places, including new apps that are dependent from this app.&lt;/p>
&lt;p>The naming convention (both starting with &amp;ldquo;IScale&amp;rdquo;) also makes it very easy to find that corresponding events for the interface.&lt;/p>
&lt;h2 id="when-not-to-use">When not to use&lt;/h2>
&lt;p>Obviously, the events should be carefully considered: only the events that make sense to &amp;ldquo;share&amp;rdquo; over all implementations, need this approach.&lt;/p></description></item></channel></rss>
&lt;p>Obviously, the events should be carefully considered: only the events that make sense to &amp;ldquo;share&amp;rdquo; over all implementations, need this approach.&lt;/p></description></item><item><title>Docs: Template Method Pattern</title><link>https://alguidelines.dev/docs/patterns/template-method-pattern/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://alguidelines.dev/docs/patterns/template-method-pattern/</guid><description>
&lt;p>&lt;em>Created by Patrick Schiefer, Described by Patrick Schiefer&lt;/em>&lt;/p>
&lt;h2 id="abstract">Abstract&lt;/h2>
&lt;p>The goal of this pattern is to simplify the solution of similar problems and make your code more readable.&lt;/p>
&lt;h2 id="problem">Problem&lt;/h2>
&lt;p>In nearly every app you sometimes have to solve similar problems for different cases. Mostly not the same developer will solve every case. This results in different solutions.&lt;/p>
&lt;h2 id="description">Description&lt;/h2>
&lt;p>The pattern is used when you have problems which are independent but require the same logical flow. Examples which occur very often are: &lt;em>Posting Documents&lt;/em>, &lt;em>Printing Reports&lt;/em> or &lt;em>Exporting Data&lt;/em>.&lt;/p>
&lt;h2 id="bad-code-example">Bad Code Example&lt;/h2>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">50010&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportSalesLines&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportData&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesHeader&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Record&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Header&amp;#34;&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLine&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Record&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Line&amp;#34;&lt;span style="color:#ce5c00;font-weight:bold">)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">if&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">not&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>CheckData&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>&lt;span style="color:#204a87;font-weight:bold">then&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">exit&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">repeat&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">case&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>ExportType&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">of&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>ExportType&lt;span style="color:#000;font-weight:bold">::&lt;/span>A&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>GenerateLineTypeA&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesLine&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>ExportType&lt;span style="color:#000;font-weight:bold">::&lt;/span>B&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>GenerateLineTypeB&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesLine&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">until&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLine&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>Next&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>=&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">0&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">case&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>ExportType&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">of&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>ExportType&lt;span style="color:#000;font-weight:bold">::&lt;/span>A&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>WriteToFile&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>ExportType&lt;span style="color:#000;font-weight:bold">::&lt;/span>B&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SendToWebService&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#8f5902;font-style:italic">//TODO Implementation of procedures used in example
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#8f5902;font-style:italic">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>As you can see in this example the readability gets worse with every new case.&lt;/p>
&lt;h2 id="the-pattern">The Pattern&lt;/h2>
&lt;p>To implement the Pattern you need at least 3 objects:&lt;/p>
&lt;ul>
&lt;li>A template codeunit&lt;/li>
&lt;li>An Interface which provides the needed procedures&lt;/li>
&lt;li>A codeunit which Implements the interrface&lt;/li>
&lt;/ul>
&lt;p>In my example I show how to implement a data export with templating.&lt;/p>
&lt;p>We start with the template&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">50000&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportTemplate&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportData&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>export&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Interface&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IDataExport&lt;span style="color:#ce5c00;font-weight:bold">)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">if&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">not&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>CheckData&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>&lt;span style="color:#204a87;font-weight:bold">then&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">exit&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">if&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>GetLinesToExport&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>&lt;span style="color:#204a87;font-weight:bold">then&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">repeat&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>ExportLine&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">until&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">not&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>NextLine&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>Finish&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>As you can see the template just calls procedures via an interface and just defines the flow of the export without really implementing it.&lt;/p>
&lt;p>As the second part we need an interface for the export functions&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">interface&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IDataExport&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>CheckData&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>GetLinesToExport&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportLine&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>NextLine&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>Finish&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>And now we need an implementation. For my example I wrote a export Codeunit for Sales Headers&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">50001&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeaderExport&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">implements&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IDataExport&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SetSalesHeader&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>DocType&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Document Type&amp;#34;&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>No&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Code&lt;/span>[&lt;span style="color:#0000cf;font-weight:bold">10&lt;/span>]&lt;span style="color:#ce5c00;font-weight:bold">)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>Get&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>DocType&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>No&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>CheckData&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>&lt;span style="color:#204a87;font-weight:bold">TestField&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>Status&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>&amp;#34;Sales Document Status&amp;#34;&lt;span style="color:#000;font-weight:bold">::&lt;/span>Released&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>GetLinesToExport&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLines&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>SetRange&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>&amp;#34;Document Type&amp;#34;&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>&amp;#34;Document Type&amp;#34;&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLines&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>SetRange&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>&amp;#34;Document No.&amp;#34;&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>&amp;#34;No.&amp;#34;&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">exit&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesLines&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>FindSet&lt;span style="color:#ce5c00;font-weight:bold">())&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportLine&lt;span style="color:#ce5c00;font-weight:bold">()
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#8f5902;font-style:italic">//Generate Exportdata here
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#8f5902;font-style:italic">&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>NextLine&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>Steps&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">integer&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">exit&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesLines&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>Next&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>Steps&lt;span style="color:#ce5c00;font-weight:bold">) &lt;/span>&amp;lt;&amp;gt;&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">0&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>Finish&lt;span style="color:#ce5c00;font-weight:bold">()
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#8f5902;font-style:italic">// Send or Save data here
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#8f5902;font-style:italic">&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">var&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Record&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Header&amp;#34;&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLines&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Record&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Line&amp;#34;&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Now lets have a look how to use the pattern&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">50002&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportOrders&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportOrder&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>DocType&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Document Type&amp;#34;&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>No&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Code&lt;/span>[&lt;span style="color:#0000cf;font-weight:bold">10&lt;/span>]&lt;span style="color:#ce5c00;font-weight:bold">)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">var&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportTemplate&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportImpl&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeaderExport&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportInt&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Interface&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IDataExport&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportImpl&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>SetSalesHeader&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>DocType&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>No&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportInt&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">:=&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportImpl&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>ExportData&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>exportInt&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="benefits">Benefits&lt;/h2>
&lt;p>Your code gains readability and it is very easy to add new cases for the template. You don&amp;rsquo;t always have to think about the whole logic. You just have to implement the details.&lt;/p>
&lt;h2 id="when-not-to-use">When not to use&lt;/h2>
&lt;p>The Pattern should not be used for problems which differ too much. For example, if you have two data exports in your app, one is exporting header and lines and the second one only export header. In this case I would suggest to not use the pattern or to make two templates out of it.&lt;/p>
&lt;h2 id="references">References&lt;/h2>
&lt;p>&lt;a href="https://patrickschiefer.com/2022/04/08/template-method-pattern/">Detailed Explanation of the pattern&lt;/a>&lt;/p></description></item></channel></rss>

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@ -3207,23 +3207,130 @@ And because of that, it so much more maintainable, upgradable, readable, .. . On
&lt;td>Osynch&lt;/td>
&lt;/tr>
&lt;/tbody>
&lt;/table></description></item><item><title>Docs: Unnecessary else</title><link>https://alguidelines.dev/docs/bestpractices/unnecessary-else/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://alguidelines.dev/docs/bestpractices/unnecessary-else/</guid><description>
&lt;p>&lt;em>Created by Microsoft, Described by waldo&lt;/em>&lt;/p>
&lt;/table></description></item><item><title>Docs: Template Method Pattern</title><link>https://alguidelines.dev/docs/patterns/template-method-pattern/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://alguidelines.dev/docs/patterns/template-method-pattern/</guid><description>
&lt;p>&lt;em>Created by Patrick Schiefer, Described by Patrick Schiefer&lt;/em>&lt;/p>
&lt;h2 id="abstract">Abstract&lt;/h2>
&lt;p>The goal of this pattern is to simplify the solution of similar problems and make your code more readable.&lt;/p>
&lt;h2 id="problem">Problem&lt;/h2>
&lt;p>In nearly every app you sometimes have to solve similar problems for different cases. Mostly not the same developer will solve every case. This results in different solutions.&lt;/p>
&lt;h2 id="description">Description&lt;/h2>
&lt;p>&lt;code>else&lt;/code> should not be used when the last action in the &lt;code>then&lt;/code> part is an &lt;code>exit&lt;/code>, &lt;code>break&lt;/code>, &lt;code>skip&lt;/code>, &lt;code>quit&lt;/code>, &lt;code>error&lt;/code>.&lt;/p>
&lt;h2 id="bad-code">Bad code&lt;/h2>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SomeProcedure&lt;span style="color:#ce5c00;font-weight:bold">()
&lt;p>The pattern is used when you have problems which are independent but require the same logical flow. Examples which occur very often are: &lt;em>Posting Documents&lt;/em>, &lt;em>Printing Reports&lt;/em> or &lt;em>Exporting Data&lt;/em>.&lt;/p>
&lt;h2 id="bad-code-example">Bad Code Example&lt;/h2>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">50010&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportSalesLines&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportData&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesHeader&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Record&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Header&amp;#34;&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLine&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Record&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Line&amp;#34;&lt;span style="color:#ce5c00;font-weight:bold">)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">if&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IsAdjmtBinCodeChanged&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>&lt;span style="color:#204a87;font-weight:bold">then&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>Error&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>AdjmtBinCodeChangeNotAllowedErr&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">...)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">else&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>Error&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>BinCodeChangeNotAllowedErr&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">...)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">if&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">not&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>CheckData&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>&lt;span style="color:#204a87;font-weight:bold">then&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">exit&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">repeat&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">case&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>ExportType&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">of&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>ExportType&lt;span style="color:#000;font-weight:bold">::&lt;/span>A&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>GenerateLineTypeA&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesLine&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>ExportType&lt;span style="color:#000;font-weight:bold">::&lt;/span>B&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>GenerateLineTypeB&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesLine&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="good-code">Good code&lt;/h2>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SomeProcedure&lt;span style="color:#ce5c00;font-weight:bold">()
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">until&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLine&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>Next&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>=&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">0&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">case&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>ExportType&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">of&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>ExportType&lt;span style="color:#000;font-weight:bold">::&lt;/span>A&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>WriteToFile&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>ExportType&lt;span style="color:#000;font-weight:bold">::&lt;/span>B&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SendToWebService&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#8f5902;font-style:italic">//TODO Implementation of procedures used in example
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#8f5902;font-style:italic">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>As you can see in this example the readability gets worse with every new case.&lt;/p>
&lt;h2 id="the-pattern">The Pattern&lt;/h2>
&lt;p>To implement the Pattern you need at least 3 objects:&lt;/p>
&lt;ul>
&lt;li>A template codeunit&lt;/li>
&lt;li>An Interface which provides the needed procedures&lt;/li>
&lt;li>A codeunit which Implements the interrface&lt;/li>
&lt;/ul>
&lt;p>In my example I show how to implement a data export with templating.&lt;/p>
&lt;p>We start with the template&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">50000&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportTemplate&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportData&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>export&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Interface&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IDataExport&lt;span style="color:#ce5c00;font-weight:bold">)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">if&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IsAdjmtBinCodeChanged&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>&lt;span style="color:#204a87;font-weight:bold">then&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>Error&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>AdjmtBinCodeChangeNotAllowedErr&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">...)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>Error&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>BinCodeChangeNotAllowedErr&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">...)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">if&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">not&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>CheckData&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>&lt;span style="color:#204a87;font-weight:bold">then&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">exit&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">if&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>GetLinesToExport&lt;span style="color:#ce5c00;font-weight:bold">() &lt;/span>&lt;span style="color:#204a87;font-weight:bold">then&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">repeat&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>ExportLine&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">until&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">not&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>NextLine&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div></description></item></channel></rss>
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>Finish&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>As you can see the template just calls procedures via an interface and just defines the flow of the export without really implementing it.&lt;/p>
&lt;p>As the second part we need an interface for the export functions&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">interface&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IDataExport&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>CheckData&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>GetLinesToExport&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportLine&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>NextLine&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>Finish&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>And now we need an implementation. For my example I wrote a export Codeunit for Sales Headers&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">50001&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeaderExport&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">implements&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IDataExport&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SetSalesHeader&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>DocType&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Document Type&amp;#34;&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>No&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Code&lt;/span>[&lt;span style="color:#0000cf;font-weight:bold">10&lt;/span>]&lt;span style="color:#ce5c00;font-weight:bold">)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>Get&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>DocType&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>No&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>CheckData&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>&lt;span style="color:#204a87;font-weight:bold">TestField&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>Status&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#000;font-weight:bold">::&lt;/span>&amp;#34;Sales Document Status&amp;#34;&lt;span style="color:#000;font-weight:bold">::&lt;/span>Released&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>GetLinesToExport&lt;span style="color:#ce5c00;font-weight:bold">()&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLines&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>SetRange&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>&amp;#34;Document Type&amp;#34;&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>&amp;#34;Document Type&amp;#34;&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLines&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>SetRange&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>&amp;#34;Document No.&amp;#34;&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>&amp;#34;No.&amp;#34;&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">exit&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesLines&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>FindSet&lt;span style="color:#ce5c00;font-weight:bold">())&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportLine&lt;span style="color:#ce5c00;font-weight:bold">()
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#8f5902;font-style:italic">//Generate Exportdata here
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#8f5902;font-style:italic">&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>NextLine&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>Steps&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">integer&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Boolean&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">exit&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>SalesLines&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>Next&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>Steps&lt;span style="color:#ce5c00;font-weight:bold">) &lt;/span>&amp;lt;&amp;gt;&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">0&lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>Finish&lt;span style="color:#ce5c00;font-weight:bold">()
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#8f5902;font-style:italic">// Send or Save data here
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#8f5902;font-style:italic">&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">var&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeader&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Record&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Header&amp;#34;&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesLines&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Record&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Line&amp;#34;&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;p>Now lets have a look how to use the pattern&lt;/p>
&lt;div class="highlight">&lt;pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;">&lt;code class="language-al" data-lang="al">&lt;span style="display:flex;">&lt;span>&lt;span style="color:#204a87;font-weight:bold">codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#0000cf;font-weight:bold">50002&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportOrders&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>{&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">procedure&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportOrder&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>DocType&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Enum&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&amp;#34;Sales Document Type&amp;#34;&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>No&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Code&lt;/span>[&lt;span style="color:#0000cf;font-weight:bold">10&lt;/span>]&lt;span style="color:#ce5c00;font-weight:bold">)
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#ce5c00;font-weight:bold"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">var&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>ExportTemplate&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportImpl&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Codeunit&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>SalesHeaderExport&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportInt&lt;span style="color:#000;font-weight:bold">:&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">Interface&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>IDataExport&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">begin&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportImpl&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>SetSalesHeader&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>DocType&lt;span style="color:#000;font-weight:bold">,&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>No&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportInt&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#ce5c00;font-weight:bold">:=&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>exportImpl&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>export&lt;span style="color:#ce5c00;font-weight:bold">.&lt;/span>ExportData&lt;span style="color:#ce5c00;font-weight:bold">(&lt;/span>exportInt&lt;span style="color:#ce5c00;font-weight:bold">)&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline"> &lt;/span>&lt;span style="color:#204a87;font-weight:bold">end&lt;/span>&lt;span style="color:#000;font-weight:bold">;&lt;/span>&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;span style="display:flex;">&lt;span>&lt;span style="color:#f8f8f8;text-decoration:underline">&lt;/span>}&lt;span style="color:#f8f8f8;text-decoration:underline">
&lt;/span>&lt;/span>&lt;/span>&lt;/code>&lt;/pre>&lt;/div>&lt;h2 id="benefits">Benefits&lt;/h2>
&lt;p>Your code gains readability and it is very easy to add new cases for the template. You don&amp;rsquo;t always have to think about the whole logic. You just have to implement the details.&lt;/p>
&lt;h2 id="when-not-to-use">When not to use&lt;/h2>
&lt;p>The Pattern should not be used for problems which differ too much. For example, if you have two data exports in your app, one is exporting header and lines and the second one only export header. In this case I would suggest to not use the pattern or to make two templates out of it.&lt;/p>
&lt;h2 id="references">References&lt;/h2>
&lt;p>&lt;a href="https://patrickschiefer.com/2022/04/08/template-method-pattern/">Detailed Explanation of the pattern&lt;/a>&lt;/p></description></item></channel></rss>

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