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POConvert Object to Xtext DSL
 

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    <p>I've defined a simple Xtext grammar which looks like this (simplified):</p> <pre><code>grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals generate myDsl "http://www.xtext.org/example/mydsl/MyDsl" import "http://www.eclipse.org/emf/2002/Ecore" as ecore System: 'Define System' ( 'Define Components' '{' components+=Component+ '}' ) 'End' ; Component: 'Component' name=ID 'Value' value=Double ';' ; Double returns ecore::EDouble: '-'? INT? '.' INT ; </code></pre> <p><strong>The problem I like to solve is - how can I convert a simple Java Object to a valid xtext file?</strong></p> <p>To simplify my problem, lets say we create a list of components in Java:</p> <pre><code>List&lt;Component&gt; components = new ArrayList&lt;Component&gt;(); components.add(new Component("FirstComponent", 1.0)); components.add(new Component("SecondComponent", 2.0)); components.add(new Component("ThirdComponent", 3.0)); </code></pre> <p>The output-file I like to create should look like this:</p> <pre><code>Define System Define Components { Component FirstComponent Value 1.0; Component SecondComponent Value 2.0; Component ThirdComponent Value 3.0; } End </code></pre> <p>It is important that this file is checked by the xtext grammar, so that it's valid. I Hope you have any ideas for me. Here are some of mine, but so far I don't know how to implement them:</p> <p>Idea #1: I know how to read and write a file. In my head one solution could look like this: I have the list in my Java code, now I like to write a file which looks like the output-file above. Afterwards I like to read this file and check for errors by the grammar. How can I do this?</p> <p>Idea #2: If I imagine I would create a xml file out of Java code using JDOM, I wish I could do the same in xtext. Just define a parent "Define System" which ends with "End" (see my output-file) and then add a child "Define Components {" which ends with "}" and then add the children to this, e.g. "Component FirstComponent Value 1.0;". I hope this isn't confusing :-)</p> <p>Idea #3: I could use a template like the following and add children between the braces "{" ... "}":</p> <pre><code>Define System Define Components { ... } End </code></pre> <p>Btw: I already tried <a href="https://stackoverflow.com/questions/10917386/linking-xtext-with-stringtemplate-code-generator">Linking Xtext with StringTemplate code generator</a>, but it is kind of another problem. Hope you have any ideas.</p>
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