Type-safely embed DSLs directly into Java

Except it is not really embedded in Java, only in comments.<p>I sincerely hope this dies a quick death.<p>Java with its jars and infrastructure already makes it plenty convenient to work with resources without them having to be in your face when you are editing the file. Good IDE lets you move between the resource file and the code with a single click.

I&#x27;m curious how this works under the hood, looks like it&#x27;s added as an annotation processor, and the DSL is embedded in specially formatted comments, but not in annotations. This implies to me the annotation processor is processing the comments in a source file? I did not know annotation processors could do this! Also implies comments carry through to the compiled .class files which I did not think they did either (runtime bytedcode weaving)?

Thank you for making this.<p>Have you considered an approach based on annotations and multi-line strings? I&#x27;m not sure string constants are valid targets for annotations but maybe that could be added to the language?<p><pre><code> @Language(name=&quot;Javascript&quot;) &quot;&quot;&quot; function callBark(aBarker) { aBarker.bark(); } &quot;&quot;&quot;</code></pre>

The graphql example is not the greatest, but I would personally use GQL Code Generator to create a little strongy typed client for all your .graphql files:<p><a href="https:&#x2F;&#x2F;graphql-code-generator.com&#x2F;docs&#x2F;plugins&#x2F;java" rel="nofollow">https:&#x2F;&#x2F;graphql-code-generator.com&#x2F;docs&#x2F;plugins&#x2F;java</a><p>Not sure if there&#x27;s a strong use-case in general here. Even Groovy code, which is a popular choice for JVM DSL languages, has pretty excellent stub generation.

You can write other languages like this in Groovy using Intellij. Intellij allows you to annotate a multiline string as another language, then it will parse and syntax color, autoformat for you. The use case would be when you are templating frontend code snippets on the server side. I&#x27;m not sure if its just Groovy though, I&#x27;m betting Intellij can probably do this with other languages that have multiline strings.

This is cooool!