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https://issues.apache.org/jira/browse/GROOVY-10570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17522841#comment-17522841
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Eric Milles commented on GROOVY-10570:
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{{@AnnotationCollector}}Â requires the use of the AST transform to work. If you
wanted to write the annotation in java, you would need to recreate the storage
mechanism that the transform relies on. This is a {{serializeClass}} attribute
in legacy scenarios and an inner class "AnnoType$CollectorHelper" in more
recent releases. You could probably reverse engineer it from a compiled
meta-annotation, but the details are probably not considered API.
In GROOVY-10571 you have Java depends on Groovy depends on Java. This
bi-directional dependency is supported in many cases, but there are some edge
cases, like class literals, that can be difficult to work out before resolving
either Java or Groovy types. Eclipse has a different mechanism from the stub
generation to support these types of relationships. You can try out the
{{groovy-eclipse-batch}} compiler as an alternative to {{groovyc}} for
Ant/Maven/... builds.
> AnnotationCollector produces unspecified errors when used in Java
> -----------------------------------------------------------------
>
> Key: GROOVY-10570
> URL: https://issues.apache.org/jira/browse/GROOVY-10570
> Project: Groovy
> Issue Type: Bug
> Components: Compiler
> Affects Versions: 4.0.1
> Reporter: Christopher Smith
> Priority: Minor
>
> I have an {{AnnotationCollector}} that refers to some Java classes (type
> converters). The stub generator has an error generating the stub, so I tried
> writing the annotation itself in Java. While this compiled correctly, when
> compiling tests using that annotation I get a BUG! in the Groovy compiler:
> {code}
> BUG! exception in phase 'semantic analysis' in source unit
> '/home/christopher/git/.../IgnoreMetaClassAttributeConverterProviderTest.groovy'
> com.example.DynamoDbRecord.value()
> ...
> Caused by: java.lang.NoSuchMethodException: com.example.DynamoDbRecord.value()
> at java.lang.Class.getMethod (Class.java:2108)
> at
> org.codehaus.groovy.transform.AnnotationCollectorTransform.getTargetListFromClass
> (AnnotationCollectorTransform.java:276)
> at org.codehaus.groovy.transform.AnnotationCollectorTransform.getMeta
> (AnnotationCollectorTransform.java:76)
> at
> org.codehaus.groovy.transform.AnnotationCollectorTransform.getStoredTargetList
> (AnnotationCollectorTransform.java:226)
> at
> org.codehaus.groovy.transform.AnnotationCollectorTransform.getTargetAnnotationList
> (AnnotationCollectorTransform.java:356)
> at org.codehaus.groovy.transform.AnnotationCollectorTransform.visit
> (AnnotationCollectorTransform.java:383)
> at
> org.codehaus.groovy.transform.ASTTransformationCollectorCodeVisitor.findCollectedAnnotations
> (ASTTransformationCollectorCodeVisitor.java:207)
> at
> org.codehaus.groovy.transform.ASTTransformationCollectorCodeVisitor.visitAnnotations
> (ASTTransformationCollectorCodeVisitor.java:93)
> {code}
> Adding a {{String value default ""}} to the annotation produces an NPE.
> It would make sense to me to learn that using {{AnnotationCollector}} in Java
> is unsupported, but the Groovy compiler should probably have a better error
> report.
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