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https://issues.apache.org/jira/browse/GROOVY-7667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17761848#comment-17761848
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Eric Milles commented on GROOVY-7667:
-------------------------------------
If you do something like this:
{code:groovy}
@A
@B
@AnnotationCollector
@Target(ElementType.ANNOTAITON)
@Retention(RetentionPolicy.CLASS)
public @interface C {
}
{code}
Only the annotations before the {{@AnnotationCollector}} should be collected.
This is described in the docs very briefly.
https://github.com/apache/groovy/blob/5c6644bfe30c130af6d734bf6b371a2259efe10d/src/main/java/groovy/transform/AnnotationCollector.java#L148
An example is Immutable:
https://github.com/apache/groovy/blob/5c6644bfe30c130af6d734bf6b371a2259efe10d/src/main/groovy/groovy/transform/Immutable.groovy#L200
> AnnotationCollector should disregard @Target and @Retention
> -----------------------------------------------------------
>
> Key: GROOVY-7667
> URL: https://issues.apache.org/jira/browse/GROOVY-7667
> Project: Groovy
> Issue Type: Improvement
> Affects Versions: 2.4.5
> Reporter: Christopher Smith
> Priority: Minor
> Labels: annotations
>
> I attempted to set up an annotation-inheritance situation using
> {{@AnnotationCollector}}, and I wrote the intermediate collector in Java.
> Since the intermediate collector was applied to my leaf collector, I put
> {{@Target(ElementType.ANNOTATION_TYPE)}} on the intermediate collector, but
> it appears that Groovy copied that annotation to the final target class,
> where it wasn't allowed and produced a compiler error.
> I suggest that {{@Target}} and {{@Retention}} should be specifically ignored
> when added to a collector annotation.
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