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https://issues.apache.org/jira/browse/GROOVY-7422?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King resolved GROOVY-7422.
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Resolution: Fixed
> @AnnotationCollector could provide more control over how annotations are
> added in the presence of existing explicit annotations
> -------------------------------------------------------------------------------------------------------------------------------
>
> Key: GROOVY-7422
> URL: https://issues.apache.org/jira/browse/GROOVY-7422
> Project: Groovy
> Issue Type: Improvement
> Components: xforms
> Affects Versions: 2.4.3
> Reporter: Paul King
> Assignee: Paul King
> Fix For: 2.5.0-beta-1
>
>
> When expanding a meta annotation alias into its annotation collection, it is
> sometimes useful to be able to control how annotations are added in
> particular in the presence of existing explicit annotations. This issue
> proposes adding an annotation parameter to {{@AnnotationCollection}} which
> lets the addition of collected annotations be controlled in more flexible
> ways. The following modes are proposed for @AC:
> {code}
> DUPLICATE: Annotations from the annotation collection will always be
> inserted. After all transforms have been run, it will be an error if multiple
> annotations (excluding those with SOURCE retention) exist.
> PREFER_COLLECTOR: Annotations from the collector will be added and any
> existing annotations with the same name will be removed.
> PREFER_EXPLICIT: Annotations from the collector will be ignored if any
> existing annotations with the same name are found.
> PREFER_COLLECTOR_MERGED: Annotations from the collector will be added and any
> existing annotations with the same name will be removed but any new
> parameters found within existing annotations will be merged into the added
> annotation.
> PREFER_EXPLICIT_MERGED: Annotations from the collector will be ignored if any
> existing annotations with the same name are found but any new parameters on
> the collector annotation will be added to existing annotations.
> {code}
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