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https://issues.apache.org/jira/browse/GROOVY-9632?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King closed GROOVY-9632.
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> Java 8 Type Param Annotation Not Generated in Byte Code
> -------------------------------------------------------
>
> Key: GROOVY-9632
> URL: https://issues.apache.org/jira/browse/GROOVY-9632
> Project: Groovy
> Issue Type: Bug
> Components: bytecode, Compiler
> Affects Versions: 3.0.4
> Environment: Ubuntu, Groovy 3.0.4, Eclipse Groovy Plugin on Maven
> Reporter: Ankur Pathak
> Assignee: Paul King
> Priority: Major
> Labels: breaking_change
> Fix For: 4.0.0-beta-1
>
> Time Spent: 2h 50m
> Remaining Estimate: 0h
>
> Groovy 3.0.4 is based on Java Minimum Version 1.8. So it should support Byte
> Code Level compatible with Java 8. And It should generate Annotations on Type
> Param in its Byte Code.
> ```
> class Names {
> @NotEmpty
> List< @NotEmpty String> names;
> }
> Annotation @NotEmpty on Type Param String is not generated in Byte Code
> generated by Groovy 3.
> So as a result Bean Validation Api 2.0 is not working with Groovy.
>
> We have a similar issue in Kotlin also and as a result Bean Validation Api
> 2.0 was not working ith Kotlin as well.
> Links to similar issue reported with Spring Team and Kotlin Team are:
> [https://github.com/spring-projects/spring-framework/issues/21462]
> [https://youtrack.jetbrains.com/issue/KT-25158]
>
> ```
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