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https://issues.apache.org/jira/browse/GROOVY-11706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17997089#comment-17997089
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Xiaotian Ma commented on GROOVY-11706:
--------------------------------------

[~blackdrag] Thanks a lot for your reply! I noticed this usage, but it will 
tell me that the Java annotation is used in the wrong position and cannot be 
used on the type parameter. If I use the compiler directly, it can be compiled 
successfully. So I'm sure I must have used the wrong way to load classes.

> How to run Groovy compiler via class loader without altering thread context 
> classloader?
> ----------------------------------------------------------------------------------------
>
>                 Key: GROOVY-11706
>                 URL: https://issues.apache.org/jira/browse/GROOVY-11706
>             Project: Groovy
>          Issue Type: Question
>          Components: Compiler
>            Reporter: Xiaotian Ma
>            Priority: Major
>
> When using direct reflection access to the main method of the 
> FileSystemCompiler class, some transformer classes do not seem to load 
> correctly. (The error is: Could not find class for Transformation Processor 
> org.codehaus.groovy.transform.trait.TraitASTTransformation declared by 
> groovy.transform.Trait)
> My original requirement was to use code instead of accessing multiple Groovy 
> compilers simultaneously from the command line. Since different versions 
> cannot coexist, I need to use classLoader to isolate them.



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