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https://issues.apache.org/jira/browse/MPLUGIN-410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17572342#comment-17572342
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Romain Manni-Bucau commented on MPLUGIN-410:
--------------------------------------------

[~hboutemy] assume you have an interface `FileConfiguration` and an 
implementation you want to use (`implementation=xxx`) which is 
`FileConfigurationImpl`, then instead of doing `@Parameter 
List<FileConfiguration> configs;` you can do `@Parameter 
List<FileConfigurationImpl> configs;` and be it so `implementation=xxx` is 
almost always useless. For pluggable and heterogeneous cases (multiple 
implementations of `FileConfiguration` for example `LocalFileConfiguration` and 
`HDFSFileConfiguration`) then you can use plexus attributes to set the class (a 
bit like shade plugin does for transformers) and use `FileConfiguration` so 
both cases homogeneous (plugin driven) and heterogeneous (user driven) are 
already handled without this attribute from my window.

> Create implementation attribute for @Parameter as it exists for javadoc 
> @parameter
> ----------------------------------------------------------------------------------
>
>                 Key: MPLUGIN-410
>                 URL: https://issues.apache.org/jira/browse/MPLUGIN-410
>             Project: Maven Plugin Tools
>          Issue Type: Improvement
>          Components: maven-plugin-tools-annotations
>            Reporter: Herve Boutemy
>            Assignee: Slawomir Jaranowski
>            Priority: Major
>             Fix For: 3.7.0
>
>
> it exists in javadoc annotations: 
> https://maven.apache.org/plugin-tools/maven-plugin-tools-java/ (line 33)
> that goes into plugin.xml descriptor 
> https://maven.apache.org/ref/3.8.6/maven-plugin-api/plugin.html (line 44)
> but was forgotten in Java 5 annotations: 
> https://maven.apache.org/plugin-tools/maven-plugin-tools-annotations/ (line 
> 44)



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