Migration to Maven 3: because of an API change in ModelProblemCollector between 3.0.x and 3.1.x, that interface cannot be used as-is for compatibility for both in order to determine if the coordinate information passed by the user is valid. The plugins are compiled with 3.0 core and are currently linked to a specific ModelProblemCollector, but starting with 3.1.0-alpha-1, Maven core calls a different method than the one the plugins were compiled with. This results in AbstractMethodError at run-time. (this was not detected by the ITs because, although they tested that the build failed with missing parameters, it didn't test the cause of the failure.)
Since the plugins are now using a new MavenProject instance, and attaching things to it in order to deploy or install them, it is possible to rely on the validation performed during the building of that project to catch model errors.
git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1770497 13f79535-47bb-0310-9956-ffa450edef68
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