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From "David M. Lloyd (JIRA)" <j...@codehaus.org>
Subject [jira] (MCOMPILER-207) Support separate GAV list for annotation processors
Date Fri, 14 Jun 2013 03:17:03 GMT
David M. Lloyd created MCOMPILER-207:
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             Summary: Support separate GAV list for annotation processors
                 Key: MCOMPILER-207
                 URL: https://jira.codehaus.org/browse/MCOMPILER-207
             Project: Maven 2.x Compiler Plugin
          Issue Type: New Feature
            Reporter: David M. Lloyd


Currently, the compiler plugin searches for annotation processors on the compile class path
using the default search algorithm.  This can be problematic when having annotation processor
JARs or their dependencies on the compile classpath adversely affects compilation behavior,
sometimes even making compilation impossible.

It should be possible to alternatively explicitly give a list of artifacts to pass in to the
compiler as the annotation processor path.  This would correspond to the standard "-processorpath"
option.  When given in this way, these artifacts (and their transitive dependencies) would
have an isolated class loader which could "see" classes on the compile class path but not
*be* "seen" by classes on the compile class path.

This list would be defined in the compiler plugin configuration section as a list of artifacts
with optional nested exclusions and that sort of thing (no scope though, as annotation processing
is only applicable to compilation).  I imagine that these artifacts would behave largely similarly
to normal dependencies (i.e. subject to {{<dependencyManagement>}} sections), and any
dependencies which are already on the compile class path would be chosen from the compile
class loader rather than being duplicated in the processor class loader.


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