A warning message should be logged when a down level enhanced Entity is
encountered.
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Key: OPENJPA-1707
URL: https://issues.apache.org/jira/browse/OPENJPA-1707
Project: OpenJPA
Issue Type: Improvement
Components: kernel
Affects Versions: 2.0.0
Reporter: Rick Curtis
Assignee: Rick Curtis
Currently when PCEnhancer is called to enhance an Entity that was previous
enhanced it will simply noop and move on. It could be smarter and use the
PersistenceCapable.pcGetEnhancementContractVersion to detect and when an Entity
has been enhanced with an older version of the enhancer and log a warning
message. A similar change would also need to be made to
PCClassFileTransformer.needsEnhance to perform the same sort of logic at
runtime.
This would be particularly helpful in the case where an application was
compiled/enhanced/packaged and a bug was fixed in the enhancer but the
pre-packaged app still has the bad bytecode.
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