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https://issues.apache.org/jira/browse/OPENJPA-2800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17092763#comment-17092763
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Mark Struberg commented on OPENJPA-2800:
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I'd go as far as setting it on by default in master. It's clearly more correct.
> StateManager field in enhanced entities are not "synthetic"
> -----------------------------------------------------------
>
> Key: OPENJPA-2800
> URL: https://issues.apache.org/jira/browse/OPENJPA-2800
> Project: OpenJPA
> Issue Type: Bug
> Components: Enhance
> Affects Versions: 2.4.3
> Reporter: Alexander Falb
> Priority: Minor
> Attachments: image-2020-01-15-08-12-02-066.png
>
>
> I'm using reflection to do various things on an entity-class during my unit
> tests. Because my tests are not interested in any of OpenJPAs internals, I'm
> trying to skip any field generated during enhancement. Basically I skip every
> field with where
> [Field#isSynthetic|https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html#isSynthetic--]]
> is true. The pcStateManager however does not have the flag ACC_SYNTHETIC set:
> {code:java}
> $ javap -verbose MyEntity.class
> [...]
> protected transient org.apache.openjpa.enhance.StateManager pcStateManager;
> descriptor: Lorg/apache/openjpa/enhance/StateManager;
> flags: ACC_PROTECTED, ACC_TRANSIENT
> [...]
> {code}
> According to the [JVM
> Specs|https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.8]
> {quote}[...]A class member that does not appear in the source code must be
> marked using a Synthetic attribute, or else it must have its ACC_SYNTHETIC
> flag set.[...]
> {quote}
> Is this flag intentionally not set?
>
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