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From "Xavi Arias (JIRA)" <>
Subject [jira] Created: (OPENJPA-1891) PCEnhancer does not find meta data for entities using annotations
Date Thu, 18 Nov 2010 17:32:13 GMT
PCEnhancer does not find meta data for entities using annotations

                 Key: OPENJPA-1891
             Project: OpenJPA
          Issue Type: Bug
          Components: Enhance
    Affects Versions: 1.2.2
         Environment: Windows XP SP2
Spring 2.5.6
Tomcat 6.0.28
            Reporter: Xavi Arias
            Priority: Minor

The problem comes while enhancing entities at runtime by the Spring load time weaver mechanism.

Spring load time weaver is configured with "org.springframework.instrument.classloading.ReflectiveLoadTimeWeaver"
and Tomcat webapp class loader with "org.springframework.instrument.classloading.tomcat.TomcatInstrumentableClassLoader".
Everything works without any exception, but the enhancer does not find any entity meta data.
The log message for every entity is the following:

18:09:24,431 WARN  openjpa.Enhance - Type "class model.Contact" has no metadata; enhancing
as persistence aware. If you intended for "class com.rhodia.interactive.domain.model.profile.MyFavorite"
to be persistence-capable, then this means that OpenJPA could not find any metadata for "class
com.rhodia.interactive.domain.model.profile.MyFavorite". This can happen if the directory
containing your metadata is not in your CLASSPATH, or if your metadata files are not named
properly. See the documentation on metadata placement for more information.

After debugging, that the problem seems to come from the method parseClassAnnotations in AnnotationPersistenceMetaDataParser.
The call to J2DoPriv5Helper.isAnnotationPresentAction(_cls, Entity.class) always return false,
while the class is actually annotated as an entity. This is because the javax.persistence.Entity
class passed as parameter is not the same as the one in the entity class annotation map, so
the subsequent call to getAnnotation(Entity.class) always returns null.

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