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EclipseLink/Development/JPA 2.0/canonical model generation
Contents
Canonical model generation
Issue Summary
With the new Criteria API from the JPA 2.0 spec, EclipseLink will provide a way to produce static metamodel classes corresponding to the entities, mapped superclasses, and embeddable classes in the persistence unit. A static metamodel class models the persistent state and relationships of the corresponding managed class.
For portability, EclipseLink will generate the canonical metamodel as defined in section 6.2.1.1.
General solution
EclipseLink will employ the annotation processor tool (APT) in conjunction with its existing metadata processing of annotations and XML to generate the static metamodel classes.
For more information on APT, see: http://java.sun.com/j2se/1.5.0/docs/guide/apt/GettingStarted.html
Metadata processing
Configuring and using within Eclipse Galileo
Configuring and using within ANT
1.2.0 RC4 Library names
Currently the target release of EclipseLink 1.2.0 is RC4 which uses the following jar files names in the ZIP installer. Please note that the ZIP installer is the only distribution of EclipseLink including the modelgen JAR file.
- Services file (enables the the processor).
\eclipselink\jlib\jpa\eclipselink-jpa-modelgen_1.2.0.v20091016-r5565.jar
- javax.persistence library
\eclipselink\jlib\jpa\javax.persistence_2.0_preview.jar
- EclipseLink jar
\eclipselink\jlib\eclipselink.jar