Customization

Weaving

Specifies if weaving of the entity classes is performed. The EclipseLink JPA persistence provider uses weaving to enhance JPA entities for such properties as lazy loading, change tracking, fetch groups, and internal optimizations. Select from the following options:

• No Weaving

• Weave Dynamically

• Weave Statically -- Use this option if you plan to execute your application outside of a Java EE 5 container in an environment that does not permit the use of -javaagent:eclipselink.jar on the JVM command line. This assumes that classes have already been statically woven. Run the static weaver on the classes before deploying them.

Weave Dynamically

  Weaving Lazy

Select this optoin to enable lazy weaving.

  Weaving Fetch Groups

Select this option to enable fetch groups through weaving. Set this option to false if:

• There is no weaving.

• Classes should not be changed during weaving (for example, when debugging).

Set this property to false for platforms where it is not supported.

  Weaving Change Tracking

Select this option to use weaving to detect which fields or properties of the object change.

  Throw Exceptions

Select this option to set EclipseLink to throw an exception or log a warning when it encounters a problem with any of the files listed in a persistence.xml file <mapping-file> element.

Session Customizer

Select a session customizer class: a Java class that implements the eclipselink.tools.sessionconfiguration.SessionCustomizer interface and provides a default (zero-argument) constructor. Use this class' customize method, which takes an eclipselink.sessions.Session, to programmatically access advanced EclipseLink session API.

Descriptor Customizer

Select an EclipseLink descriptor customizer class–a Java class that implements the eclipselink.tools.sessionconfiguration.DescriptorCustomizer interface and provides a default (zero-argument) constructor. Use this class's customize method, which takes an eclipselink.descriptors.ClassDescriptor, to programmatically access advanced EclipseLink descriptor and mapping API for the descriptor associated with the JPA entity named <ENTITY>.