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Difference between revisions of "EclipseLink/UserGuide/JPA/Basic JPA Development/Configuration/JPA/orm.xml"
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=orm.xml= | =orm.xml= | ||
+ | Use the '''orm.xml''' file to apply the metadata to the persistence unit. This metadata is a union of all the mapping files and the annotations (if there is no '''xml-mapping-metadata-complete''' element). If you use one mapping '''orm.xml''' file for your metadata and place this file in a META-INF directory on the classpath, then you do not need to explicitly list it. The EclipseLink persistence provider will automatically search for this file ('''orm.xml''')and use it. | ||
+ | If you use a different name for your mapping files, or place them in a different location, you must list them in the '''mapping-file''' element of the [[EclipseLink/UserGuide/JPA/Basic_JPA_Development/Configuration/JPA/persistence.xml|persistence.xml file]], as shown here: | ||
+ | <source lang="xml"> | ||
+ | <persistence-unit name="EmployeeService"> | ||
+ | <jta-data-source>jdbc/EmployeeServiceDS</jta-data-source> | ||
+ | <mapping-file>META-INF/employee_service_queries.xml</mapping-file> | ||
+ | </persistence-unit> | ||
+ | </source> | ||
+ | {{EclipseLink_Note | ||
+ | |note=In this example, the '''orm.xml''' file is not listed -- the persistence provider finds it by default. | ||
+ | }} | ||
{{EclipseLink_JPA | {{EclipseLink_JPA |
Revision as of 14:17, 16 June 2010
orm.xml
Use the orm.xml file to apply the metadata to the persistence unit. This metadata is a union of all the mapping files and the annotations (if there is no xml-mapping-metadata-complete element). If you use one mapping orm.xml file for your metadata and place this file in a META-INF directory on the classpath, then you do not need to explicitly list it. The EclipseLink persistence provider will automatically search for this file (orm.xml)and use it.
If you use a different name for your mapping files, or place them in a different location, you must list them in the mapping-file element of the persistence.xml file, as shown here:
<persistence-unit name="EmployeeService"> <jta-data-source>jdbc/EmployeeServiceDS</jta-data-source> <mapping-file>META-INF/employee_service_queries.xml</mapping-file> </persistence-unit>
Note: In this example, the orm.xml file is not listed -- the persistence provider finds it by default.