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JPA Annotations for Fields
The way a field of a persistable class is managed by JPA can be set by the following annotations:
Additional annotations (and enum) are designated for enum fields:
Other additional annotations (and enum) are designated for date and calendar fields:
Chapter 2 of the ObjectDB manual explains how to use all the above annotations.
This documentation page is derived (with some adjustments) from the open source JPA 2 RI (EclipseLink)
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
Object Relational Mapping (ORM) JPA 2 providers include Hibernate, EclipseLink, TopLink, OpenJPA and DataNucleus.
Object DB is not an ORM JPA implementation but an Object Database for Java with built in JPA 2 support.
Which JPA is Faster?
See a comparison of Hibernate, EclipseLink, OpenJPA, DataNucleus, MySQL, Postgres, Derby, HSQLDB, H2 Database, SQLite and ObjectDB
in the JPA Benchmark.
