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javax.persistence Annotation MapKeyJoinColumn Target: Fields (including property get methods ... annotation is specified, a single join column is assumed and the default values apply. Example 1 ... ) Whether the property is a unique key. This is a shortcut for the UniqueConstraint annotation at the table level


javax.persistence Annotation ExcludeSuperclassListeners Target: Classes Specifies that the invocation of superclass listeners is to be excluded for the entity class (or mapped superclass ... /JPA manual. This annotation is a marker annotation (with no elements).


javax.persistence Annotation Version Target: Fields (including property get methods) Specifies the version field or property of an entity class that serves as its optimistic lock value. The version ... how to define and use version fields in Chapter 2 of the ObjectDB/JPA manual. This annotation is a marker annotation (with no elements).


Annotation Element javax.jdo.annotations.Join ForeignKeyAction deleteAction Delete action to be applied to any ForeignKey on this join. Returns: the delete action Default value: javax.jdo.annotations.ForeignKeyAction.UNSPECIFIED Since: JDO 2.1


Annotation Element javax.jdo.annotations.Inheritance InheritanceStrategy strategy Strategy to use for inheritance. Specifies in which table(s) the members for the class are stored. Returns: the inheritance strategy Default value: javax.jdo.annotations.InheritanceStrategy.UNSPECIFIED Since: JDO 2.1


Annotation Element javax.jdo.annotations.Version VersionStrategy strategy Strategy for versioning of objects of this class. Returns: the strategy for versioning objects of this class Default value: javax.jdo.annotations.VersionStrategy.UNSPECIFIED Since: JDO 2.1


javax.jdo.annotations Enum ForeignKeyAction java.lang.Object java.lang.Enum<javax.jdo.annotations.ForeignKeyAction> javax.jdo.annotations.ForeignKeyAction Implemented Interfaces: Serializable, Comparable<ForeignKeyAction> Enumeration of the foreign-key delete/update action values


javax.jdo.annotations Enum NullValue java.lang.Object java.lang.Enum<javax.jdo.annotations.NullValue> javax.jdo.annotations.NullValue Implemented Interfaces: Serializable, Comparable<NullValue> Enumeration of the "null-value" behavior values. This corresponds to the "null-value


Annotation Element javax.jdo.annotations.Element ForeignKeyAction deleteAction Delete action to apply to any foreign key for the element. Returns: delete action to apply to any foreign key for the element Default value: javax.jdo.annotations.ForeignKeyAction.UNSPECIFIED Since: JDO 2.1


Annotation Element javax.jdo.annotations.ForeignKey ForeignKeyAction updateAction The update action of this foreign key. Returns: the update action of this foreign key Default value: javax.jdo.annotations.ForeignKeyAction.RESTRICT Since: JDO 2.1

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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