Fast Object Database for Java - with JPA/JDO support

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Apache License, Version 2.0, January 2004

" shall mean any work of authorship, including the original version of the Work and any modifications or
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javax.jdo.annotations.Version

javax.jdo.annotations Annotation Version Target: Classes Annotation for the versioning of the class. Corresponds to the xml element "version" of the "class" and "property" elements. Since: JDO 2.1 String column Name of the column for the version. Name of the column for the version. Returns
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javax.persistence.Version

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 ... control. Only a single Version property or field should be used per class; applications that use
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Version.strategy

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
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Version.indexed

Annotation Element javax.jdo.annotations.Version String indexed Whether the version column(s) is(are) indexed. Returns: whether the version column(s) is(are) indexed Default value: "" Since: JDO 2.1
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Version.customStrategy

Annotation Element javax.jdo.annotations.Version String customStrategy Custom strategy for versioning of objects of this class. If customStrategy is non-empty, strategy must be UNSPECIFIED. Returns: the custom strategy for versioning objects of this class Default value: "" Since: JDO 2.1
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Version.columns

Annotation Element javax.jdo.annotations.Version Column[] columns The column(s) making up the version. Returns: the column(s) making up the version Default value: {} Since: JDO 2.1
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Version.column

Annotation Element javax.jdo.annotations.Version String column Name of the column for the version. Returns: the name of the column for the version Default value: "" Since: JDO 2.1
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JPA Entity Fields

(Mapped By) fields Primary key (ID) fields Version field The first three groups (transient, persistent ... two groups (primary key and version fields) can only be used in entity classes. Primary key fields ... query is executed eagerly when the entity object is first accessed. Version Field ObjectDB maintains
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Constants.OPTION_VERSION_STATE_IMAGE

Static Field javax.jdo.Constants String OPTION_VERSION_STATE_IMAGE "javax.jdo.option.version.StateImage" Since: JDO 2.1 See Also: PersistenceManagerFactory.supportedOptions()

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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