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[ODB1] Chapter 4 - JDO Metadata

" default-fetch-group="false" /> embedded="true" /> embedded="false" /> embedded (true | false) The embedded
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javax.jdo.annotations.Embedded

javax.jdo.annotations Annotation Embedded Target: Fields (including property get methods) Annotation to define that the object is embedded into the table of the owning object. Corresponds to the xml element "embedded". Since: JDO 2.1 Persistent[] members Members for this embedding. Members
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Element.embedded

Annotation Element javax.jdo.annotations.Element String embedded Whether this element is embedded. Returns: whether this element is embedded Default value: "" Since: JDO 2.1
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Persistent.embedded

Annotation Element javax.jdo.annotations.Persistent String embedded Whether this member is embedded. Returns: whether this member is embedded Default value: "" Since: JDO 2.1
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Embedded.nullIndicatorColumn

Annotation Element javax.jdo.annotations.Embedded String nullIndicatorColumn The column in the embedded object used to judge if the embedded object is null. Returns: the null indicator column Default value: "" Since: JDO 2.1
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Embedded.members

Annotation Element javax.jdo.annotations.Embedded Persistent[] members Members for this embedding. Returns: the members embedded in the field or property being annotated Default value: {} Since: JDO 2.1
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Value.embedded

Annotation Element javax.jdo.annotations.Value String embedded Whether this value is embedded. Returns: whether this value is embedded Default value: "" Since: JDO 2.1
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Key.embedded

Annotation Element javax.jdo.annotations.Key String embedded Whether this key is embedded. Returns: whether this key is embedded Default value: "" Since: JDO 2.1
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Storing JPA Entity Objects

of other persistable types can only be stored in the database embedded in containing entities (as ... managed by the EntityManager) or by commit. Referenced Embedded Objects The following code stores ... embedded in containing entity objects. Therefore, if Address is defined as an embeddable class
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Embedded.ownerMember

Annotation Element javax.jdo.annotations.Embedded String ownerMember The member in the embedded object that links back to the owning object where it has a bidirectional relationship. Returns: the member that refers to the owner Default value: "" 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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