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javax.persistence.JoinTable

the mapping of associations. It is specified on the owning side of an association. A join table ... -to-one relationships, and one-to-one associations (both bidirectional and unidirectional). When a join table ... of the join table is assumed to be the table names of the associated primary tables concatenated
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javax.persistence.AssociationOverride

, the joinColumns element is used. If the relationship mapping uses a join table, the joinTable element must be specified to override the mapping of the join table and/or its join columns. Example 1: Overriding ... See Also: Embedded Embeddable MappedSuperclass AttributeOverride JoinColumn[] joinColumns The join
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JoinColumn.name

column. The table in which it is found depends upon the context. If the join is for a OneToOne or ... of the source entity or embeddable. If the join is for a unidirectional OneToMany mapping using a foreign key mapping strategy, the foreign key is in the table of the target entity. If the join
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MapKeyJoinColumn.table

that contains the foreign key column. If the join is for a map key for an element collection, the foreign key column is in the collection table for the map value. If the join is for a map key for a ManyToMany entity relationship or for a OneToMany entity relationship using a join table, the foreign
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correlate(parentJoin)

Method javax.persistence.criteria.Subquery Join<X,Y> correlate( Join<X,Y> parentJoin ) Create a subquery join object correlated to a join object of the enclosing query. Parameters: parentJoin - join object of the containing query Returns: subquery join Since: JPA 2.0
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MapKeyJoinColumn.name

of the foreign key column for the map key. The table in which it is found depends upon the context. If the join ... for the map value. If the join is for a map key for a ManyToMany entity relationship or for a OneToMany entity relationship using a join table, the foreign key column is in a join table. If the join
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JoinColumn.table

of the applicable entity. Default: If the join is for a OneToOne or ManyToOne mapping using a foreign key mapping strategy, the name of the table of the source entity or embeddable. If the join ... of the target entity. If the join is for a ManyToMany mapping or for a OneToOne or bidirectional
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javax.persistence.PessimisticLockScope

that are contained in join tables will be locked if the javax.persistence.lock.scope property is specified ... , element collections and relationships owned by the entity that are contained in join tables ... only the rows in the join table or collection table for that relationship or collection. This means
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fetch(attribute, jt)

Method javax.persistence.criteria.FetchParent Fetch<X,Y> fetch( PluralAttribute<?,?,Y> attribute, JoinType jt ) Create a fetch join to the specified collection-valued attribute using the given join type. Parameters: attribute - target of the join jt - join type Returns: the resulting join Since: JPA 2.0
0

javax.jdo.annotations.Element

key constraint exists on the column or columns associated with this join. Generate or assume a foreign key constraint exists on the column or columns associated with this join. Specify "true" or ... serialized Whether the element is to be stored serialized (into a join table) Whether the element

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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