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javax.persistence.criteria.Join

javax.persistence.criteria Interface Join<Z,X> Superinterfaces: Expression<X>, FetchParent<Z,X ... , PluralJoin, SetJoin A join to an entity, embeddable, or basic type. Since: JPA 2.0 Learn how to use JPA criteria API's Join in Chapter 4 of the ObjectDB/JPA manual. Selection<X> alias(String name
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FROM clause (JPQL / Criteria API)

phase, a full iteration over the Cartesian product is avoided. [INNER] JOIN As discussed above, range ... an additional type of identification variable, a join variable, which represent a more limited ... and one join variable: SELECT c1, c2 FROM Country c1 INNER JOIN c1.neighbors c2 In JPQL, JOIN
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join(attribute, jt)

Method javax.persistence.criteria.From Join<X,Y> join( SingularAttribute<?,Y> attribute, JoinType jt ) Create a join to the specified single-valued attribute using the given join type. Parameters: attribute - target of the join jt - join type Returns: the resulting join Since: JPA 2.0
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join(attributeName, jt)

Method javax.persistence.criteria.From Join<X,Y> join( String attributeName, JoinType jt ) Create a join to the specified attribute using the given join type. Parameters: attributeName - name of the attribute for the target of the join jt - join type Returns: the resulting join Throws
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join(collection, jt)

Method javax.persistence.criteria.From CollectionJoin<X,Y> join( CollectionAttribute<?,Y> collection, JoinType jt ) Create a join to the specified Collection-valued attribute using the given join type. Parameters: collection - target of the join jt - join type Returns: the resulting join Since: JPA 2.0
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join(set, jt)

Method javax.persistence.criteria.From SetJoin<X,Y> join( SetAttribute<?,Y> set, JoinType jt ) Create a join to the specified Set-valued attribute using the given join type. Parameters: set - target of the join jt - join type Returns: the resulting join Since: JPA 2.0
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join(list, jt)

Method javax.persistence.criteria.From ListJoin<X,Y> join( ListAttribute<?,Y> list, JoinType jt ) Create a join to the specified List-valued attribute using the given join type. Parameters: list - target of the join jt - join type Returns: the resulting join Since: JPA 2.0
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join(map, jt)

Method javax.persistence.criteria.From MapJoin<X,K,V> join( MapAttribute<?,K,V> map, JoinType jt ) Create a join to the specified Map-valued attribute using the given join type. Parameters: map - target of the join jt - join type Returns: the resulting join Since: JPA 2.0
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javax.jdo.annotations.Join

javax.jdo.annotations Annotation Join Target: Classes and fields (including property get methods) Annotation for the join of a relation. Corresponds to the xml element "join". Since: JDO 2.1 String column Name of the column in the join table. Name of the column in the join table. Returns: the name
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javax.jdo.annotations.Joins

javax.jdo.annotations Annotation Joins Target: Classes Annotation for a group of joins. Since: JDO 2.1 Join[] value The join definitions used for the mapping of this type. The join definitions used for the mapping of this type. Joins for secondary tables are usually defined at the type level

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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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