Fast Object Database for Java - with JPA/JDO support

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114

FROM clause (JPQL / Criteria API)

, 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 iteration over specified collections of objects. The following query uses one range variable and one join
86

javax.persistence.criteria.Join

javax.persistence.criteria Interface Join Superinterfaces: Expression, FetchParentjoin 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 alias(String name
64

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
57

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
56

join(attribute, jt)

Method javax.persistence.criteria.From Join join( SingularAttribute 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
56

join(attributeName, jt)

Method javax.persistence.criteria.From Join 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
56

join(collection, jt)

Method javax.persistence.criteria.From CollectionJoin join( CollectionAttribute 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
56

Joins.value

Annotation Element javax.jdo.annotations.Joins Join[] value The join definitions used for the mapping of this type. Joins for secondary tables are usually defined at the type level and not the field or property level. This allows multiple fields and properties to share the same join definition
56

join(list, jt)

Method javax.persistence.criteria.From ListJoin join( ListAttribute 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
56

join(map, jt)

Method javax.persistence.criteria.From MapJoin join( MapAttribute 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

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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