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2

distinct(distinct)

Method javax.persistence.criteria.Subquery Subquery<T> distinct( boolean distinct ) Specify whether duplicate query results will be eliminated. A true value will cause duplicates to be eliminated. A false value will cause duplicates to be retained. If distinct has not been specified, duplicate
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OneToOne.orphanRemoval

Annotation Element javax.persistence.OneToOne boolean orphanRemoval (Optional) Whether to apply the remove operation to entities that have been removed from the relationship and to cascade the remove operation to those entities. Default value: false Since: JPA 2.0
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JoinColumn.unique

specify this for a join column that corresponds to a primary key that is part of a foreign key. Default value: false Since: JPA 1.0
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OneToOne.optional

Annotation Element javax.persistence.OneToOne boolean optional (Optional) Whether the association is optional. If set to false then a non-null relationship must always exist. Default value: true Since: JPA 1.0
2

distinct(distinct)

Method javax.persistence.criteria.AbstractQuery AbstractQuery<T> distinct( boolean distinct ) Specify whether duplicate query results will be eliminated. A true value will cause duplicates to be eliminated. A false value will cause duplicates to be retained. If distinct has not been specified
2

MapKeyJoinColumn.unique

Annotation Element javax.persistence.MapKeyJoinColumn boolean unique (Optional) Whether the property is a unique key. This is a shortcut for the UniqueConstraint annotation at the table level and is useful for when the unique key constraint is only a single field. Default value: false Since: JPA 2.0
2

isLoaded(entity, attributeName)

Method javax.persistence.PersistenceUtil boolean isLoaded( Object entity, String attributeName ) Determine the load state of a given persistent attribute. Parameters: entity - entity containing the attribute attributeName - name of attribute whose load state is to be determined Returns: false
0

closeAll()

Method javax.jdo.Query void closeAll() Close all query results associated with this Query instance, and release all resources associated with them. The query results might have iterators open on them. Iterators associated with the query results are invalidated: they return false to hasNext() and throw NoSuchElementException to next(). Since: JDO 1.0
0

close(queryResult)

Method javax.jdo.Query void close( Object queryResult ) Close a query result and release any resources associated with it. The parameter is the return from execute(...) and might have iterators open on it. Iterators associated with the query result are invalidated: they return false to hasNext
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retrieve(pc, useFetchPlan)

is false, this method behaves exactly as the corresponding method without the useFetchPlan parameter

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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