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Method javax.persistence.metamodel.IdentifiableType boolean hasSingleIdAttribute() Whether the identifiable type has a single id attribute. Returns true for a simple id or embedded id; returns false for an idclass. Returns: boolean indicating whether the identifiable type has a single id attribute Since: JPA 2.0


Method javax.persistence.criteria.Subquery Subquery<T> having( Expression<Boolean> restriction ) Specify a restriction over the groups of the subquery. Replaces the previous having restriction(s ... . Parameters: restriction - a simple or compound boolean expression Returns: the modified subquery Since: JPA 2.0


. Returns: the Java type of the tuple element Since: JPA 2.0 boolean isCompoundSelection ... . Returns: boolean indicating whether the selection is a compound selection Since: JPA 2.0


Method javax.persistence.EntityManagerFactory boolean isOpen() Indicates whether the factory is open. Returns true until the factory has been closed. Returns: boolean indicating whether the factory is open Since: JPA 1.0


testing for membership Since: JPA 2.0 boolean isCompoundSelection() Whether the selection item is a compound selection. Whether the selection item is a compound selection. Returns: boolean indicating


Method javax.jdo.PersistenceManagerFactory boolean getCopyOnAttach() Gets the default copyOnAttach setting for all PersistenceManager instances obtained from this factory. Returns: the copyOnAttach setting. Since: JDO 2.1 See Also: setCopyOnAttach(boolean)


Method javax.jdo.PersistenceManagerFactory boolean getDetachAllOnCommit() Gets the detachAllOnCommit setting. Returns: the default detachAllOnCommit setting. Since: JDO 2.0 See Also: setDetachAllOnCommit(boolean)

makeTransientAll(pcs, useFetchPlan)

Method javax.jdo.PersistenceManager void makeTransientAll( Object[] pcs, boolean useFetchPlan ) Make instances transient, removing them from management by this PersistenceManager. If the useFetchPlan ... to determine which fields to load and which instances to make transient Since: JDO 2.0 See Also: makeTransientAll(boolean,Object...)


.2 boolean equals(Object obj) Determine if the other object represents the same object id. Determine ... if both objects represent the same object id Since: JDO 1.0 boolean equals(Object obj) Check

getBooleanField(pc, field, currentValue)

Method javax.jdo.spi.StateManager boolean getBooleanField( PersistenceCapable pc, int field, boolean currentValue ) Return the value for the field. Parameters: pc - the calling PersistenceCapable instance field - the field number currentValue - the current value of the field Returns: the new value for the field Since: JDO 1.0

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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