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javax.persistence Annotation ExcludeDefaultListeners Target: Classes Specifies that the invocation of default listeners is to be excluded for the entity class (or mapped superclass) and its subclasses. Since: JPA 1.0 Learn how to define and use entity listeners in Chapter 3 of the ObjectDB/JPA


javax.persistence.criteria Interface Path<X> Superinterfaces: Expression<X>, Selection<X>, TupleElement<X> Subinterfaces: CollectionJoin, From, Join, ListJoin, MapJoin, PluralJoin, Root, SetJoin Represents a simple or compound attribute path from a bound type or collection, and is a "primitive


javax.persistence.criteria Interface CollectionJoin<Z,E> Superinterfaces: Expression<E>, FetchParent<Z,E>, From<Z,E>, Join<Z,E>, Path<E>, PluralJoin<Z,Collection<E>,E>, Selection<E>, TupleElement<E> The CollectionJoin interface is the type of the result of joining to a collection


javax.persistence Annotation UniqueConstraint Target: Specifies that a unique constraint is to be included in the generated DDL for a primary or secondary table. Example: @Entity @Table( name="EMPLOYEE", uniqueConstraints= @UniqueConstraint(columnNames={"EMP_ID


javax.persistence Annotation PrimaryKeyJoinColumns Target: Classes and fields (including property get methods) Groups PrimaryKeyJoinColumn annotations. It is used to map composite foreign keys. Example: ValuedCustomer subclass @Entity @Table(name="VCUST") @DiscriminatorValue("VCUST


javax.persistence Annotation PrePersist Target: Callback methods Is used to specify callback methods for the corresponding lifecycle event. This annotation may be applied to methods of an entity class, a mapped superclass, or a callback listener class. Since: JPA 1.0 Learn how to define and use JPA


javax.persistence Annotation PrimaryKeyJoinColumn Target: Classes and fields (including property get methods) Specifies a primary key column that is used as a foreign key to join to another table. It is used to join the primary table of an entity subclass in the JOINED mapping strategy


javax.persistence Annotation PersistenceUnits Target: Classes Declares one or more PersistenceUnit annotations. Since: JPA 1.0 PersistenceUnit[] value (Required) One or more PersistenceUnit annotations. (Required) One or more PersistenceUnit annotations. Since: JPA 1.0


javax.persistence.criteria Interface Predicate Superinterfaces: Expression<Boolean>, Selection<Boolean>, TupleElement<Boolean> Subinterfaces: In The type of a simple or compound predicate: a conjunction or disjunction of restrictions. A simple predicate is considered to be a conjunction


javax.persistence.criteria Interface Root<X> Superinterfaces: Expression<X>, FetchParent<X,X>, From<X,X>, Path<X>, Selection<X>, TupleElement<X> A root type in the from clause. Query roots always reference entities. Since: JPA 2.0 Learn how to use JPA criteria API's Root in Chapter 4

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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