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34

Attribute.PersistentAttributeType.ONE_TO_ONE

Enum Constant javax.persistence.metamodel.Attribute.PersistentAttributeType ONE_TO_ONE One-to-one association Since: JPA 2.0
34

GenerationType.TABLE

Enum Constant javax.persistence.GenerationType TABLE Indicates that the persistence provider must assign primary keys for the entity using an underlying database table to ensure uniqueness. Since: JPA 1.0
34

Attribute.PersistentAttributeType.ONE_TO_MANY

Enum Constant javax.persistence.metamodel.Attribute.PersistentAttributeType ONE_TO_MANY One-to-many association Since: JPA 2.0
34

GenerationType.SEQUENCE

Enum Constant javax.persistence.GenerationType SEQUENCE Indicates that the persistence provider must assign primary keys for the entity using a database sequence. Since: JPA 1.0
34

Bindable.BindableType.SINGULAR_ATTRIBUTE

Enum Constant javax.persistence.metamodel.Bindable.BindableType SINGULAR_ATTRIBUTE Single-valued attribute type Since: JPA 2.0
34

Bindable.BindableType.PLURAL_ATTRIBUTE

Enum Constant javax.persistence.metamodel.Bindable.BindableType PLURAL_ATTRIBUTE Multi-valued attribute type Since: JPA 2.0
34

AccessType.PROPERTY

Enum Constant javax.persistence.AccessType PROPERTY Property-based access is used. Since: JPA 2.0
34

AccessType.FIELD

Enum Constant javax.persistence.AccessType FIELD Field-based access is used. Since: JPA 2.0
3

NullValue.EXCEPTION

Enum Constant javax.jdo.annotations.NullValue EXCEPTION Since: JDO 2.1
3

NullValue.DEFAULT

Enum Constant javax.jdo.annotations.NullValue DEFAULT Since: JDO 2.1

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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Which JPA is Faster?

 

See a comparison of Hibernate, EclipseLink, OpenJPA, DataNucleus, MySQL, PostgreSQL, Derby, HSQLDB, DB4O by Versant, H2 Database, SQLite and ObjectDB

in the JPA Benchmark.

Copyright © 2003, 2010, 2024  ObjectDB Software, all rights reserved. The JPA API Reference Documentation (JavaDoc) on this website is derived with some adjustments from the open source JPA 2 RI (EclipseLink) and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0. The JDO API Reference Documentation (JavaDoc) on this website is derived with some adjustments from the JDO 2.2 API and is available under the terms of the Apache License, v. 2.0. Images on this website are available under these licecnes. Documentation on this website explains how to use JPA in the context of the ObjectDB Object Database but mostly relevant also for ORM JPA implementations, such as Hibernate (and HQL), EclipseLink, TopLink, OpenJPA and DataNucleus. ObjectDB is not an ORM JPA implementation but an Object Database (ODBMS) for Java with built in JPA 2 support.