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34

FetchType.LAZY

Enum Constant javax.persistence.FetchType LAZY Defines that data can be lazily fetched. Since: JPA 1.0
34

FetchType.EAGER

Enum Constant javax.persistence.FetchType EAGER Defines that data must be eagerly fetched. Since: JPA 1.0
34

JoinType.LEFT

Enum Constant javax.persistence.criteria.JoinType LEFT Left outer join. Since: JPA 2.0
34

JoinType.INNER

Enum Constant javax.persistence.criteria.JoinType INNER Inner join. Since: JPA 2.0
34

CascadeType.REFRESH

Enum Constant javax.persistence.CascadeType REFRESH Cascade refresh operation Since: JPA 1.0
3

IdGeneratorStrategy.UUIDHEX

Enum Constant javax.jdo.annotations.IdGeneratorStrategy UUIDHEX Since: JDO 2.1
3

IdGeneratorStrategy.UNSPECIFIED

Enum Constant javax.jdo.annotations.IdGeneratorStrategy UNSPECIFIED Since: JDO 2.1
3

IdGeneratorStrategy.INCREMENT

Enum Constant javax.jdo.annotations.IdGeneratorStrategy INCREMENT Since: JDO 2.1
3

IdGeneratorStrategy.IDENTITY

Enum Constant javax.jdo.annotations.IdGeneratorStrategy IDENTITY Since: JDO 2.1
3

IdGeneratorStrategy.SEQUENCE

Enum Constant javax.jdo.annotations.IdGeneratorStrategy SEQUENCE 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.