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getObjectId(pc)

implementation to locate a persistent instance with the same data store identity. If the JDO identity is managed ... the application or the data store, then the ObjectId returned is only valid within the current transaction
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getExtent(persistenceCapableClass, subclasses)

Method javax.jdo.PersistenceManager Extent<T> getExtent( Class<T> persistenceCapableClass, boolean subclasses ) The PersistenceManager manages a collection of instances in the data store based on the class of the instances. This method returns an Extent of instances in the data store
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getConnectionUserName()

Method javax.jdo.PersistenceManagerFactory String getConnectionUserName() Get the user name for the data store connection. Returns: the user name for the data store connection. Since: JDO 1.0
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getConnectionFactory2Name()

Method javax.jdo.PersistenceManagerFactory String getConnectionFactory2Name() Get the name for the second data store connection factory. This is needed for managed environments to get nontransactional connections for optimistic transactions. Returns: the name of the data store connection factory. Since: JDO 1.0
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getConnectionFactory2()

Method javax.jdo.PersistenceManagerFactory Object getConnectionFactory2() Get the second data store connection factory. This is needed for managed environments to get nontransactional connections for optimistic transactions. Returns: the data store connection factory. Since: JDO 1.0
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getConnectionURL()

Method javax.jdo.PersistenceManagerFactory String getConnectionURL() Get the URL for the data store connection. Returns: the URL for the data store connection. Since: JDO 1.0
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getConnectionFactoryName()

Method javax.jdo.PersistenceManagerFactory String getConnectionFactoryName() Get the name for the data store connection factory. Returns: the name of the data store connection factory. Since: JDO 1.0
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getConnectionFactory()

Method javax.jdo.PersistenceManagerFactory Object getConnectionFactory() Get the data store connection factory. Returns: the data store connection factory. Since: JDO 1.0
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getConnectionDriverName()

Method javax.jdo.PersistenceManagerFactory String getConnectionDriverName() Get the driver name for the data store connection. Returns: the driver name for the data store connection. Since: JDO 1.0
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Value.mappedBy

Annotation Element javax.jdo.annotations.Value String mappedBy Name of a member in the key class where this value is stored. Returns: the name of a member in the key class where this value is stored Default value: "" 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.