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javax.jdo.annotations.Key

javax.jdo.annotations Annotation Key Target: Fields (including property get methods) Annotation for the key of a map relation. Corresponds to the xml element "key". Since: JDO 2.1 String column Name ... of the column to store the key in Default value: "" Since: JDO 2.1 Column[] columns The column(s) for the key
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javax.jdo.JDOException

javax.jdo Exception JDOException java.lang.Object java.lang.Throwable java.lang.Exception java.lang.RuntimeException javax.jdo.JDOException Implemented Interfaces: Serializable Subclasses: JDOCanRetryException, JDOFatalException This is the root of all JDO
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javax.jdo.identity.IntIdentity

javax.jdo.identity Class IntIdentity java.lang.Object javax.jdo.identity.SingleFieldIdentity javax.jdo.identity.IntIdentity Implemented Interfaces: Externalizable, Serializable, Comparable This class is for identity with a single int field. Since: JDO 1.0 IntIdentity() Constructor
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javax.jdo.identity.ByteIdentity

javax.jdo.identity Class ByteIdentity java.lang.Object javax.jdo.identity.SingleFieldIdentity javax.jdo.identity.ByteIdentity Implemented Interfaces: Externalizable, Serializable, Comparable This class is for identity with a single byte field. Since: JDO 1.0 ByteIdentity() Constructor
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javax.jdo.identity.ShortIdentity

javax.jdo.identity Class ShortIdentity java.lang.Object javax.jdo.identity.SingleFieldIdentity javax.jdo.identity.ShortIdentity Implemented Interfaces: Externalizable, Serializable, Comparable This class is for identity with a single short field. Since: JDO 1.0 ShortIdentity
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javax.jdo.datastore.DataStoreCache

javax.jdo.datastore Interface DataStoreCache Implementing Classes: EmptyDataStoreCache Many JDO ... of the cache by knowledgeable applications. This interface standardizes this behavior. Since: JDO 2.0 ... . Since: JDO 2.0 void evictAll() Evict the parameter instances from the second-level cache. Evict
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javax.jdo.ObjectState

javax.jdo Enum ObjectState java.lang.Object java.lang.Enum<javax.jdo.ObjectState> javax.jdo.ObjectState Implemented Interfaces: Serializable, Comparable<ObjectState> This class defines the object states for JDO instances. Since: JDO 1.0 ObjectState DETACHED_CLEAN Since: JDO 1.0
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javax.jdo.identity.LongIdentity

javax.jdo.identity Class LongIdentity java.lang.Object javax.jdo.identity.SingleFieldIdentity javax.jdo.identity.LongIdentity Implemented Interfaces: Externalizable, Serializable, Comparable This class is for identity with a single long field. Since: JDO 1.0 LongIdentity() Constructor
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javax.jdo.identity.CharIdentity

javax.jdo.identity Class CharIdentity java.lang.Object javax.jdo.identity.SingleFieldIdentity javax.jdo.identity.CharIdentity Implemented Interfaces: Externalizable, Serializable, Comparable This class is for identity with a single character field. Since: JDO 1.0 CharIdentity
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javax.jdo.InstanceCallbacks

javax.jdo Interface InstanceCallbacks Superinterfaces: ClearCallback, DeleteCallback, LoadCallback ... implements this interface. For JDO 2.0, InstanceCallbacks has been refactored to extend ... of the other callbacks. For backward compatibility with JDO 1.0, the InstanceCallbacks interface is preserved

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

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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.