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Is ObjectDB better than Object Relational Mapping (ORM)?

As noted above, using ObjectDB instead of a relational database and ORM combination is easier and leads to better performance. ORM tools, however, are very useful where the use of a relational ... a JPA ORM provider (Hibernate, TopLink, EclipseLink or DataNucleus) to access relational databases when necessary - with exactly the same code.

JPA Annotations for Mapping (ORM)

Reference (JavaDoc) of JPA 2 ORM annotations.

How to package orm.xml when using EJB in WAR?

Hi, I have database utility classes in one project, the id's use sequences declared in an orm.xml ... > and the persistence.xml references this orm.xml : <persistence-unit name="OBJECT_DB_LOCAL_PU ... >/META-INF/orm.xml</mapping-file>         <properties>             <property name="javax.persistence

JDO sequences from ORM file

.orm file, where X is a value passed to the PersistenceManagerFactory as the value of property "mapping ... seeing it. Is this supported and if so what could I be doing wrong? <orm>     <package name="com.spiffymap.model">         <sequence name="UserSequence" strategy="TABLE"/>     </package>  </orm

JPA Lifecycle Events

="http://java.sun.com/xml/ns/persistence/orm" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence/orm http://java.sun.com/xml/ns/persistence/orm_1_0.xsd" version="1.0"> <persistence-unit-metadata> <persistence-unit-defaults

JPA Entity Fields

of these annotations, so they are useful only for classes that are also in use with an ORM JPA ... , since it requires running queries. Inverse fields are essential for collection fields when using ORM JPA ... class hierarchy is sufficient because a version field is inherited by subclasses. Unlike ORM JPA

JDO Annotations for Mapping (ORM)

All about JDO Annotations for Mapping (ORM) in Java/JPA database - explanations, examples, references, links and related information.


Static Field javax.jdo.Constants String ORM_XSD_NS The standard JDO object-repository mapping schema namespace. Constant value is http://java.sun.com/xml/ns/jdo/orm. Since: JDO 2.1


Static Field javax.jdo.Constants String ORM_XSD_RESOURCE The name of the resource for the XML schema of the standard JDO object-relational mapping metadata file. Since: JDO 2.1


Static Field javax.jdo.Constants String ORM_DTD_RESOURCE The name of the resource for the DTD of the standard JDO object-relational mapping metadata file. 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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