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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 ... development and better performance and use a JPA ORM provider (Hibernate, TopLink, EclipseLink or DataNucleus

JPA Annotations for Mapping (ORM)

The following JPA annotations and enums are designated for mapping a JPA object model to a relational database, and are not required by ObjectDB: orm"> ObjectDB silently ignores all the above annotations.

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

sequences declared in an orm.xml file for example: <entity class="com.x ... ;   </entity> and the persistence.xml references this orm.xml : orm.xml</mapping

JDO sequences from ORM file

this is done with a package-X.orm file, where X is a value passed to the PersistenceManagerFactory as the value ... > <orm>     <package name="com.spiffymap ... ="TABLE"/>     </package>  </orm> spiffy Jonathan

Is named-query supported in orm.xml

I prefer to keep custom JPQL named queries in an external file, e.g. orm.xml ... /persistence/orm":entity, "http://java.sun.com/xml/ns/persistence/orm":embeddable}' is expected.ORM schema

JPA Lifecycle Events

> <entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm ... /persistence/orm http://java.sun.com/xml/ns/persistence/orm_1_0.xsd" version="1.0"> < ... file has to be located either in the default location, META-INF/orm.xml, or in

JDO Annotations for Mapping (ORM)

The following JDO annotations and enums are designated for mapping a JDO object model to a relational database, and are not required by ObjectDB: orm"> ObjectDB silently ignores all the above annotations.

Constants.ORM_XSD_NS

">javax.jdo.ConstantsString ORM_XSD_NS The standard JDO object-repository mapping schema namespace. Constant value is http://java.sun.com/xml/ns/jdo/orm

Constants.ORM_XSD_RESOURCE

Static Field javax.jdo.ConstantsString ORM_XSD_RESOURCE The name of the resource

Constants.ORM_DTD_RESOURCE

Static Field javax.jdo.ConstantsString ORM_DTD_RESOURCE The name of the resource