About mapping
JPA Annotations for Mapping (ORM)
Reference (JavaDoc) of JPA 2 ORM annotations.... The following JPA annotations and enums are designated for mapping a JPA object model to a relational database, and are not required by ...
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 database is mandatory (e.g. as a result of a customer reques ...
JPA Persistable Types
Explains how JPA manages types, including entity classes, embeddable classes, primitive types, wrappers, string, date, enum, collections and maps.... JPA enum Type used to indicate a specific mapping of java.util.Date or java.util.Calendar. See JavaDoc Reference ... JPA enum Type used to indicate a specific mapping of java.util.Date or java.util.Calendar. See JavaDoc Reference ...
JPA Persistence Unit
Explains how to define a JPA persistence unit in the persistence.xml file.... topics: persistence.xml XML Mapping Metadata Managed Persistable Classes ... </provider > <mapping-file > META-INF/mappingFile.xml </mapping-file > <jar-file > packedEntity.jar ...
Can I use ObjectDB to access a relational database?
... Persistence API (JPA) you will need an Object Relational Mapping (ORM) tool, such as Hibernate, TopLink, EclipseLink, Open JPA or ...
JPA Entity Fields
Explains how to define and use primary keys in JPA, including composite and embedded primary keys.... JPA annotation The simplest type of mapping to a database column. See JavaDoc Reference Page... - for ... JPA annotation The simplest type of mapping to a database column. See JavaDoc Reference Page... is ... JPA annotation The simplest type of mapping to a database column. See JavaDoc Reference Page... ( ...
Collections in JPQL and Criteria Queries
Shows how collections and maps can be used in JPQL queries. Collections may appear in JPQL queries: as parameters - when collections are assigned as arguments. as path expressions - in navigation to persistent collection fields. This page covers the ...
createEntityManager(map)
Create a new application-managed EntityManager with the specified Map of properties.(Method of javax.persistence.EntityManagerFactory)
javax.persistence.AssociationOverride
Used to override a mapping for an entity relationship.(Annotation of JPA)
getPersistenceManagerFactory(overrides, name, resourceLoader, pmfLoader)
Returns a PersistenceManagerFactory configured based on the properties stored in the resource at name, or, if not found, returns a PersistenceManagerFactory with the given name or, if not found, returns a javax.persistence.EntityManagerFactory cast to a PersistenceManagerFactory.(Static Method of javax.jdo.JDOHelper)
