DataNucleus Access Platform provides data persistence and retrieval to a range of data stores using a range of APIs.

DataNucleus Access Platform provides data persistence and retrieval to a range of data stores using a range of APIs, with a range of query languages.

The majority of competing software only caters for a single API and a single type of datastore. DataNucleus Access Platform is not just an ORM . It allows access to RDBMS just like other persistence software, but it also allows access to object-based datastores, or LDAP, or even documents! It is continually evolving. It also provides access via JDO or JPA APIs. It doesn't just stop there. You could define your persistence mapping using JDO (XML or annotations) and then persist using the JPA API. Or define your persistence mapping using JPA (XML or annotations) and then persist using the JDO API!. Flexibility.

· APIs Supported: JDO, JPA
· Datastores Supported: RDBMS, db4o, LDAP, Excel, XML, NeoDatis, JSON
· Query Languages: JDOQL, JPQL, SQL, db4o Native, NucleusSQL, NeoDatis Criteria

Requirements:

· Java Runtime Environment (JRE) 1.5 or later

What's New in This Release: [ read full changelog ]

· JDO persistence has been migrated to the forthcoming JDO2.2 standard.
· Support for JDO2.2 dynamic fetch groups has been added (this was previously a vendor extension).
· Generic query compilation support for chained method invocations was added.
· Support for dynamic RDBMS schema upgrades for 1-1 interface fields was added.
· Support for the use of datastore identity with Excel datastores was added.
· Support for cascade delete with NeoDatis datastores was added.
· A bug was fixed in cascade delete for db4o datastores.
· A bug was fixed for persistence/retrieval of object wrapper field values with Excel datastores.