DataNucleus Access Platform 2.0 M4 Released

December 7th 2009- DataNucleus Access Platform 2.0 ("Bohr") Milestone 4 is released. DataNucleus Access Platform provides persistence and retrieval of Java objects to/from a wide range of datastores including RDBMS, db4o, LDAP, XML, and Excel. Version 2.0 Milestone 4 includes the following changes

  • Require use of a JPA2 jar when used for JPA persistence
  • Change handling of JDO @PrimaryKey to not require @Persistent for non-default persistent fields
  • Change generic compilation of subqueries, particularly for JPQL, to allow for multi-level primary expression
  • Change generic compilation of JPQL "LOCATE" to handle multi-level primary expressions
  • Fix to JDO PersistenceManagerProxy for named queries (typo)
  • Provide framework for bulk object retrieval (available to datastore-specific plugins)
  • Fix handling of query parameters to allow for use of parameters in subqueries
  • Respect "RetainValues" setting for objects that are deleted (so field values can be retained after the transaction commits, and the object is deleted).
  • Add support for PMF/EMF singleton pattern, via persistence property
  • Add support for case-insensitive persistence properties (previously all were case sensitive)
  • JPA2 : Support for "Metamodel" API
  • JPA2 : Support for TypedQuery
  • JPA2 : Support for Bean Validation
  • JPA : Fix to runtime enhancer
  • Enhancer : add ability to turn on/off capabilities
  • Enhancer : add ability to generate PK classes (including composite)
  • Enhancer : add ability to turn off generation of default constructor
  • Enhancer : add short form of "persistenceUnit" argument
  • RDBMS : Change to use "JPQL2" implementation by default since it passes the JPA1 TCK
  • RDBMS : Fix to JDOQL2/JPQL2 for case where multiple classes share a table and use a discriminator
  • RDBMS : Support for embedded fields in JDOQL2/JPQL2
  • RDBMS : Query range not working for Oracle now fixed
  • RDBMS : Fix to FROM join in JPQL2 for second and subsequent joins
  • RDBMS : Add support to JPQL2 for subquery FROM clauses with multiple joins
  • RDBMS : Fix support in JPQL2 for "COUNT (DISTINCT ...)"
  • RDBMS : Support for JPA2 "TYPE" in JPQL2 implementation
  • RDBMS : Support for "StringExpression == EnumLiteral" in JDOQL2/JPQL2
  • RDBMS : Change to "persistenceUnit" option of SchemaTool to allow short form
  • RDBMS : Fix for read of null BLOB with Oracle
  • Spatial : fix to M2 dependencies to make some optional
  • HBase : add security handling to cater for issues in HBase itself
  • Maven2 plugin : Support for enhancement generating PKs, and turn on/off default constructor

This release is downloadable under an Apache 2 license from the DataNucleus community site.