DataNucleus Access Platform v2.2.2 Publish compliant Java persistence engines

DataNucleus Access platform is a standard Java persistence engine. It fully conforms to the jdo1,jdo2,jdo2.1 and JPA1 Java standards. In addition, it follows the OGC Simple element specification (Simplicity Feature http://www.aliyun.com/zixun/aggregation/29909.html ">specification") for the persistence of geospatial data types. DataNucleus supports all current popular RDBMS and db4o,ldap,excel files, XML databases.

DataNucleus Access Platform 2.2.2 ("Geiger") is released. DataNucleus Access Platform provides persistence and retrieval to Java objects to/from a wide range of datastores including RDBMS, db4o, LDAP, XML, and Excel. Version 2.2.2 Recursively the following changes over 2.2.1

· ADD support for associated value mechanism for 1-N maps to reduce the number of SQL statements used (been keyword for 1-n lists/s ETS for 2 yrs)
· Bug fix to metadata handling for embedded fields, when embedded field definition not provided
· Jpa:bug fix to query compilation of JPQL ' not in (subquery) '
· Jpa:support for @MapKeyEnumerated to define the type of column
· Jpa:bug fix to 處理 the <column> within unique-constraint in XML metadata
· Jpa:support For ListBox inherited @MappedSuperclass
· Rdbms:bug fix to race condition in statement batching (Gerd Behrmann)
· Rdbms:support for use ' count () ' Size method while range specified on query
· Rdbms:fix to Derby 10.6 change in handling of boolean/integer comparisons
· Rdbms:bug fix to Postgresql handling of index generation, now omitting the schema name
· Other minor cleanups