Accessplatform v2.2.1 Publishing compliant Java Data Persistence framework

DataNucleus Access Platform is a compatible standard Java data Persistence Framework, fully compatible with JDO1, JDO2, JDO2.1, JDO2.2, JDO2.3, and JPA1 Java standards. Provides a REST based API. It allows access to all common database servers, including LDAP, Neodatis, JSON, http://www.aliyun.com/zixun/aggregation/16544.html ">excel/odf Spreadsheets, XML, BigTable, and HADOOP databases.

DataNucleus Access Platform 2.2.1 ("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 2.2.1 Recursively the following changes over 2.2.0.

· Support for JPQL extension functions ' MONTH ', ' Day ', ' year ', ' HOUR ', ' MINUTE ', ' SECOND '
· When embedding a persistable field, default to the metadata of the embedded class
· Jdo:fix to return type for AVG () in JDOQL to match JDO spec change
· Jpa:support attribute override for nested embedded
· Jpa:support XML "embedded" tag
· Rdbms:fix to retrieval the version on object in certain circumstances
· Rdbms:fix to Collection.contains check when containing a primitive
· Rdbms:add OSGi Importpackage of principal JDBC drivers
· Rdbms:better treatment of unmapped columns with null values
· Hbase:fix to retrieval when non-persistent fields a
· Hbase:support "native" (JDO)/"Auto" (JPA) value generation strategies
· Enhancer:set default API (JDO) when using annotation processor