Datanucleus Access Platform 3.1.2 ("Kepler") 最近发布。

Datanucleus Access Platform是一个基于JAVA的数据持久化框架，类似于Hibernate、EclipseLink之类的框架，支持多种关系数据库系统，以及Neo4j、MongoDB等Nosql数据库，还有LDAP、XML和Excel等。

3.1.2版主要的改进包括：

Fix to lookup of object inheritance level in some corner-case situations Provide TypeConverters for persisting Serializable object as byte[] or base-64 encoded string Fix clone of JPQL query so that "from" is cloned Log which fields (numbers) are being attached Complete TODO in FetchPlan code for dynamic fetch groups from PM JDO : Fix bug in map key/value Metadata handling introduced in 3.1.1 JPA : Fix bug in use of Query.getParameters when used by Spring Data JPA XML : Fix to class loading in relation lookup Neo4j : Fix to some JPQL queries causing exception Neo4j : Fix to lazy load iterator for empty result condition Neo4j : Fix to stackoverflow with bidirectional relation retrieval Neo4j : Support persistence of arrays Neo4j : Support persistence of serialised fields Neo4j : Support "increment" value generator MongoDB : Support for capped DB collections (size limit on objects of a type) MongoDB : Fix to replica-set URL string parsing RDBMS : Extend support for stored procedure parameters to other types VarIoUs other bug fixes and minor improvements