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软件编程 DataNucleus

持久层框架 DataNucleus Access Platform 3.0.7

作者 fmms 2012-02-10 22:48:17

DataNucleus Access Platform 是一个兼容各种标准的 Java 数据持久化框架，完全兼容 JDO1, JDO2, JDO2.1, JDO2.2, JDO2.3, 和 JPA1 等 Java 标准。提供一个基于 REST 的API。通过它可以访问所有常见的数据库服务器，还包括 LDAP, NeoDatis, JSON, Excel/ODF spreadsheets, XML, BigTable, 和 HADOOP 数据库等.

DataNucleus 3.0.7 主要改进内容包括：

  • Fix to use of persistence property "datanucleus.storeManagerType"
  • JPA : Support for JPA2.1 Type Convertors
  • JPA : Fix to EM.find to also work for datastore-identity
  • JPA : Update to detection of 1-N UNI FK relations to avoid the need for JPA 'level' persistence property
  • JPA : Add numeric conversion capabilities to EM.find key argument.
  • JDO : Fix to duplicate close of query results when using Extent on non-RDBMS datastores
  • Fix to load of metadata for persistence unit when persistable inner classes present
  • Fix to instantiation of object from identity when root class is abstract and using single-field id
  • RDBMS : Fix to JPQL "INDEX" SQL generation for join table case
  • JSON, HBase, MongoDB, Excel, ODF, RDBMS : fix to version of core usable to prohibit v3.1

下载地址：DataNucleus community site.

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