Java 持久層框架 DataNucleus Access Platform

DataNucleus Access Platform 是一個兼容各種標準的 Java 數據持久化框架，完全兼容 JDO1, JDO2, JDO2.1, JDO2.2, JDO2.3, 和 JPA1 等 Java 標準。提供一個基于 REST 的API。通過它可以訪問所有常見的數據庫服務器，還包括 LDAP, NeoDatis, JSON, Excel/ODF spreadsheets, XML, BigTable, 和 HADOOP 數據庫等.

DataNucleus Access Platform 3.0.6 ("Newton") 發布了，這是一個 Java 的持久層框架，支持各種關系數據庫、db4o、LDAP、XML 和 Excel。

3.0.6 版本主要改進如下：

• Fix to clear/removeAll methods of backed SCOs for non-RDBMS datastores (e.g GAE)
• Fix to embedded inheritance mapping treatment of members
• Add code for generic type converter, compatible with JPA2.1 converters
• Fix to JPA @EmbeddedId when used in a relation
• Add validation of "jdbc-type" to only accept valid values
• Allow for custom scanning for annotated classes (Ales Justin)
• JDO3.1 : add check for invalid javax.jdo persistence properties
• JDO3.1 : add security check on PMF.getManagedClasses calls
• JPA extension : add annotation to support specification of column "position"
• JPA2.1 : support stored procedure API
• RDBMS : add support for serialisation of query results
• RDBMS : fix use of JDOQL cast/instanceof for embedded inherited fields
• MongoDB : support nondurable identity
• Excel : support nondurable identity
• Excel : support embedded PK fields
• Excel : drop support for extension "sheet" and use standard only now
• ODF : support embedded PK fields
• ODF : drop support for extension "sheet" and use standard only now
• HBase : fix reuse of HTable so we can use HBase 0.90.1+
• HBase : dont allow table creation/validation if persistence properties not set