Java Data Objects

Name

JDOHelper

Synopsis

This helper class provides applications with several utility methods. It provides methods to perform the following functions:

• Construct a PersistenceManagerFactory instance via a Properties object

• Interrogate the lifecycle state of an instance

• Get the object identifier of an instance

• Mark a field of an instance as modified

public class JDOHelper { 
    public                      JDOHelper(  );
    public static Object        getObjectId(Object obj); 
    public static PersistenceManager
                                getPersistenceManager(Object obj);
    public static PersistenceManagerFactory
                                getPersistenceManagerFactory(Properties props);
    public static PersistenceManagerFactory
                                getPersistenceManagerFactory(Properties props,
                                           ClassLoader cl);
    public static Object        getTransactionalObjectId(Object obj);
    public static boolean       isDeleted(Object obj);
    public static boolean       isDirty(Object obj);
    public static boolean       isNew(Object obj);
    public static boolean       isPersistent(Object obj);
    public static boolean       isTransactional(Object obj);
    public static void          makeDirty(Object obj, String fieldName);
}