8 | JDOHelper()Constructor javax.jdo.JDOHelper JDOHelper() Some applications might prefer to use instance methods instead of static methods. Since: JDO 2.1 |
6 | javax.jdo.JDOHelperjavax.jdo Class JDOHelper java.lang.Object javax.jdo.JDOHelper Implemented Interfaces ... ; and to get its associated PersistenceManager if it has one. Since: JDO 1.0 JDOHelper() Some applications ... methods instead of static methods. Since: JDO 2.1 JDOHelper getInstance() Return the singleton |
6 | [ODB1] Chapter 6 - Persistent Objects (useful when a PersistenceManager is unavailable): Object oid = JDOHelper.getObjectId(obj); JDO does ... = JDOHelper.getObjectId(obj) + '@' + obj.getClass(); In this case the object can be retrieved later ... The state of an object in a JDO application can be examined using five JDOHelper static methods |
6 | getInstance()Static Method javax.jdo.JDOHelper JDOHelper getInstance() Return the singleton instance of JDOHelper. This instance is thread-safe. Returns: the thread-safe singleton JDOHelper Since: JDO 2.1 |
6 | getPersistenceManagerFactory(overrides, name)Static Method javax.jdo.JDOHelper PersistenceManagerFactory getPersistenceManagerFactory( Map overrides, String name ) Returns a named PersistenceManagerFactory or persistence unit. Parameters: overrides - name - Since: JDO 2.1 See Also: getPersistenceManagerFactory(Map,String,ClassLoader,ClassLoader) |
6 | getPersistenceManagerFactory(name, resourceLoader, pmfLoader)Static Method javax.jdo.JDOHelper PersistenceManagerFactory getPersistenceManagerFactory( String name, ClassLoader resourceLoader, ClassLoader pmfLoader ) Returns a named PersistenceManagerFactory or persistence unit. Parameters: name - resourceLoader - pmfLoader - Since: JDO 2.0 See Also: getPersistenceManagerFactory(Map,String,ClassLoader,ClassLoader) |
6 | getPersistenceManagerFactory(overrides, name, resourceLoader, pmfLoader)Static Method javax.jdo.JDOHelper PersistenceManagerFactory getPersistenceManagerFactory( Map overrides, String name, ClassLoader resourceLoader, ClassLoader pmfLoader ) Returns a PersistenceManagerFactory configured based on the properties stored in the resource at name, or, if not found, returns |
6 | getPersistenceManagerFactory(overrides, name, resourceLoader)Static Method javax.jdo.JDOHelper PersistenceManagerFactory getPersistenceManagerFactory( Map overrides, String name, ClassLoader resourceLoader ) Returns a named PersistenceManagerFactory or persistence unit. Parameters: overrides - name - resourceLoader - Since: JDO 2.1 See Also: getPersistenceManagerFactory(Map,String,ClassLoader,ClassLoader) |
6 | getPersistenceManagerFactory(props)Static Method javax.jdo.JDOHelper PersistenceManagerFactory getPersistenceManagerFactory( Map props ) Get a PersistenceManagerFactory based on a Properties instance, using the current thread's context class loader to locate the PersistenceManagerFactory class. Parameters: props - a Properties |
6 | getPersistenceManagerFactory(pmfClassLoader)Static Method javax.jdo.JDOHelper PersistenceManagerFactory getPersistenceManagerFactory( ClassLoader pmfClassLoader ) Get the anonymous PersistenceManagerFactory configured via the standard configuration file resource "META-INF/jdoconfig.xml", using the given class loader. Parameters |
