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 |
5 | 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) |
5 | getPersistenceManagerFactory(name, loader)Static Method javax.jdo.JDOHelper PersistenceManagerFactory getPersistenceManagerFactory( String name, ClassLoader loader ) Returns a named PersistenceManagerFactory or persistence unit. Parameters: name - loader - Since: JDO 1.0 See Also: getPersistenceManagerFactory(Map,String,ClassLoader,ClassLoader) |
5 | getPersistenceManagerFactory(name)Static Method javax.jdo.JDOHelper PersistenceManagerFactory getPersistenceManagerFactory( String name ) Returns a named PersistenceManagerFactory or persistence unit. Parameters: name - Since: JDO 2.1 See Also: getPersistenceManagerFactory(Map,String,ClassLoader,ClassLoader) |
5 | makeDirty(pc, fieldName)Static Method javax.jdo.JDOHelper void makeDirty( Object pc, String fieldName ) Explicitly mark the parameter instance and field dirty. Normally, PersistenceCapable classes are able to detect changes made to their fields. However, if a reference to an array is given to a method outside the class |
5 | getPersistenceManagerFactory(props, pmfClassLoader)Static Method javax.jdo.JDOHelper PersistenceManagerFactory getPersistenceManagerFactory( Map props, ClassLoader pmfClassLoader ) Get a PersistenceManagerFactory based on a Map and a class loader. This method delegates to the getPersistenceManagerFactory method that takes a Map of overrides |
5 | isTransactional(pc)Static Method javax.jdo.JDOHelper boolean isTransactional( Object pc ) Tests whether the parameter instance is transactional. Instances whose state is associated with the current transaction return true. Transient instances and instances of classes that do not implement PersistenceCapable return |
