org.apache.openjpa.kernel
Class VersionAttachStrategy
java.lang.Object
   org.apache.openjpa.kernel.TransferFieldManager
org.apache.openjpa.kernel.TransferFieldManager
       org.apache.openjpa.kernel.AttachStrategy
org.apache.openjpa.kernel.AttachStrategy
           org.apache.openjpa.kernel.VersionAttachStrategy
org.apache.openjpa.kernel.VersionAttachStrategy
- All Implemented Interfaces: 
- FieldConsumer, FieldManager, FieldSupplier, DetachState
-  class VersionAttachStrategy 
- extends AttachStrategy- implements DetachState
Handles attaching instances using version and primary key fields.
- Author:
- Steve Kim
 
 
 
 
| Method Summary | 
|  Object | attach(AttachManager manager,
       Object toAttach,
       ClassMetaData meta,
       PersistenceCapable into,
       OpenJPAStateManager owner,
       ValueMetaData ownerMeta,
       boolean explicit)Attach.
 | 
| protected  PersistenceCapable | findFromDatabase(AttachManager manager,
                 Object pc)Find a PersistenceCapable instance of an Object if it exists in the
 database.
 | 
| protected  Object | getDetachedObjectId(AttachManager manager,
                    Object toAttach)Return the identity of the given detached instance.
 | 
| protected  void | provideField(Object toAttach,
             StateManagerImpl sm,
             int field)Provide the given field into this field manager.
 | 
 
 
| Methods inherited from class org.apache.openjpa.kernel.TransferFieldManager | 
| clear, fetchBooleanField, fetchByteField, fetchCharField, fetchDoubleField, fetchFloatField, fetchIntField, fetchLongField, fetchObjectField, fetchShortField, fetchStringField, storeBooleanField, storeByteField, storeCharField, storeDoubleField, storeFloatField, storeIntField, storeLongField, storeObjectField, storeShortField, storeStringField | 
 
| Methods inherited from class java.lang.Object | 
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait | 
 
VersionAttachStrategy
VersionAttachStrategy()
getDetachedObjectId
protected Object getDetachedObjectId(AttachManager manager,
                                     Object toAttach)
- Description copied from class: AttachStrategy
- Return the identity of the given detached instance.
 
- 
- Specified by:
- getDetachedObjectIdin class- AttachStrategy
 
- 
 
provideField
protected void provideField(Object toAttach,
                            StateManagerImpl sm,
                            int field)
- Description copied from class: AttachStrategy
- Provide the given field into this field manager.
 
- 
- Specified by:
- provideFieldin class- AttachStrategy
 
- 
 
attach
public Object attach(AttachManager manager,
                     Object toAttach,
                     ClassMetaData meta,
                     PersistenceCapable into,
                     OpenJPAStateManager owner,
                     ValueMetaData ownerMeta,
                     boolean explicit)
- Description copied from class: AttachStrategy
- Attach.
 
- 
- Specified by:
- attachin class- AttachStrategy
 
- 
- Parameters:
- manager- manager holding cache of attached instances
- toAttach- detached instance
- meta- metadata for the instance being attached
- into- instance we're attaching into
- owner- state manager for- into
- ownerMeta- field we traversed to find- toAttach
- explicit- whether to make new instances explicitly persistent
 
findFromDatabase
protected PersistenceCapable findFromDatabase(AttachManager manager,
                                              Object pc)
- Find a PersistenceCapable instance of an Object if it exists in the
 database. If the object is null or can't be found in the database.
 
- 
 
- 
- Parameters:
- pc- An object which will be attached into the current context. The
 object may or may not correspond to a row in the database.
- Returns:
- If the object is null or can't be found in the database this
 method returns null. Otherwise a PersistenceCapable representation of the
 object is returned.
 
Copyright © 2006-2011 Apache Software Foundation. All Rights Reserved.