org.apache.openjpa.kernel

Class SaveFieldManager

java.lang.Object

org.apache.openjpa.kernel.AbstractFieldManager

org.apache.openjpa.kernel.ClearFieldManager

org.apache.openjpa.kernel.SaveFieldManager

All Implemented Interfaces:

Serializable, FieldConsumer, FieldManager, FieldSupplier

public class SaveFieldManager
extends ClearFieldManager
implements Serializable

FieldManager type used to store information for rollback.

Author:

Abe White

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SaveFieldManager(StateManagerImpl sm, PersistenceCapable pc, BitSet dirty) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
Object	fetchObjectField(int field) Return the value of the given field.
PersistenceCapable	getState() Return the persistence capable copy holding the rollback field values.
BitSet	getUnloaded() Return the currently-loaded fields that will be unloaded after rollback.
boolean	isFieldEqual(int field, Object current) Compare the given field.
boolean	restoreField(int field) Restore the given field.
boolean	saveField(int field) Save the given field.
void	storeObjectField(int field, Object curVal) Set the value of the given field.

Methods inherited from class org.apache.openjpa.kernel.ClearFieldManager

fetchBooleanField, fetchByteField, fetchCharField, fetchDoubleField, fetchFloatField, fetchIntField, fetchLongField, fetchShortField, fetchStringField, getInstance

Methods inherited from class org.apache.openjpa.kernel.AbstractFieldManager

storeBooleanField, storeByteField, storeCharField, storeDoubleField, storeFloatField, storeIntField, storeLongField, storeShortField, storeStringField

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SaveFieldManager

SaveFieldManager(StateManagerImpl sm,
                PersistenceCapable pc,
                BitSet dirty)

Constructor. Provide StateManagerImpl of instance to save.

Method Detail

getState

public PersistenceCapable getState()

Return the persistence capable copy holding the rollback field values.

getUnloaded

public BitSet getUnloaded()

Return the currently-loaded fields that will be unloaded after rollback.

saveField

public boolean saveField(int field)

Save the given field. If this method returns true, then you need to use this field manager to replace the given field in the instance returned by getState().

restoreField

public boolean restoreField(int field)

Restore the given field. If this method returns true, then you need to use this field manager to replace the given field in the state manager's instance.

isFieldEqual

public boolean isFieldEqual(int field,
                   Object current)

Compare the given field.

Returns:

true if the field is the same in the current state and in the saved state; otherwise, false.

fetchObjectField

public Object fetchObjectField(int field)

Description copied from interface: FieldSupplier

Return the value of the given field.

Specified by:

fetchObjectField in interface FieldSupplier

Overrides:

fetchObjectField in class ClearFieldManager

storeObjectField

public void storeObjectField(int field,
                    Object curVal)

Description copied from interface: FieldConsumer

Set the value of the given field.

Specified by:

storeObjectField in interface FieldConsumer

Overrides:

storeObjectField in class AbstractFieldManager