org.datanucleus.store.fieldmanager

Class DetachFieldManager

java.lang.Object

org.datanucleus.store.fieldmanager.AbstractFieldManager

org.datanucleus.store.fieldmanager.AbstractFetchDepthFieldManager

org.datanucleus.store.fieldmanager.DetachFieldManager

All Implemented Interfaces:

FieldConsumer, FieldManager, FieldSupplier

public class DetachFieldManager
extends AbstractFetchDepthFieldManager

FieldManager to handle the detachment of fields with persistable objects.

Nested Class Summary

Nested classes/interfaces inherited from class org.datanucleus.store.fieldmanager.AbstractFetchDepthFieldManager

AbstractFetchDepthFieldManager.EndOfFetchPlanGraphException

Field Summary

Fields inherited from class org.datanucleus.store.fieldmanager.AbstractFetchDepthFieldManager

fpClass, op, secondClassMutableFields, state

Constructor Summary

Constructors

Constructor and Description
DetachFieldManager(ObjectProvider op, boolean[] secondClassMutableFields, FetchPlanForClass fpClass, FetchPlanState state, boolean copy) Constructor for a field manager for detachment.

Method Summary

Methods

Modifier and Type	Method and Description
protected Object	endOfGraphOperation(int fieldNumber) Method to throw and EndOfFetchPlanGraphException since we're at the end of a branch in the tree.
protected Object	internalFetchObjectField(int fieldNumber) Method to fetch an object field whether it is collection/map, PC, or whatever for the detachment process.
protected Object	processPersistable(Object pc) Utility method to process the passed persistable object.

Methods inherited from class org.datanucleus.store.fieldmanager.AbstractFetchDepthFieldManager

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

Methods inherited from class org.datanucleus.store.fieldmanager.AbstractFieldManager

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

Constructor Detail

DetachFieldManager

public DetachFieldManager(ObjectProvider op,
                  boolean[] secondClassMutableFields,
                  FetchPlanForClass fpClass,
                  FetchPlanState state,
                  boolean copy)

Constructor for a field manager for detachment.

Parameters:

op - the ObjectProvider of the instance being detached. An instance in Persistent or Transactional state

secondClassMutableFields - The second class mutable fields for the class of this object

fpClass - Fetch Plan for the class of this instance

state - State object to hold any pertinent controls for the detachment process

copy - Whether to create detached COPIES or just detach in-situ

Method Detail

processPersistable

protected Object processPersistable(Object pc)

Utility method to process the passed persistable object.

Parameters:

pc - The PC object

internalFetchObjectField

protected Object internalFetchObjectField(int fieldNumber)

Method to fetch an object field whether it is collection/map, PC, or whatever for the detachment process.

Specified by:

internalFetchObjectField in class AbstractFetchDepthFieldManager

Parameters:

fieldNumber - Number of the field

Returns:

The object

endOfGraphOperation

protected Object endOfGraphOperation(int fieldNumber)

Method to throw and EndOfFetchPlanGraphException since we're at the end of a branch in the tree.

Specified by:

endOfGraphOperation in class AbstractFetchDepthFieldManager

Parameters:

fieldNumber - Number of the field

Returns:

Object to return