Package org.datanucleus.flush

Class CollectionRemoveOperation<E>

java.lang.Object

org.datanucleus.flush.CollectionRemoveOperation<E>

All Implemented Interfaces:

Operation, SCOOperation

Direct Known Subclasses:

ListRemoveAtOperation

public class CollectionRemoveOperation<E>
extends java.lang.Object
implements SCOOperation

Remove operation for a collection. This is usually for the situation where we have a backing store, but also can be used where we are removing an object from a collection and the field is marked as cascade delete but we don't want to delete immediately.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) boolean	allowCascadeDelete	Whether to allow cascade-delete checks.
(package private) int	fieldNumber
(package private) DNStateManager	sm
(package private) CollectionStore<E>	store
(package private) E	value	The value to remove.

Constructor Summary

Constructors

Constructor	Description
CollectionRemoveOperation(DNStateManager sm, int fieldNum, E value, boolean allowCascadeDelete)
CollectionRemoveOperation(DNStateManager sm, CollectionStore<E> store, E value, boolean allowCascadeDelete)

Method Summary

Modifier and Type	Method	Description
AbstractMemberMetaData	getMemberMetaData()	Accessor for the metadata for the member that this operation is for.
DNStateManager	getStateManager()	Accessor for StateManager of the object that this operation is performed on.
Store	getStore()	Accessor for the backing store for this operation.
E	getValue()	Accessor for the value being removed.
void	perform()	Perform the remove(Object) operation on the specified container.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

sm

final DNStateManager sm

fieldNumber

final int fieldNumber

store

final CollectionStore<E> store

value

final E value

The value to remove.

allowCascadeDelete

final boolean allowCascadeDelete

Whether to allow cascade-delete checks.

Constructor Detail

CollectionRemoveOperation

public CollectionRemoveOperation(DNStateManager sm,
                                 CollectionStore<E> store,
                                 E value,
                                 boolean allowCascadeDelete)

CollectionRemoveOperation

public CollectionRemoveOperation(DNStateManager sm,
                                 int fieldNum,
                                 E value,
                                 boolean allowCascadeDelete)

Method Detail

getMemberMetaData

public AbstractMemberMetaData getMemberMetaData()

Description copied from interface: SCOOperation

Accessor for the metadata for the member that this operation is for.

Specified by:

getMemberMetaData in interface SCOOperation

Returns:

The member metadata

getValue

public E getValue()

Accessor for the value being removed.

Returns:

Value being removed

perform

public void perform()

Perform the remove(Object) operation on the specified container.

Specified by:

perform in interface Operation

getStore

public Store getStore()

Description copied from interface: SCOOperation

Accessor for the backing store for this operation.

Specified by:

getStore in interface SCOOperation

Returns:

The backing store

getStateManager

public DNStateManager getStateManager()

Description copied from interface: Operation

Accessor for StateManager of the object that this operation is performed on.

Specified by:

getStateManager in interface Operation

Returns:

StateManager

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object