org.eclipse.emf.transaction.util
Class CommandChangeDescription

java.lang.Object
  org.eclipse.emf.common.notify.impl.BasicNotifierImpl
      org.eclipse.emf.ecore.impl.BasicEObjectImpl
          org.eclipse.emf.ecore.impl.EObjectImpl
              org.eclipse.emf.ecore.change.impl.ChangeDescriptionImpl
                  org.eclipse.emf.transaction.util.CommandChangeDescription

All Implemented Interfaces:

Notifier, ChangeDescription, EObject, InternalEObject, TransactionChangeDescription

public class CommandChangeDescription
extends ChangeDescriptionImpl
implements TransactionChangeDescription

A change description that simply wraps a Command, asking it to undo or redo when applying.

Note that this class is not intended to be used by clients. It is only needed by service providers extending this API.

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.emf.ecore.change.impl.ChangeDescriptionImpl

ChangeDescriptionImpl.OldContainmentInformation

Nested classes/interfaces inherited from class org.eclipse.emf.ecore.impl.BasicEObjectImpl

BasicEObjectImpl.EPropertiesHolder, BasicEObjectImpl.EPropertiesHolderBaseImpl, BasicEObjectImpl.EPropertiesHolderImpl

Nested classes/interfaces inherited from class org.eclipse.emf.common.notify.impl.BasicNotifierImpl

BasicNotifierImpl.EAdapterList<E extends Object & Adapter>

Nested classes/interfaces inherited from interface org.eclipse.emf.ecore.InternalEObject

InternalEObject.EStore

Field Summary

Fields inherited from class org.eclipse.emf.ecore.change.impl.ChangeDescriptionImpl

objectChanges, objectsToAttach, objectsToDetach, oldContainmentInformation, resourceChanges

Fields inherited from class org.eclipse.emf.ecore.impl.EObjectImpl

eAdapters, eContainer, eContainerFeatureID, EDELIVER, EDYNAMIC_CLASS, eFlags, ELAST_EOBJECT_FLAG, ELAST_NOTIFIER_FLAG, eProperties, EPROXY

Fields inherited from class org.eclipse.emf.ecore.impl.BasicEObjectImpl

EVIRTUAL_GET, EVIRTUAL_IS_SET, EVIRTUAL_NO_VALUE, EVIRTUAL_SET, EVIRTUAL_UNSET

Fields inherited from interface org.eclipse.emf.ecore.InternalEObject

EOPPOSITE_FEATURE_BASE

Constructor Summary

CommandChangeDescription(Command command)
Initializes me with the command that I encapsulate.

Method Summary

void	apply() I apply my change by undoing the encapsulated operation.
void	applyAndReverse() I apply-and-reverse by alternately undoing and redoing the encapsulated operation.
boolean	canApply() I can apply if my wrapped command can undo or redo, according to whether it was last undone or redone.
Command	chain(Command newCommand) Chains a new command onto the command that I encapsulate, returning the chained result.
void	dispose() Forgets my operation and clears my reference to the adaptable.
boolean	isEmpty() I can only assume that the operation I wrap makes some kind of change.

Methods inherited from class org.eclipse.emf.ecore.change.impl.ChangeDescriptionImpl

eGet, eInverseRemove, eIsSet, eSet, eStaticClass, eUnset, getContainedEObjects, getObjectChanges, getObjectsToAttach, getObjectsToDetach, getObjectsToDetachGen, getOldContainer, getOldContainmentFeature, getOldContainmentInformation, getResourceChanges, preApply

Methods inherited from class org.eclipse.emf.ecore.impl.EObjectImpl

eAdapters, eBasicAdapters, eBasicProperties, eBasicSetContainer, eClass, eContainerFeatureID, eDeliver, eInternalContainer, eIsProxy, eProperties, eSetClass, eSetDeliver, eSetProxyURI

Methods inherited from class org.eclipse.emf.ecore.impl.BasicEObjectImpl

eAddVirtualValue, eAllContents, eBaseStructuralFeatureID, eBasicRemoveFromContainer, eBasicRemoveFromContainerFeature, eBasicSetContainer, eComputeVirtualValuesCapacity, eContainer, eContainingFeature, eContainmentFeature, eContainmentFeature, eContains, eContents, eCrossReferences, eDerivedStructuralFeatureID, eDerivedStructuralFeatureID, eDirectResource, eDynamicBasicRemoveFromContainer, eDynamicClass, eDynamicFeature, eDynamicFeatureID, eDynamicGet, eDynamicGet, eDynamicGet, eDynamicInverseAdd, eDynamicInverseAdd, eDynamicInverseRemove, eDynamicInverseRemove, eDynamicIsSet, eDynamicIsSet, eDynamicIsSet, eDynamicSet, eDynamicSet, eDynamicSet, eDynamicUnset, eDynamicUnset, eDynamicUnset, eGet, eGet, eGet, eHasSettings, eInternalResource, eInverseAdd, eInverseAdd, eInverseRemove, eIsSet, eObjectForURIFragmentSegment, eOpenGet, eOpenIsSet, eOpenSet, eOpenUnset, eProxyURI, eRemoveVirtualValue, eResolveProxy, eResource, eSet, eSetDirectResource, eSetResource, eSetStore, eSetting, eSettingDelegate, eSettings, eSetVirtualIndexBits, eSetVirtualValue, eSetVirtualValues, eStaticFeatureCount, eStore, eUnset, eURIFragmentSegment, eVirtualBitCount, eVirtualGet, eVirtualGet, eVirtualIndex, eVirtualIndexBits, eVirtualIsSet, eVirtualSet, eVirtualUnset, eVirtualValue, eVirtualValues, toString

Methods inherited from class org.eclipse.emf.common.notify.impl.BasicNotifierImpl

eNotificationRequired, eNotify

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.emf.ecore.change.ChangeDescription

getObjectChanges, getObjectsToAttach, getObjectsToDetach, getResourceChanges

Methods inherited from interface org.eclipse.emf.ecore.EObject

eAllContents, eClass, eContainer, eContainingFeature, eContainmentFeature, eContents, eCrossReferences, eGet, eGet, eIsProxy, eIsSet, eResource, eSet, eUnset

Methods inherited from interface org.eclipse.emf.common.notify.Notifier

eAdapters, eDeliver, eNotify, eSetDeliver

Methods inherited from interface org.eclipse.emf.ecore.InternalEObject

eNotificationRequired

Constructor Detail

CommandChangeDescription

public CommandChangeDescription(Command command)

Initializes me with the command that I encapsulate.

Parameters:

command - the command that I encapsulate

Method Detail

chain

public Command chain(Command newCommand)

Chains a new command onto the command that I encapsulate, returning the chained result.

Parameters:

newCommand - a command to chain onto my command

Returns:

the new command chain

canApply

public boolean canApply()

I can apply if my wrapped command can undo or redo, according to whether it was last undone or redone.

Specified by:

canApply in interface TransactionChangeDescription

Returns:

true if my command can undo/redo; false, otherwise

See Also:

Command.canUndo(), ConditionalRedoCommand.canRedo()

apply

public void apply()

I apply my change by undoing the encapsulated operation. After it is undone, I dispose myself.

Specified by:

apply in interface ChangeDescription

Overrides:

apply in class ChangeDescriptionImpl

applyAndReverse

public void applyAndReverse()

I apply-and-reverse by alternately undoing and redoing the encapsulated operation.

Specified by:

applyAndReverse in interface ChangeDescription

Overrides:

applyAndReverse in class ChangeDescriptionImpl

isEmpty

public boolean isEmpty()

I can only assume that the operation I wrap makes some kind of change.

Specified by:

isEmpty in interface TransactionChangeDescription

Returns:

false, always

dispose

public void dispose()

Forgets my operation and clears my reference to the adaptable.