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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:
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Notifier,
ChangeDescription,
EObject,
InternalEObject,
TransactionChangeDescription
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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.
Method Summary
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void
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apply
()
I apply my change by undoing the encapsulated operation. |
void
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applyAndReverse
()
I apply-and-reverse by alternately undoing and redoing the encapsulated
operation. |
boolean
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canApply
()
I can apply if my wrapped command can undo or redo, according to whether
it was last undone or redone. |
Command
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chain
(
Command newCommand)
Chains a new command onto the command that I encapsulate, returning the
chained result. |
void
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dispose
()
Forgets my operation and clears my reference to the adaptable. |
boolean
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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
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eGet,
eInverseRemove,
eIsSet,
eSet,
eStaticClass,
eUnset,
getContainedEObjects,
getObjectChanges,
getObjectsToAttach,
getObjectsToDetach,
getObjectsToDetachGen,
getOldContainer,
getOldContainmentFeature,
getOldContainmentInformation,
getResourceChanges,
preApply
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Methods inherited from class org.eclipse.emf.ecore.impl.
EObjectImpl
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eAdapters,
eBasicAdapters,
eBasicProperties,
eBasicSetContainer,
eClass,
eContainerFeatureID,
eDeliver,
eInternalContainer,
eIsProxy,
eProperties,
eSetClass,
eSetDeliver,
eSetProxyURI
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Methods inherited from class org.eclipse.emf.ecore.impl.
BasicEObjectImpl
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eAddVirtualValue,
eAllContents,
eBaseStructuralFeatureID,
eBasicRemoveFromContainer,
eBasicRemoveFromContainerFeature,
eBasicSetContainer,
eComputeVirtualValuesCapacity,
eContainer,
eContainerAdapterArray,
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
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Methods inherited from interface org.eclipse.emf.ecore.
EObject
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eAllContents,
eClass,
eContainer,
eContainingFeature,
eContainmentFeature,
eContents,
eCrossReferences,
eGet,
eGet,
eIsProxy,
eIsSet,
eResource,
eSet,
eUnset
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CommandChangeDescription
public CommandChangeDescription(
Command command)
- Initializes me with the command that I encapsulate.
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Parameters:
-
command - the command that I encapsulate
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
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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:
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canApply
in interface
TransactionChangeDescription
-
-
Returns:
-
true if my command can undo/redo;
false , otherwise -
See Also:
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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:
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apply
in interface
ChangeDescription
-
Overrides:
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apply
in class
ChangeDescriptionImpl
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applyAndReverse
public void applyAndReverse()
- I apply-and-reverse by alternately undoing and redoing the encapsulated
operation.
-
-
Specified by:
-
applyAndReverse
in interface
ChangeDescription
-
Overrides:
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applyAndReverse
in class
ChangeDescriptionImpl
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isEmpty
public boolean isEmpty()
- I can only assume that the operation I wrap makes some kind of change.
-
-
Specified by:
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isEmpty
in interface
TransactionChangeDescription
-
-
Returns:
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false , always
dispose
public void dispose()
- Forgets my operation and clears my reference to the adaptable.
-
-
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