org.eclipse.gef4.mvc.operations

Interface ITransactionalOperation

All Superinterfaces:

IUndoableOperation

All Known Implementing Classes:

AbstractCompositeOperation, AddContentChildOperation, AttachToContentAnchorageOperation, ChangeContentsOperation, ChangeFocusOperation, DeselectOperation, DetachFromContentAnchorageOperation, ForwardUndoCompositeOperation, FXBendOperation, FXChangeViewportOperation, FXResizeNodeOperation, FXRevealOperation, FXTransformOperation, RemoveContentChildOperation, ReverseUndoCompositeOperation, SelectOperation, SetPropertyValueOperation, SetRefreshVisualOperation

public interface ITransactionalOperation
extends IUndoableOperation

An ITransactionalOperation is an IUndoableOperation that tolerates successive calls to IUndoableOperation.execute(IProgressMonitor, IAdaptable) and IUndoableOperation.undo(IProgressMonitor, IAdaptable) and allows to check whether it has an overall effect (isNoOp()) compared to the initial state upon construction.

It is used by transaction policies to encapsulate their applied changes. The transaction policy will potentially execute the operation locally (to realize "live-feedback") before returning it in its AbstractTransactionPolicy.commit() method. It will then be executed on the IOperationHistory, but only if it has an overall effect that needs to be undoable.

Method Summary

Modifier and Type	Method and Description
boolean	isNoOp() Returns true if this ITransactionalOperation has no effect (in comparison to its initial state).

Methods inherited from interface org.eclipse.core.commands.operations.IUndoableOperation

addContext, canExecute, canRedo, canUndo, dispose, execute, getContexts, getLabel, hasContext, redo, removeContext, undo

Method Detail

isNoOp

boolean isNoOp()

Returns true if this ITransactionalOperation has no effect (in comparison to its initial state). Otherwise returns false.

Returns:

true if this ITransactionalOperation has no effect, otherwise false.