Package org.eclipse.emf.common.command

Class UnexecutableCommand

java.lang.Object

org.eclipse.emf.common.command.AbstractCommand

org.eclipse.emf.common.command.UnexecutableCommand

All Implemented Interfaces:

Command

public class UnexecutableCommand
extends AbstractCommand

A singleton INSTANCE that cannot execute.

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.emf.common.command.AbstractCommand

AbstractCommand.NonDirtying

Field Summary

Fields

Modifier and Type	Field	Description
static final UnexecutableCommand	INSTANCE	The one instance of this object.

Fields inherited from class org.eclipse.emf.common.command.AbstractCommand

description, isExecutable, isPrepared, label

Method Summary

Modifier and Type	Method	Description
boolean	canExecute()	Returns false.
boolean	canUndo()	Returns false.
void	execute()	Throws an exception if it should ever be called.
void	redo()	Throws an exception if it should ever be called.

Methods inherited from class org.eclipse.emf.common.command.AbstractCommand

chain, dispose, getAffectedObjects, getDescription, getLabel, getResult, prepare, setDescription, setLabel, toString, undo

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final UnexecutableCommand INSTANCE

The one instance of this object.

Method Details

canExecute

public boolean canExecute()

Returns false.

Specified by:

canExecute in interface Command

Overrides:

canExecute in class AbstractCommand

Returns:

false.

execute

public void execute()

Throws an exception if it should ever be called.

Throws:

UnsupportedOperationException - always.

canUndo

public boolean canUndo()

Returns false.

Specified by:

canUndo in interface Command

Overrides:

canUndo in class AbstractCommand

Returns:

false.

redo

public void redo()

Throws an exception if it should ever be called.

Throws:

UnsupportedOperationException - always.