Package org.eclipse.emf.common.command

Class IdentityCommand

java.lang.Object

org.eclipse.emf.common.command.AbstractCommand

org.eclipse.emf.common.command.IdentityCommand

All Implemented Interfaces:

Command

public class IdentityCommand
extends AbstractCommand

A command that always produces the same result.

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 IdentityCommand	INSTANCE	An empty instance of this object.
protected Collection<?>	result	Keeps track of the result returned from getResult().

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

description, isExecutable, isPrepared, label

Constructor Summary

Constructors

Constructor	Description
IdentityCommand()	Creates an empty instance.
IdentityCommand(Object result)	Creates an instance with a result collection containing the given result object.
IdentityCommand(String label)	Creates an instance with the given label.
IdentityCommand(String label, Object result)	Creates an instance with the given label and a result collection containing the given result object.
IdentityCommand(String label, String description)	Creates an instance with the given label and description.
IdentityCommand(String label, String description, Object result)	Creates an instance with the given label, description, and a result collection containing the given result object.
IdentityCommand(String label, String description, Collection<?> result)	Creates an instance with the given label, description, result collection.
IdentityCommand(String label, Collection<?> result)	Creates an instance with the given label the result collection.
IdentityCommand(Collection<?> result)	Creates an instance with the given result collection.

Method Summary

Modifier and Type	Method	Description
boolean	canExecute()	Returns true.
void	execute()	Do nothing.
String	getDescription()	Returns a string suitable to help describe the effect of this command.
String	getLabel()	Returns a string suitable to represent the label that identifies this command.
Collection<?>	getResult()	Return the identity result.
void	redo()	Do nothing.
void	undo()	Do nothing.

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

canUndo, chain, dispose, getAffectedObjects, prepare, setDescription, setLabel, toString

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final IdentityCommand INSTANCE

An empty instance of this object.

result

protected Collection<?> result

Keeps track of the result returned from getResult().

Constructor Details

IdentityCommand

public IdentityCommand()

Creates an empty instance.

IdentityCommand

public IdentityCommand(Object result)

Creates an instance with a result collection containing the given result object.

Parameters:

result - the one object in the result collection.

IdentityCommand

public IdentityCommand(Collection<?> result)

Creates an instance with the given result collection.

Parameters:

result - the result collection.

IdentityCommand

public IdentityCommand(String label)

Creates an instance with the given label.

Parameters:

label - the label.

IdentityCommand

public IdentityCommand(String label,
 Object result)

Creates an instance with the given label and a result collection containing the given result object.

Parameters:

label - the label.

result - the one object in the result collection.

IdentityCommand

public IdentityCommand(String label,
 Collection<?> result)

Creates an instance with the given label the result collection.

Parameters:

label - the label.

result - the result collection.

IdentityCommand

public IdentityCommand(String label,
 String description)

Creates an instance with the given label and description.

Parameters:

label - the label.

description - the description.

IdentityCommand

public IdentityCommand(String label,
 String description,
 Object result)

Creates an instance with the given label, description, and a result collection containing the given result object.

Parameters:

label - the label.

description - the description.

result - the one object in the result collection.

IdentityCommand

public IdentityCommand(String label,
 String description,
 Collection<?> result)

Creates an instance with the given label, description, result collection.

Parameters:

label - the label.

description - the description.

result - the result collection.

Method Details

canExecute

public boolean canExecute()

Returns true.

Specified by:

canExecute in interface Command

Overrides:

canExecute in class AbstractCommand

Returns:

true.

execute

public void execute()

Do nothing.

undo

public void undo()

Do nothing.

Specified by:

undo in interface Command

Overrides:

undo in class AbstractCommand

redo

public void redo()

Do nothing.

getLabel

public String getLabel()

Description copied from interface: Command

Returns a string suitable to represent the label that identifies this command.

Specified by:

getLabel in interface Command

Overrides:

getLabel in class AbstractCommand

Returns:

a string suitable to represent the label that identifies this command.

getDescription

public String getDescription()

Description copied from interface: Command

Returns a string suitable to help describe the effect of this command.

Specified by:

getDescription in interface Command

Overrides:

getDescription in class AbstractCommand

Returns:

a string suitable to help describe the effect of this command.

getResult

public Collection<?> getResult()

Return the identity result.

Specified by:

getResult in interface Command

Overrides:

getResult in class AbstractCommand

Returns:

the identity result.