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.

Field Summary

static IdentityCommand	INSTANCE An empty instance of this object.
protected java.util.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

IdentityCommand()
Creates an empty instance.

IdentityCommand(java.util.Collection result)
Creates an instance with the given result collection.

IdentityCommand(java.lang.Object result)
Creates an instance with a result collection containing the given result object.

IdentityCommand(java.lang.String label)
Creates an instance with the given label.

IdentityCommand(java.lang.String label, java.util.Collection result)
Creates an instance with the given label the result collection.

IdentityCommand(java.lang.String label, java.lang.Object result)
Creates an instance with the given label and a result collection containing the given result object.

IdentityCommand(java.lang.String label, java.lang.String description)
Creates an instance with the given label and description.

IdentityCommand(java.lang.String label, java.lang.String description, java.util.Collection result)
Creates an instance with the given label, description, result collection.

IdentityCommand(java.lang.String label, java.lang.String description, java.lang.Object result)
Creates an instance with the given label, description, and a result collection containing the given result object.

Method Summary

boolean	canExecute() Returns true.
void	execute() Do nothing.
java.lang.String	getDescription() Returns a string suitable to help describe the effect of this command.
java.lang.String	getLabel() Returns a string suitable to represent the label that identifies this command.
java.util.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 Detail

INSTANCE

public static final IdentityCommand INSTANCE

An empty instance of this object.

result

protected java.util.Collection result

Keeps track of the result returned from getResult().

Constructor Detail

IdentityCommand

public IdentityCommand()

Creates an empty instance.

IdentityCommand

public IdentityCommand(java.lang.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(java.util.Collection result)

Creates an instance with the given result collection.

Parameters:

result - the result collection.

IdentityCommand

public IdentityCommand(java.lang.String label)

Creates an instance with the given label.

Parameters:

label - the label.

IdentityCommand

public IdentityCommand(java.lang.String label,
                       java.lang.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(java.lang.String label,
                       java.util.Collection result)

Creates an instance with the given label the result collection.

Parameters:

label - the label.

result - the result collection.

IdentityCommand

public IdentityCommand(java.lang.String label,
                       java.lang.String description)

Creates an instance with the given label and description.

Parameters:

label - the label.

description - the description.

IdentityCommand

public IdentityCommand(java.lang.String label,
                       java.lang.String description,
                       java.lang.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(java.lang.String label,
                       java.lang.String description,
                       java.util.Collection result)

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

Parameters:

label - the label.

description - the description.

result - the result collection.

Method Detail

canExecute

public boolean canExecute()

Returns true.

Overrides:

canExecute in class AbstractCommand

Returns:

true.

execute

public void execute()

Do nothing.

undo

public void undo()

Do nothing.

Overrides:

undo in class AbstractCommand

Following copied from class: org.eclipse.emf.common.command.AbstractCommand

Throws:

UnsupportedOperationException - always.

redo

public void redo()

Do nothing.

getLabel

public java.lang.String getLabel()

Description copied from interface: Command

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

Overrides:

getLabel in class AbstractCommand

Following copied from interface: org.eclipse.emf.common.command.Command

Returns:

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

getDescription

public java.lang.String getDescription()

Description copied from interface: Command

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

Overrides:

getDescription in class AbstractCommand

Following copied from interface: org.eclipse.emf.common.command.Command

Returns:

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

getResult

public java.util.Collection getResult()

Return the identity result.

Overrides:

getResult in class AbstractCommand

Returns:

the identity result.