com.sas.util
Class AbstractCommand

java.lang.Object
  |
  +--com.sas.util.AbstractCommand

All Implemented Interfaces:

Command, PublicClonable, SimpleCommand, StringDataInterface

Direct Known Subclasses:

ComposeMessageCommand

public abstract class AbstractCommand

extends java.lang.Object

implements Command, java.io.Serializable

AbstractCommand is an abstract Command that is executable and only requires the execute() method to be overridden.

See Also:

Serialized Form

Constructor Summary

AbstractCommand()
Default Constructor.

Method Summary

abstract Object	clone() Commands are clonable.
abstract void	execute(Object arg) This does nothing.
String	getText() Return the text.
boolean	isExecutable() Return true, this Command is executable.
boolean	isUndoable() Return false, this Command is not Undoable.
void	setText(String txt) Set the text of the AbstractCommand.
void	undo() This does nothing.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractCommand

public AbstractCommand()

Default Constructor.

Method Detail

clone

public abstract Object clone()
                      throws CloneNotSupportedException

Description copied from interface: Command

Commands are clonable. The framework which uses commands may clone a Command object after invoking it, if it wishes to store the command on an undo history or otherwise maintain a reference to the Command object. The clone should preserve the undo information so that the cloned command stored on an undo history may be undone.

Specified by:

clone in interface Command

Overrides:

clone in class Object

Following copied from interface: com.sas.util.Command

Returns:

the cloned object.

Throws:

CloneNotSupportedException - if the command cannot be cloned.

isExecutable

public boolean isExecutable()

Return true, this Command is executable.

Specified by:

isExecutable in interface Command

Returns:

true, this Command is executable

isUndoable

public boolean isUndoable()

Return false, this Command is not Undoable.

Specified by:

isUndoable in interface Command

Returns:

false, this Command is not Undoable

undo

public void undo()

This does nothing.

Specified by:

undo in interface Command

Following copied from interface: com.sas.util.Command

See Also:

SimpleCommand.execute(Object)

execute

public abstract void execute(Object arg)

This does nothing.

Specified by:

execute in interface SimpleCommand

Following copied from interface: com.sas.util.SimpleCommand

Parameters:

arg - an argument which the caller wishes to pass to the command. The arg may be null if no information is needed.

getText

public String getText()

Return the text.

Specified by:

getText in interface StringDataInterface

Returns:

text

setText

public void setText(String txt)

Set the text of the AbstractCommand.

Specified by:

setText in interface StringDataInterface

Parameters:

txt - the text