org.argouml.kernel
Class AbstractCommand

java.lang.Object
  org.argouml.kernel.AbstractCommand

All Implemented Interfaces:

Command

public abstract class AbstractCommand
extends java.lang.Object
implements Command

The base class for any commands that can be undone by ActionUndo.

AbstractCommand

public AbstractCommand()

execute

public abstract java.lang.Object execute()

Description copied from interface: Command

Execute the command to redo an instruction.

Specified by:

execute in interface Command

Returns:

any result object created by the command

undo

public abstract void undo()

Description copied from interface: Command

Perform undo an an undoable command that is in an undoable state

Specified by:

undo in interface Command

isUndoable

public boolean isUndoable()

Description copied from interface: Command

Returns true if the command can be undone.

Specified by:

isUndoable in interface Command

Returns:

true if the command is undoable

isRedoable

public boolean isRedoable()

Description copied from interface: Command

Returns true if the command can be redone once undone

Specified by:

isRedoable in interface Command

Returns:

true if the command is redoable