myhw3.data

Class CmdAdd

java.lang.Object

myhw3.data.CmdAdd

All Implemented Interfaces:

Command

final class CmdAdd
extends java.lang.Object
implements Command

Implementation of command to add or remove inventory.

See Also:

Data

Field Summary

Fields

Modifier and Type	Field and Description
private int	change
private InventorySet	inventory
private Record	oldvalue
private boolean	runOnce
private Video	video

Constructor Summary

Constructors

Constructor and Description
CmdAdd(InventorySet inventory, Video video, int change)

Method Summary

Modifier and Type	Method and Description
void	redo() Redo the command.
boolean	run() Do the command.
void	undo() Undo the command.

Methods inherited from class java.lang.Object

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

Field Detail

runOnce

private boolean runOnce

inventory

private InventorySet inventory

oldvalue

private Record oldvalue

video

private Video video

change

private int change

Constructor Detail

CmdAdd

CmdAdd(InventorySet inventory,
       Video video,
       int change)

Method Detail

run

public boolean run()

Description copied from interface: Command

Do the command.

Specified by:

run in interface Command

Returns:

true if command succeeds, false otherwise

undo

public void undo()

Description copied from interface: Command

Undo the command.

Specified by:

undo in interface Command

redo

public void redo()

Description copied from interface: Command

Redo the command.

Specified by:

redo in interface Command