org.vizzini.game.boardgame.chess.action
Class ChessActionComparator

java.lang.Object
  org.vizzini.game.boardgame.chess.action.ChessActionComparator

All Implemented Interfaces:

Comparator

public class ChessActionComparator
extends Object
implements Comparator

Provides a Comparator to order chess actions. The action order is hopefully useful to the alpha-beta forward search algorithm, with capture moves first.

Since:

v0.3

Version:

v0.3

Author:

Jeffrey M. Thompson

Constructor Summary

ChessActionComparator(IChessEnvironment board)
Construct this object with the given parameter.

Method Summary

int	compare(Object object0, Object object1) Return -1, 0, 1 if object0 is less than, equal to, or greater than object1.
protected int	compareActionClass(Class class0, Class class1) Sort the action class in this order: PawnPromotionCaptureAction MoveCaptureAction EnPassantCaptureAction PawnPromotionAction MoveAction CastleAction
protected int	compareTokenClass(Class class0, Class class1) Sort the token class in this order: IQueen IRook IKnight IBishop IPawn IMace IKing
void	setBoard(IChessEnvironment board)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

ChessActionComparator

public ChessActionComparator(IChessEnvironment board)

Construct this object with the given parameter.

Parameters:

board - Chess environment. (required)

Since:

v0.3

Method Detail

compare

public int compare(Object object0,
                   Object object1)

Return -1, 0, 1 if object0 is less than, equal to, or greater than object1.

Specified by:

compare in interface Comparator

Since:

v0.3

setBoard

public void setBoard(IChessEnvironment board)

Parameters:

board - The board to set.

Since:

v0.3

compareActionClass

protected int compareActionClass(Class class0,
                                 Class class1)

Sort the action class in this order:

1. PawnPromotionCaptureAction
2. MoveCaptureAction
3. EnPassantCaptureAction
4. PawnPromotionAction
5. MoveAction
6. CastleAction

Parameters:

class0 - First class.

class1 - Second class.

Since:

v0.3

compareTokenClass

protected int compareTokenClass(Class class0,
                                Class class1)

Sort the token class in this order:

1. IQueen
2. IRook
3. IKnight
4. IBishop
5. IPawn
6. IMace
7. IKing

Parameters:

class0 - First class.

class1 - Second class.

Since:

v0.3