chesspresso.position
Class LightWeightPosition

java.lang.Object
  |
  +--chesspresso.position.AbstractPosition
        |
        +--chesspresso.position.AbstractMutablePosition
              |
              +--chesspresso.position.LightWeightPosition

All Implemented Interfaces:

ImmutablePosition, MutablePosition

public class LightWeightPosition

extends AbstractMutablePosition

A light-weight implementation of the position interface. This class is optimized for simplicity of the underlying data structure, not for speed of accessors nor for memory footprint. Use this class if you do not care about performance.

Version:

$Revision: 1.1 $

Author:

BerniMan

Field Summary

Fields inherited from class chesspresso.position.AbstractMutablePosition

m_changeListeners, m_listeners, m_notifyListeners, m_notifyPositionChanged

Fields inherited from class chesspresso.position.AbstractPosition

HASH_ALL_MASK, HASH_TOPLAY_MASK, HASH_TOPLAY_MULT, s_hashCastleMod, s_hashEPMod, s_hashMod

Fields inherited from interface chesspresso.position.ImmutablePosition

ALL_CASTLES, BLACK_CASTLE, BLACK_LONG_CASTLE, BLACK_SHORT_CASTLE, NO_CASTLES, WHITE_CASTLE, WHITE_LONG_CASTLE, WHITE_SHORT_CASTLE

Constructor Summary

LightWeightPosition()

LightWeightPosition(ImmutablePosition position)

Method Summary

boolean	canRedoMove()
boolean	canUndoMove()
void	doMove(short move)
int	getCastles() Return the still allowed castles as mask.
int	getHalfMoveClock() Return the number of moves since the last capture and the last pawn move.
Move	getLastMove()
short	getLastShortMove()
int	getPlyNumber() Return the current ply number.
int	getSqiEP() Return the current en passant square.
int	getStone(int sqi) Return the stone currently on the given square.
int	getToPlay() Return the player whose turn it is.
boolean	redoMove()
void	setCastles(int castles)
void	setHalfMoveClock(int halfMoveClock)
void	setPlyNumber(int plyNumber)
void	setSqiEP(int sqiEP)
void	setStone(int sqi, int stone)
void	setToPlay(int toPlay)
boolean	undoMove()

Methods inherited from class chesspresso.position.AbstractMutablePosition

addPositionChangeListener, addPositionListener, clear, excludeCastles, fireCastlesChanged, fireHalfMoveClockChanged, fireMoveDone, fireMoveUndone, firePlyNumberChanged, firePositionChanged, fireSqiEPChanged, fireSquareChanged, fireToPlayChanged, getColor, getPiece, incHalfMoveClock, includeCastles, inverse, isSquareEmpty, removePositionChangeListener, removePositionListener, resetHalfMoveClock, set, setNotifyListeners, setStart, toggleToPlay

Methods inherited from class chesspresso.position.AbstractPosition

equals, getFEN, getHashCode, getStartPositionHashCode, hashCode, isCastlePossible, isLegal, isSquarePossibleEPSquare, isStartPosition, isWhiteToPlay, toString, validate

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface chesspresso.position.ImmutablePosition

getFEN, getHashCode, hashCode, isLegal, isStartPosition, validate

Constructor Detail

LightWeightPosition

public LightWeightPosition()

LightWeightPosition

public LightWeightPosition(ImmutablePosition position)

Method Detail

getStone

public int getStone(int sqi)

Description copied from interface: ImmutablePosition

Return the stone currently on the given square.

Parameters:

sqi - the square

Returns:

the stone of the given square

getToPlay

public int getToPlay()

Description copied from interface: ImmutablePosition

Return the player whose turn it is.

Returns:

the player whose turn it is

getSqiEP

public int getSqiEP()

Description copied from interface: ImmutablePosition

Return the current en passant square.

Returns:

the current en passant square, NO_SQUARE if none

getCastles

public int getCastles()

Description copied from interface: ImmutablePosition

Return the still allowed castles as mask.

Returns:

the still allowed castles as mask.

getPlyNumber

public int getPlyNumber()

Description copied from interface: ImmutablePosition

Return the current ply number.

Returns:

the current ply number, starting at play no. 0

getHalfMoveClock

public int getHalfMoveClock()

Description copied from interface: ImmutablePosition

Return the number of moves since the last capture and the last pawn move. This number is used for the 50-move rule.

Returns:

the number of moves since the last capture and the last pawn move

setStone

public void setStone(int sqi,
                     int stone)

setCastles

public void setCastles(int castles)

setSqiEP

public void setSqiEP(int sqiEP)

setToPlay

public void setToPlay(int toPlay)

setPlyNumber

public void setPlyNumber(int plyNumber)

setHalfMoveClock

public void setHalfMoveClock(int halfMoveClock)

doMove

public void doMove(short move)
            throws IllegalMoveException

IllegalMoveException

canUndoMove

public boolean canUndoMove()

undoMove

public boolean undoMove()

getLastShortMove

public short getLastShortMove()
                       throws IllegalMoveException

IllegalMoveException

getLastMove

public Move getLastMove()
                 throws IllegalMoveException

IllegalMoveException

canRedoMove

public boolean canRedoMove()

redoMove

public boolean redoMove()