de.schildbach.game.chess.ChessPosition.java Source code

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Here is the source code for de.schildbach.game.chess.ChessPosition.java

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/*
 * Copyright 2001-2011 the original author or authors.
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package de.schildbach.game.chess;

import java.util.Arrays;

import org.apache.commons.lang.ObjectUtils;

import de.schildbach.game.Board;
import de.schildbach.game.Coordinate;

/**
 * @author Andreas Schildbach
 */
public class ChessPosition extends ChessLikePosition {
    private boolean castlingAvailableWhite[];
    private boolean castlingAvailableBlack[];
    private Coordinate enPassantTargetSquare;

    public ChessPosition(Board board) {
        super(board);
        castlingAvailableWhite = new boolean[2];
        castlingAvailableBlack = new boolean[2];
    }

    public Coordinate getEnPassantTargetSquare() {
        return enPassantTargetSquare;
    }

    public void setEnPassantTargetSquare(Coordinate enPassantTargetSquare) {
        this.enPassantTargetSquare = enPassantTargetSquare;
    }

    public boolean getCastlingAvailable(int color, CastlingSide side) {
        int i = side == CastlingSide.QUEENSIDE ? 0 : 1;
        return color == 0 ? castlingAvailableWhite[i] : castlingAvailableBlack[i];
    }

    public void setCastlingAvailable(int color, CastlingSide side, boolean castlingAvailable) {
        int i = side == CastlingSide.QUEENSIDE ? 0 : 1;
        if (color == 0)
            this.castlingAvailableWhite[i] = castlingAvailable;
        else
            this.castlingAvailableBlack[i] = castlingAvailable;
    }

    @Override
    public boolean equals(Object o) {
        if (o == null)
            return false;

        if (!super.equals(o))
            return false;

        ChessPosition other = (ChessPosition) o;

        if (!Arrays.equals(castlingAvailableWhite, other.castlingAvailableWhite))
            return false;

        if (!Arrays.equals(castlingAvailableBlack, other.castlingAvailableBlack))
            return false;

        if (!ObjectUtils.equals(this.enPassantTargetSquare, other.enPassantTargetSquare))
            return false;

        return true;
    }

    @Override
    public int hashCode() {
        int hashCode = super.hashCode();
        hashCode *= 37;
        hashCode += Arrays.hashCode(castlingAvailableWhite);
        hashCode *= 37;
        hashCode += Arrays.hashCode(castlingAvailableBlack);
        hashCode *= 37;
        hashCode += ObjectUtils.hashCode(enPassantTargetSquare);
        return hashCode;
    }

    @Override
    public Object clone() {
        ChessPosition clone = (ChessPosition) super.clone();
        clone.castlingAvailableWhite = (boolean[]) this.castlingAvailableWhite.clone();
        clone.castlingAvailableBlack = (boolean[]) this.castlingAvailableBlack.clone();
        return clone;
    }
}