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

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Here is the source code for de.schildbach.game.chess.ChessMove.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 org.apache.commons.lang.ObjectUtils;

import de.schildbach.game.Coordinate;
import de.schildbach.game.Piece;
import de.schildbach.game.common.ChessLikeMove;

/**
 * @author Andreas Schildbach
 */
public class ChessMove extends ChessLikeMove {
    private Class<? extends Piece> promotionPiece = null;

    /**
     * Main constructor.
     */
    public ChessMove(Coordinate source, Coordinate target) {
        super(source, target);
    }

    /**
     * Constructor for promotions.
     */
    public ChessMove(Coordinate source, Coordinate target, Class<? extends Piece> promotionPiece) {
        this(source, target);
        assert promotionPiece != null : "promotionPiece is null";
        this.promotionPiece = promotionPiece;
    }

    /**
     * Default constructor, needed for serialization.
     */
    protected ChessMove() {
    }

    public Class<? extends Piece> getPromotionPiece() {
        return promotionPiece;
    }

    @Override
    public boolean equals(Object o) {
        ChessMove other = (ChessMove) o;
        if (!super.equals(other))
            return false;
        if (!ObjectUtils.equals(this.promotionPiece, other.promotionPiece))
            return false;
        return true;
    }

    @Override
    public int hashCode() {
        int hashCode = super.hashCode();
        hashCode *= 37;
        hashCode += ObjectUtils.hashCode(promotionPiece);
        return hashCode;
    }

    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder(super.toString());
        if (promotionPiece != null) {
            builder.append("(");
            builder.append(promotionPiece);
            builder.append(")");
        }
        return builder.toString();
    }
}