/*  CastlingPlyImpl - A class that implements a castling ply.  Copyright (C) 2003 The Java-Chess team <info@java-chess.de>  This program is free software; you can redistribute it and/or  modify it under the terms of the GNU General Public License  as published by the Free Software Foundation; either version 2  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 General Public License for more details.  You should have received a copy of the GNU General Public License  along with this program; if not, write to the Free Software  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.*/ package de.java_chess.javaChess.ply;import de.java_chess.javaChess.position.*;/** * This class represents a castling. */public class CastlingPlyImpl extends PlyImpl implements CastlingPly {    // Instance variables    /**     * Flag to indicate, if this ply goes to the left.     */    private boolean _goesLeft;    // Constructors    /**     * Construct a new castling ply from a source and a destination      * and the direction.     *     * @param source The source of the ply.     * @param destination The destination of the ply.     * @param goesLeft Flag to indicate if the castling goes left.     */    public CastlingPlyImpl( Position source, boolean goesLeft) {	super( source, new PositionImpl( -1), false);	setLeftCastling( goesLeft);    }        // Methods    /**     * Check, if this castling goes to the left side of the board.     *     * @return true, if the castling goes to the left side, false otherwise.     */    public final boolean isLeftCastling() {	return _goesLeft;    }    /**     * Set the flag, if the castling goes left.     *     * @param goesLeft Flag to indicate if the castling goes left.     */    public final void setLeftCastling( boolean goesLeft) {	_goesLeft = goesLeft;    }    /**     * Get a string representation of this castling.     *     * @return A string representation of this ply.     */    public final String toString() {	return isLeftCastling() ? "O-O-O" : "O-O";    }}