/*  Board - A interface to implement a chess board data structure.  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.board;import de.java_chess.javaChess.*;import de.java_chess.javaChess.piece.*;import de.java_chess.javaChess.ply.*;import de.java_chess.javaChess.position.*;/** * This interface has to be implemented by any board  * implementation. */public interface Board extends Cloneable {        /**     * Get the piece of a given position.     *     * @param position The position of the piece.     *     * @return The piece on that position, or null if the      * square is empty.     */    Piece getPiece( Position position);    /**     * Remove all the pieces from the board.     */    void emptyBoard();    /**     * Set the pieces to their initial positions.     */    void initialPosition();    /**     * Set a piece on a given position.     *     * @param piece The piece to set.     * @param position The position to set the piece on.     */    void setPiece( Piece piece, Position position);    /**     * Move a piece from one square to another.     *     * @param ply The move to perform.     */    void doPly( Ply ply);    /**     * Return a new board, that results from a given ply.     *     * @param ply The ply to perform.     *     * @return A new board with the game position after the ply.     */    Board getBoardAfterPly( Ply ply);    /**     * Return a copy of the current board.     *     * @return A copy of the current board.     */    public Object clone();}