/*  Position - A interface to implement the position of one piece of              a chess game.  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.position;/** * This interface has to be implemented by any chess position. */public interface Position {    // Methods    /**     * Get the square index of this position instance.     *     * @return The square index of this piece position (0-63).     */    int getSquareIndex();    /**     * The square index of this position instance.     *     * @param index The square index of this position (0-63).     */    void setSquareIndex( int index);      /**     * Get the row index of this position.     *     * @return The row index of this position (0-7).     */    int getRowIndex();    /**     * Get the line index of this position.     *     * @return The line index of this position (0-7).     */    int getLineIndex();    /**     * Get the name of this square.     *     * @return The suare name of this position (i.e. a4).     */    String toSquareName();    /**     * Test if 2 positions are equal.     *     * @param Another position.     *     * @return true, if the positions are equal, false otherwise.     */    boolean equals( Position pos);}