/*  BitBoard - A interface to implement a chess board data structure as             layered bitmaps.  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.bitboard;import de.java_chess.javaChess.board.*;/** * This interface defines the methods to be implemented by any  * bitboard implementation. */public interface BitBoard extends Board {        // Static constants.    public final static long _LINE_A = 0x0101010101010101L;    public final static long _LINE_B = 0x0202020202020202L;    public final static long _LINE_C = 0x0404040404040404L;    public final static long _LINE_D = 0x0808080808080808L;    public final static long _LINE_E = 0x1010101010101010L;    public final static long _LINE_F = 0x2020202020202020L;    public final static long _LINE_G = 0x4040404040404040L;    public final static long _LINE_H = 0x8080808080808080L;    public final static long _NOT_LINE_A = ~_LINE_A;    public final static long _NOT_LINE_B = ~_LINE_B;    public final static long _NOT_LINE_C = ~_LINE_C;    public final static long _NOT_LINE_D = ~_LINE_D;    public final static long _NOT_LINE_E = ~_LINE_E;    public final static long _NOT_LINE_F = ~_LINE_F;    public final static long _NOT_LINE_G = ~_LINE_G;    public final static long _NOT_LINE_H = ~_LINE_H;    public final static long _ROW_1 = 0x00000000000000FFL;    public final static long _ROW_2 = 0x000000000000FF00L;    public final static long _ROW_3 = 0x0000000000FF0000L;    public final static long _ROW_4 = 0x00000000FF000000L;    public final static long _ROW_5 = 0x000000FF00000000L;    public final static long _ROW_6 = 0x0000FF0000000000L;    public final static long _ROW_7 = 0x00FF000000000000L;    public final static long _ROW_8 = 0xFF00000000000000L;    public final static long _NOT_ROW_1 = ~_ROW_1;    public final static long _NOT_ROW_2 = ~_ROW_2;    public final static long _NOT_ROW_3 = ~_ROW_3;    public final static long _NOT_ROW_4 = ~_ROW_4;    public final static long _NOT_ROW_5 = ~_ROW_5;    public final static long _NOT_ROW_6 = ~_ROW_6;    public final static long _NOT_ROW_7 = ~_ROW_7;    public final static long _NOT_ROW_8 = ~_ROW_8;    // Methods    /**     * Get the position of some pieces as a long (64 bit wide) bitmask.     *     * @param pieceTypeColor The color and type of the pieces.     *     * @return A bitmask with the positions of these pieces.     */    long getPositionOfPieces( int pieceTypeColor);    /**     * Get the position of all empty squares.     *     * @return The position of all empty squares.     */    long getEmptySquares();    /**     * Get all white or black pieces.     *     * @param white true, if the white pieces are requested,      *              false for the black pieces.     */    long getAllPiecesForColor( boolean white);    /**     * Get the board as a byte stream.     *     * @return The board as a array of bytes.     */    byte [] getBytes();}