rootmove.java

ErGo是一个很早的Java通用围棋服务器(IGS/NNGS)客户端程序。有全部源码和文档

package ergo.logic;

// $Id: RootMove.java,v 1.2 1999/08/13 01:17:49 sigue Exp $

/*
 *  Copyright (C) 1999  Carl L. Gay and Antranig M. Basman.
 *  See the file copyright.txt, distributed with this software,
 *  for further information.
 */

import ergo.util.*;
import java.io.PrintWriter;


// There should only be one instance of this class per game.
// The root move is just used for holding variations on the first
// move of the game.  

public final class RootMove extends Move {

  RootMove () {
    // super(parent, timeleft, moveNumber, color, isVariation)
    super(null, 0, -1, Move.WHITE, false);
  }

  public String toString () { return "---"; }

  public PositionVector placedPositions (int x) { return null; }

  // I don't think this will ever be called for the root move.
  public boolean isLegal (Game g, boolean fast, ILMV result) {
    if (parent == null)
      return true;
    else {
      result.failureReason = "The root move cannot have a parent.";
      return false;
    }
  }

  public void commit () {
  }

  public boolean equals (Move m) { return m == this; }

  public SimpleGroupVector capturedGroups () {
    return null;
  }

  public int numberOfStones () { return 0; }

  public boolean occupiesPosition (Position pos) {
    return false;
  }

}