nodedirset.java

来自「ALGAE是一个快速创建算法演示的框架。目前支持的算法实现语言包括java和c」· Java 代码 · 共 72 行

package edu.odu.cs.zeil.AlgAE.Client.DataViewer;

import java.util.Hashtable;
import edu.odu.cs.zeil.AlgAE.Client.DataViewer.DataGraph.Node;


public class NodeDirSet
{
  private Hashtable table;

  public NodeDirSet()
  {
    table = new Hashtable();
  }


  class NodeDir 
  {
    public Node source;
    public int dir;

    public NodeDir (Node s, int d)
    {
      source = s;
      dir = d;
    }

    public boolean equals (Object o)
    {
      try {
	NodeDir nd = (NodeDir)o;
	return (source == nd.source) && (dir == nd.dir);
      }
      catch (ClassCastException e) {
        return false;
      }
    }

    public int hashCode()
    {
      return 3*source.ID().hashCode() + dir;
    }
  }
  

  public void add (Node source, int dir)
  {
    NodeDir nd = new NodeDir(source, dir);
    table.put (nd, nd);
  }
  

  public void remove (Node source, int dir)
  {
    NodeDir nd = new NodeDir(source, dir);
    table.remove (nd);
  }
  

  public boolean contains (Node source, int dir)
  {
    NodeDir nd = new NodeDir(source, dir);
    return table.contains (nd);
  }
  

  public void clear()
  {
    table = new Hashtable();
  }
}