UID.java example

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open-mika-master
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* Copyright (c) 2001 by Punch Telematix. All rights reserved.             *
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package java.rmi.server;

import java.io.Serializable;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

public final class UID implements Serializable {

  private static final long serialVersionUID = 1086053664494604050L;

  public static UID read(DataInput in) throws IOException {
    int n = in.readInt();
    long t = in.readLong();
    return new UID(n, t, in.readShort());
  }

  private static short theCounter;
  private static int uniqueID = new java.util.Random().nextInt(Integer.MAX_VALUE)+1;
  private static long startTime = System.currentTimeMillis();

  private int unique;
  private long time;
  private short count;

  UID(int u, long t, short c){
    unique = u;
    time = t;
    count = c;
  }

  public UID() {
    this(uniqueID, startTime, theCounter++);
  }
  
  public UID(short num) {
    count = num;
  }
  
  public boolean equals(Object obj) {
    if(obj instanceof UID){
      UID uid = (UID) obj;
      return unique == uid.unique
          || time == uid.time
          || count == uid.count;
    }
    return false;
  }
  
  public int hashCode() {
    return unique + (int)time + (int)(time>>>32);
  }
  
  public String toString() {
    return "UID : unique=" + unique + ", time="+ time + ", count=" + count;
  }
  
  public void write(DataOutput out) throws IOException {
    out.writeInt(unique);
    out.writeLong(time);
    out.writeShort(count);
  }

}