channelid.java

pastry的java实现的2.0b版

/*************************************************************************

"FreePastry" Peer-to-Peer Application Development Substrate 

Copyright 2002, Rice University. All rights reserved.

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package rice.p2p.splitstream;

import rice.p2p.commonapi.*;

/**
 * This class wraps the nodeId object so we can use type checking and allow more
 * readable and understandable code. All it does is subclass the nodeId and
 * provide a constructor that allows the wrapping of a NodeId object to create a
 * concrete subclass
 *
 * @version $Id: ChannelId.java 2302 2005-03-11 00:58:26Z jeffh $
 * @author Ansley Post
 * @author Alan Mislove
 */
public class ChannelId {

  /**
   * The underlying id for this channelid
   */
  protected Id id;

  /**
   * Constructor that takes in an Id and makes a ChannelId
   *
   * @param id The underlying id for this channelid
   */
  public ChannelId(Id id) {
    this.id = id;
  }

  /**
   * Constructor that takes in a String and makes a ChannelId
   *
   * @param name The name to create this channelId from
   */
  public ChannelId(String name) {
    this.id = null;
  }

  /**
   * Gets the Id attribute of the ChannelId object
   *
   * @return The Id value
   */
  public Id getId() {
    return id;
  }

  /**
   * DESCRIBE THE METHOD
   *
   * @return DESCRIBE THE RETURN VALUE
   */
  public String toString() {
    return "[ChannelId " + id + "]";
  }

  /**
   * DESCRIBE THE METHOD
   *
   * @return DESCRIBE THE RETURN VALUE
   */
  public int hashCode() {
    return id.hashCode();
  }

  /**
   * DESCRIBE THE METHOD
   *
   * @param o DESCRIBE THE PARAMETER
   * @return DESCRIBE THE RETURN VALUE
   */
  public boolean equals(Object o) {
    if (!(o instanceof ChannelId)) {
      return false;
    }

    return ((ChannelId) o).id.equals(id);
  }
}