nodehandleset.java

pastry的java实现的2.0b版

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"FreePastry" Peer-to-Peer Application Development Substrate 

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package rice.p2p.commonapi;

import java.io.*;
import java.util.*;

import rice.p2p.commonapi.rawserialization.OutputBuffer;

/**
 * @(#) NodeHandleSet.java An interface to a generic set of node handles.
 *
 * @version $Id: NodeHandleSet.java 3274 2006-05-15 16:17:47Z jeffh $
 * @author Jeff Hoye
 * @author Alan Mislove
 */
public interface NodeHandleSet extends Serializable {

  /**
   * Puts a NodeHandle into the set.
   *
   * @param handle the handle to put.
   * @return true if the put succeeded, false otherwise.
   */
  public boolean putHandle(NodeHandle handle);

  /**
   * Finds the NodeHandle associated with the NodeId.
   *
   * @param id a node id.
   * @return the handle associated with that id or null if no such handle is
   *      found.
   */
  public NodeHandle getHandle(Id id);

  /**
   * Gets the ith element in the set.
   *
   * @param i an index.
   * @return the handle associated with that id or null if no such handle is
   *      found.
   */
  public NodeHandle getHandle(int i);

  /**
   * Verifies if the set contains this particular id.
   *
   * @param id a node id.
   * @return true if that node id is in the set, false otherwise.
   */
  public boolean memberHandle(Id id);

  /**
   * Removes a node id and its handle from the set.
   *
   * @param id DESCRIBE THE PARAMETER
   * @return the node handle removed or null if nothing.
   */
  public NodeHandle removeHandle(Id id);

  /**
   * Gets the size of the set.
   *
   * @return the size.
   */
  public int size();

  /**
   * Gets the index of the element with the given node id.
   *
   * @param id the id.
   * @return the index or throws a NoSuchElementException.
   * @exception NoSuchElementException DESCRIBE THE EXCEPTION
   */
  public int getIndexHandle(Id id) throws NoSuchElementException;

  /**
   * DESCRIBE THE METHOD
   *
   * @param buf DESCRIBE THE PARAMETER
   * @exception IOException DESCRIBE THE EXCEPTION
   */
  public void serialize(OutputBuffer buf) throws IOException;

  /**
   * Gets the Type attribute of the NodeHandleSet object
   *
   * @return The Type value
   */
  public short getType();
}