gcidfactory.java

pastry的java实现的2.0b版

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"FreePastry" Peer-to-Peer Application Development Substrate 

Copyright 2002, Rice University. All rights reserved.

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package rice.p2p.past.gc;

import java.util.*;

import rice.environment.random.RandomSource;
import rice.p2p.commonapi.*;

/**
 * @(#) GCIdFactory.java This class provides the ability to build Ids which can
 * support a multi-ring hierarchy.
 *
 * @version $Id: GCIdFactory.java 2551 2005-06-06 19:01:02Z jeffh $
 * @author Alan Mislove
 * @author Peter Druschel
 */
public class GCIdFactory implements IdFactory {

  /**
   * The underlying IdFactory
   */
  protected IdFactory factory;

  /**
   * Constructor
   *
   * @param factory the underlying factory to use
   */
  public GCIdFactory(IdFactory factory) {
    this.factory = factory;
  }

  /**
   * Returns the length a Id.toString should be.
   *
   * @return The correct length;
   */
  public int getIdToStringLength() {
    throw new UnsupportedOperationException("GCIdFactory cannot be used to build Ids!");
  }

  /**
   * Builds a protocol-specific Id given the source data.
   *
   * @param material The material to use
   * @return The built Id.
   */
  public Id buildNormalId(byte[] material) {
    throw new UnsupportedOperationException("GCIdFactory cannot be used to build Ids!");
  }

  /**
   * Builds a protocol-specific Id given the source data.
   *
   * @param material The material to use
   * @return The built Id.
   */
  public Id buildId(byte[] material) {
    throw new UnsupportedOperationException("GCIdFactory cannot be used to build Ids!");
  }

  /**
   * Builds a protocol-specific Id given the source data.
   *
   * @param material The material to use
   * @return The built Id.
   */
  public Id buildId(int[] material) {
    throw new UnsupportedOperationException("GCIdFactory cannot be used to build Ids!");
  }

  /**
   * Builds a protocol-specific Id by using the hash of the given string as
   * source data.
   *
   * @param string The string to use as source data
   * @return The built Id.
   */
  public Id buildId(String string) {
    throw new UnsupportedOperationException("GCIdFactory cannot be used to build Ids!");
  }

  /**
   * Builds a random protocol-specific Id.
   *
   * @param rng A random number generator
   * @return The built Id.
   */
  public Id buildRandomId(Random rng) {
    throw new UnsupportedOperationException("GCIdFactory cannot be used to build Ids!");
  }

  /**
   * DESCRIBE THE METHOD
   *
   * @param rng DESCRIBE THE PARAMETER
   * @return DESCRIBE THE RETURN VALUE
   */
  public Id buildRandomId(RandomSource rng) {
    throw new UnsupportedOperationException("GCIdFactory cannot be used to build Ids!");
  }

  /**
   * Builds an Id by converting the given toString() output back to an Id.
   * Should not normall be used.
   *
   * @param string The toString() representation of an Id
   * @return The built Id.
   */
  public Id buildIdFromToString(String string) {
    throw new UnsupportedOperationException("GCIdFactory cannot be used to build Ids!");
  }

  /**
   * Builds an Id by converting the given toString() output back to an Id.
   * Should not normally be used.
   *
   * @param chars The character array
   * @param offset The offset to start reading at
   * @param length The length to read
   * @return The built Id.
   */
  public Id buildIdFromToString(char[] chars, int offset, int length) {
    throw new UnsupportedOperationException("GCIdFactory cannot be used to build Ids!");
  }

  /**
   * Builds an IdRange based on a prefix. Any id which has this prefix should be
   * inside this IdRange, and any id which does not share this prefix should be
   * outside it.
   *
   * @param string The toString() representation of an Id
   * @return The built Id.
   */
  public IdRange buildIdRangeFromPrefix(String string) {
    throw new UnsupportedOperationException("GCIdFactory cannot be used to build Ids!");
  }

  /**
   * Builds a protocol-specific Id.Distance given the source data.
   *
   * @param material The material to use
   * @return The built Id.Distance.
   */
  public Id.Distance buildIdDistance(byte[] material) {
    throw new UnsupportedOperationException("GCIdFactory cannot be used to build IdDistances!");
  }

  /**
   * Creates an IdRange given the CW and CCW ids.
   *
   * @param cw The clockwise Id
   * @param ccw The counterclockwise Id
   * @return An IdRange with the appropriate delimiters.
   */
  public IdRange buildIdRange(Id cw, Id ccw) {
    return new GCIdRange(factory.buildIdRange(cw, ccw));
  }

  /**
   * Creates an empty IdSet.
   *
   * @return an empty IdSet
   */
  public IdSet buildIdSet() {
    return new GCIdSet(factory);
  }

  /**
   * Creates an empty IdSet.
   *
   * @param map DESCRIBE THE PARAMETER
   * @return an empty IdSet
   */
  public IdSet buildIdSet(SortedMap map) {
    //return new GCIdSet(factory.buildIdSet(new GCSortedMap(map)), factory);
    throw new UnsupportedOperationException("GCIdFactory.buildIDSet()");
  }

  /**
   * Creates an empty NodeHandleSet.
   *
   * @return an empty NodeHandleSet
   */
  public NodeHandleSet buildNodeHandleSet() {
    throw new UnsupportedOperationException("GCIdFactory cannot be used to build NodeHandleSets!");
  }

  /**
   * DESCRIBE THE CLASS
   *
   * @version $Id: pretty.settings 2305 2005-03-11 20:22:33Z jeffh $
   * @author jeffh
   */
  protected class GCSortedMap implements SortedMap {
    /**
     * DESCRIBE THE FIELD
     */
    protected SortedMap map;

    /**
     * Constructor for GCSortedMap.
     *
     * @param map DESCRIBE THE PARAMETER
     */
    public GCSortedMap(SortedMap map) {
      this.map = map;
    }

    /**
     * DESCRIBE THE METHOD
     *
     * @param key DESCRIBE THE PARAMETER
     * @return DESCRIBE THE RETURN VALUE
     */
    public Object get(Object key) {
      throw new UnsupportedOperationException("get not supported!");
    }

    /**
     * Gets the Empty attribute of the GCSortedMap object
     *
     * @return The Empty value
     */
    public boolean isEmpty() {
      throw new UnsupportedOperationException("isEmpty not supported!");
    }

    /**
     * DESCRIBE THE METHOD
     *
     * @return DESCRIBE THE RETURN VALUE
     */
    public Comparator comparator() {
      return null;
    }

    /**
     * DESCRIBE THE METHOD
     *
     * @return DESCRIBE THE RETURN VALUE
     */
    public Object firstKey() {
      throw new UnsupportedOperationException("firstKey not supported!");
    }

    /**
     * DESCRIBE THE METHOD
     *
     * @param toKey DESCRIBE THE PARAMETER
     * @return DESCRIBE THE RETURN VALUE
     */
    public SortedMap headMap(Object toKey) {
      throw new UnsupportedOperationException("headMap not supported!");
    }

    /**
     * DESCRIBE THE METHOD
     *
     * @return DESCRIBE THE RETURN VALUE
     */
    public Object lastKey() {
      throw new UnsupportedOperationException("lastKey not supported!");
    }

    /**
     * DESCRIBE THE METHOD
     *
     * @param fromKey DESCRIBE THE PARAMETER
     * @param toKey DESCRIBE THE PARAMETER
     * @return DESCRIBE THE RETURN VALUE
     */
    public SortedMap subMap(Object fromKey, Object toKey) {
      throw new UnsupportedOperationException("subMap not supported!");
    }

    /**
     * DESCRIBE THE METHOD
     *
     * @param fromKey DESCRIBE THE PARAMETER
     * @return DESCRIBE THE RETURN VALUE
     */
    public SortedMap tailMap(Object fromKey) {
      throw new UnsupportedOperationException("tailMap not supported!");
    }

    /**
     * DESCRIBE THE METHOD
     */
    public void clear() {
      throw new UnsupportedOperationException("clear not supported!");
    }

    /**
     * DESCRIBE THE METHOD
     *
     * @param key DESCRIBE THE PARAMETER
     * @return DESCRIBE THE RETURN VALUE
     */
    public boolean containsKey(Object key) {
      throw new UnsupportedOperationException("containsKey not supported!");
    }

    /**
     * DESCRIBE THE METHOD
     *
     * @param value DESCRIBE THE PARAMETER