fragmentkeyrange.java

pastry的java实现的2.0b版

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

"FreePastry" Peer-to-Peer Application Development Substrate 

Copyright 2002, Rice University. All rights reserved.

Redistribution and use in source and binary forms, with or without
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- Redistributions of source code must retain the above copyright
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- Redistributions in binary form must reproduce the above copyright
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documentation and/or other materials provided with the distribution.

- Neither  the name  of Rice  University (RICE) nor  the names  of its
contributors may be  used to endorse or promote  products derived from
this software without specific prior written permission.

This software is provided by RICE and the contributors on an "as is"
basis, without any representations or warranties of any kind, express
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********************************************************************************/
package rice.p2p.glacier;

import java.io.*;
import java.util.*;
import rice.p2p.commonapi.*;
import rice.p2p.commonapi.rawserialization.*;

/**
 * DESCRIBE THE CLASS
 *
 * @version $Id: FragmentKeyRange.java 3274 2006-05-15 16:17:47Z jeffh $
 * @author ahae
 */
public class FragmentKeyRange implements IdRange {

  /**
   * The actual IdRange
   */
  protected IdRange range;

  /**
   * Constructor
   *
   * @param range DESCRIBE THE PARAMETER
   */
  protected FragmentKeyRange(IdRange range) {
    this.range = range;
  }

  /**
   * get counterclockwise edge of range
   *
   * @return the id at the counterclockwise edge of the range (inclusive)
   */
  public Id getCCWId() {
    return new FragmentKey(new VersionKey(range.getCCWId(), 0L), 0);
  }

  /**
   * get clockwise edge of range
   *
   * @return the id at the clockwise edge of the range (exclusive)
   */
  public Id getCWId() {
    return new FragmentKey(new VersionKey(range.getCWId(), 0L), 0);
  }

  /**
   * get the complement of this range
   *
   * @return This range's complement
   */
  public IdRange getComplementRange() {
    throw new RuntimeException("FragmentKeyRange.getComplementRange() is not supported!");
  }

  /**
   * returns whether or not this range is empty
   *
   * @return Whether or not this range is empty
   */
  public boolean isEmpty() {
    return range.isEmpty();
  }

  /**
   * test if a given key lies within this range
   *
   * @param key the key
   * @return true if the key lies within this range, false otherwise
   */
  public boolean containsId(Id key) {
    return range.containsId(((FragmentKey) key).key.id);
  }

  /**
   * merges the given range with this range
   *
   * @param merge DESCRIBE THE PARAMETER
   * @return The merge
   */
  public IdRange mergeRange(IdRange merge) {
    throw new RuntimeException("FragmentKeyRange.mergeRange() is not supported!");
  }

  /**
   * diffs the given range with this range
   *
   * @param diff DESCRIBE THE PARAMETER
   * @return The merge
   */
  public IdRange diffRange(IdRange diff) {
    throw new RuntimeException("FragmentKeyRange.diffRange() is not supported!");
  }

  /**
   * intersects the given range with this range
   *
   * @param intersect DESCRIBE THE PARAMETER
   * @return The merge
   */
  public IdRange intersectRange(IdRange intersect) {
    throw new RuntimeException("FragmentKeyRange.intersectRange() is not supported!");
  }

  /**
   * Determines equality
   *
   * @param o DESCRIBE THE PARAMETER
   * @return Equals
   */
  public boolean equals(Object o) {
    throw new RuntimeException("FragmentKeyRange.equals() is not supported!");
  }

  /**
   * Returns the hashCode
   *
   * @return hashCode
   */
  public int hashCode() {
    throw new RuntimeException("FragmentKeyRange.hashCode() is not supported!");
  }

  /**
   * Prints out the string
   *
   * @return A string
   */
  public String toString() {
    throw new RuntimeException("FragmentKeyRange.toString() is not supported!");
  }

  /**
   * DESCRIBE THE METHOD
   *
   * @param buf DESCRIBE THE PARAMETER
   * @param endpoint DESCRIBE THE PARAMETER
   * @exception IOException DESCRIBE THE EXCEPTION
   */
  public void FragmentKeyRange(InputBuffer buf, Endpoint endpoint) throws IOException {
    range = endpoint.readIdRange(buf);
  }

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