sensormotes.java

nesC写的heed算法

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 * All rights reserved.
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package net.tinyos.task.taskviz.sensor;

import java.util.Hashtable;
import java.util.Vector;

/**
 * This class maintains the list of all the sensor motes
 */
public class SensorMotes extends Hashtable {

  private Hashtable ids = new Hashtable();
  private boolean needSave = false;

  /**
   * Simple constructor that creates an empty motes list
   */
  public SensorMotes() {
    super();
  }

  /**
   * Adds a mote to the list
   *
   * @param mote Mote being added
   */
  public void addMote(SensorMote mote) {
    put(mote.getEllipse(), mote);
    ids.put(new Integer(mote.getId()), mote);
    needSave = true;
  }

  /**
   * Removes a mote from the list
   *
   * @param mote Mote being removed
   */
  public void removeMote(SensorMote mote) {
    remove(mote.getEllipse());
    ids.remove(new Integer(mote.getId()));
    needSave = true;
  }

  /**
   * Returns the number of motes in the list
   *
   * @return Number of motes in the list
   */
  public int numMotes() {
    return size();
  }

  /**
   * Returns whether the given id has already been used
   *
   * @param id Id to check
   * @return Whether the id has already been used
   */
  public boolean idExists(int id) {
    return ids.containsKey(new Integer(id));
  }

  /**
   * Returns the mote with the given integer id
   * 
   * @param id Integer id of the mote to return
   * @return Mote with the given id
   */
  public SensorMote getMote(int id) {
    return (SensorMote)ids.get(new Integer(id));
  }

  /**
   * This method should be called when the motes list has been saved
   */
  public void saved() {
    needSave = false;
  }

  /**
   * This method indicates whether the motes list needs saving or not
   * 
   * @return Whether the motes list needs saving or not
   */
  public boolean needsSave() {
    return needSave;
  }
}