simulation.java

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      Collection moteXML = mote.getConfigXML();
      if (moteXML != null) {
        element.addContent(moteXML);
      }
      config.add(element);
    }

    return config;
  }

  /**
   * Sets the current simulation config depending on the given XML elements.
   *
   * @see #getConfigXML()
   * @param configXML
   *          Config XML elements
   * @param visAvailable
   *          True if simulation is allowed to show visualizers while loading
   *          the given config
   * @return True if simulation config set successfully
   * @throws Exception
   *           If configuration could not be loaded
   */
  public boolean setConfigXML(Collection<Element> configXML,
      boolean visAvailable) throws Exception {

    // Parse elements
    for (Element element : configXML) {

      // Title
      if (element.getName().equals("title")) {
        title = element.getText();
      }

      // Delay time
      if (element.getName().equals("delaytime")) {
        delayTime = Integer.parseInt(element.getText());
      }

      // Tick time
      if (element.getName().equals("ticktime")) {
        tickTime = Integer.parseInt(element.getText());
      }

      // Random seed
      if (element.getName().equals("randomseed")) {
        randomSeed = Long.parseLong(element.getText());
        delayMotesRandom.setSeed(randomSeed);
      }

      // Max mote startup delay
      if (element.getName().equals("motedelay")) {
        maxMoteStartupDelay = Integer.parseInt(element.getText());
      }

      // Radio medium
      if (element.getName().equals("radiomedium")) {
        String radioMediumClassName = element.getText().trim();
        Class<? extends RadioMedium> radioMediumClass = myGUI.tryLoadClass(
            this, RadioMedium.class, radioMediumClassName);

        if (radioMediumClass != null) {
          // Create radio medium specified in config
          try {
            currentRadioMedium = RadioMedium.generateRadioMedium(
                radioMediumClass, this);
          } catch (Exception e) {
            currentRadioMedium = null;
            logger.warn("Could not load radio medium class: "
                + radioMediumClassName);
          }
        }

        // Show configure simulation dialog
        boolean createdOK = false;
        if (visAvailable) {
          createdOK = CreateSimDialog.showDialog(GUI.getTopParentContainer(), this);
        } else {
          createdOK = true;
        }

        if (!createdOK) {
          logger.debug("Simulation not created, aborting");
          throw new Exception("Load aborted by user");
        }

        // Check if radio medium specific config should be applied
        if (radioMediumClassName
            .equals(currentRadioMedium.getClass().getName())) {
          currentRadioMedium.setConfigXML(element.getChildren(), visAvailable);
        } else {
          logger
              .info("Radio Medium changed - ignoring radio medium specific config");
        }
      }

      // Mote type
      if (element.getName().equals("motetype")) {
        String moteTypeClassName = element.getText().trim();

        Class<? extends MoteType> moteTypeClass = myGUI.tryLoadClass(this,
            MoteType.class, moteTypeClassName);

        if (moteTypeClass == null) {
          logger.fatal("Could not load mote type class: " + moteTypeClassName);
          return false;
        }

        MoteType moteType = moteTypeClass.getConstructor((Class[]) null)
            .newInstance();

        boolean createdOK = moteType.setConfigXML(this, element.getChildren(),
            visAvailable);
        if (createdOK) {
          addMoteType(moteType);
        } else {
          logger
              .fatal("Mote type was not created: " + element.getText().trim());
          throw new Exception("All mote types were not recreated");
        }
      }

      // Mote
      if (element.getName().equals("mote")) {
        Class<? extends Mote> moteClass = myGUI.tryLoadClass(this, Mote.class,
            element.getText().trim());

        Mote mote = moteClass.getConstructor((Class[]) null).newInstance((Object[]) null);
        if (mote.setConfigXML(this, element.getChildren(), visAvailable)) {
          addMote(mote);
        } else {
          logger.fatal("Mote was not created: " + element.getText().trim());
          throw new Exception("All motes were not recreated");
        }
      }
    }

    setChanged();
    notifyObservers(this);
    return true;
  }

  /**
   * Removes a mote from this simulation
   *
   * @param mote
   *          Mote to remove
   */
  public void removeMote(Mote mote) {

    if (isRunning()) {
      stopSimulation();
      motes.remove(mote);
      startSimulation();
    } else {
      motes.remove(mote);
    }

    myGUI.closeMotePlugins(mote);
    currentRadioMedium.unregisterMote(mote, this);

    this.setChanged();
    this.notifyObservers(this);
  }

  /**
   * Adds a mote to this simulation
   *
   * @param mote
   *          Mote to add
   */
  public void addMote(Mote mote) {
    if (isRunning()) {
      stopSimulation();
      motes.add(mote);
      startSimulation();
    } else {
      motes.add(mote);
    }

    if (maxMoteStartupDelay > 0 && mote.getInterfaces().getClock() != null) {
      mote.getInterfaces().getClock().setDrift(-delayMotesRandom.nextInt(maxMoteStartupDelay));
    }

    currentRadioMedium.registerMote(mote, this);
    this.setChanged();
    this.notifyObservers(this);
  }

  /**
   * Get a mote from this simulation.
   *
   * @param pos
   *          Internal list position of mote
   * @return Mote
   */
  public Mote getMote(int pos) {
    return motes.get(pos);
  }

  /**
   * Returns number of motes in this simulation.
   *
   * @return Number of motes
   */
  public int getMotesCount() {
    return motes.size();
  }

  /**
   * Returns all mote types in simulation.
   *
   * @return All mote types
   */
  public Vector<MoteType> getMoteTypes() {
    return moteTypes;
  }

  /**
   * Returns mote type with given identifier.
   *
   * @param identifier
   *          Mote type identifier
   * @return Mote type or null if not found
   */
  public MoteType getMoteType(String identifier) {
    for (MoteType moteType : getMoteTypes()) {
      if (moteType.getIdentifier().equals(identifier)) {
        return moteType;
      }
    }
    return null;
  }

  /**
   * Adds given mote type to simulation.
   *
   * @param newMoteType Mote type
   */
  public void addMoteType(MoteType newMoteType) {
    moteTypes.add(newMoteType);

    this.setChanged();
    this.notifyObservers(this);
  }

  /**
   * Set delay time to delayTime. When all motes have been ticked, the
   * simulation waits for this time before ticking again.
   *
   * @param delayTime
   *          New delay time (ms)
   */
  public void setDelayTime(int delayTime) {
    this.delayTime = delayTime;

    scheduleEvent(delayEvent, currentSimulationTime);

    this.setChanged();
    this.notifyObservers(this);
  }

  /**
   * Returns current delay time.
   *
   * @return Delay time (ms)
   */
  public int getDelayTime() {
    return delayTime;
  }

  /**
   * Set simulation time to simulationTime.
   *
   * @param simulationTime
   *          New simulation time (ms)
   */
  public void setSimulationTime(int simulationTime) {
    currentSimulationTime = simulationTime;

    this.setChanged();
    this.notifyObservers(this);
  }

  /**
   * Returns current simulation time.
   *
   * @return Simulation time (ms)
   */
  public int getSimulationTime() {
    return currentSimulationTime;
  }

  /**
   * Set tick time to tickTime. The tick time is the simulated time every tick
   * takes. When all motes have been ticked, current simulation time is
   * increased with tickTime. Default tick time is 1 ms.
   *
   * @see #getTickTime()
   * @see #getTickTimeInSeconds()
   * @param tickTime
   *          New tick time (ms)
   */
  public void setTickTime(int tickTime) {
    this.tickTime = tickTime;

    this.setChanged();
    this.notifyObservers(this);
  }

  /**
   * Changes radio medium of this simulation to the given.
   *
   * @param radioMedium
   *          New radio medium
   */
  public void setRadioMedium(RadioMedium radioMedium) {
    // Remove current radio medium from observing motes
    if (currentRadioMedium != null) {
      for (int i = 0; i < motes.size(); i++) {
        currentRadioMedium.unregisterMote(motes.get(i), this);
      }
    }

    // Change current radio medium to new one
    if (radioMedium == null) {
      logger.fatal("Radio medium could not be created!");
      return;
    }
    this.currentRadioMedium = radioMedium;

    // Add all current motes to the new radio medium
    for (int i = 0; i < motes.size(); i++) {
      currentRadioMedium.registerMote(motes.get(i), this);
    }
  }

  /**
   * Get currently used radio medium.
   *
   * @return Currently used radio medium
   */
  public RadioMedium getRadioMedium() {
    return currentRadioMedium;
  }

  /**
   * Get current tick time (ms).
   *
   * @see #setTickTime(int)
   * @return Current tick time (ms)
   */
  public int getTickTime() {
    return tickTime;
  }

  /**
   * Get current tick time (seconds).
   *
   * @see #setTickTime(int)
   * @return Current tick time (seconds)
   */
  public double getTickTimeInSeconds() {
    return (tickTime) / 1000.0;
  }

  /**
   * Return true is simulation is running.
   *
   * @return True if simulation is running
   */
  public boolean isRunning() {
    return isRunning && thread != null;
  }

  /**
   * Get current simulation title (short description).
   *
   * @return Title
   */
  public String getTitle() {
    return title;
  }

  /**
   * Set simulation title.
   *
   * @param title
   *          New title
   */
  public void setTitle(String title) {
    this.title = title;
  }

}