/*PLEASE DO NOT EDIT THIS CODE*/
/*This code was generated using the UMPLE @UMPLE_VERSION@ modeling language!*/

package example;
import java.util.*;
import java.lang.Thread;

public class GarageDoor implements Runnable
{

  //------------------------
  // MEMBER VARIABLES
  //------------------------

  //GarageDoor State Machines
  public enum Status { Open, Closing, Closed, Opening, HalfOpen }
  private Status status;
  
  //enumeration type of messages accepted by GarageDoor
  protected enum MessageType { buttonOrObstacle_M, reachBottom_M, reachTop_M }
  
  MessageQueue queue;
  Thread removal;

  //------------------------
  // CONSTRUCTOR
  //------------------------

  public GarageDoor()
  {
    setStatus(Status.Open);
    queue = new MessageQueue();
    removal=new Thread(this);
    //start the thread of GarageDoor
    removal.start();
  }

  //------------------------
  // INTERFACE
  //------------------------

  public String getStatusFullName()
  {
    String answer = status.toString();
    return answer;
  }

  public Status getStatus()
  {
    return status;
  }

  public boolean _buttonOrObstacle()
  {
    boolean wasEventProcessed = false;
    
    Status aStatus = status;
    switch (aStatus)
    {
      case Open:
        setStatus(Status.Closing);
        wasEventProcessed = true;
        break;
      case Closing:
        setStatus(Status.Opening);
        wasEventProcessed = true;
        break;
      case Closed:
        setStatus(Status.Opening);
        wasEventProcessed = true;
        break;
      case Opening:
        setStatus(Status.HalfOpen);
        wasEventProcessed = true;
        break;
      case HalfOpen:
        setStatus(Status.Opening);
        wasEventProcessed = true;
        break;
      default:
        // Other states do respond to this event
    }

    return wasEventProcessed;
  }

  public boolean _reachBottom()
  {
    boolean wasEventProcessed = false;
    
    Status aStatus = status;
    switch (aStatus)
    {
      case Closing:
        setStatus(Status.Closed);
        wasEventProcessed = true;
        break;
      default:
        // Other states do respond to this event
    }

    return wasEventProcessed;
  }

  public boolean _reachTop()
  {
    boolean wasEventProcessed = false;
    
    Status aStatus = status;
    switch (aStatus)
    {
      case Opening:
        setStatus(Status.Open);
        wasEventProcessed = true;
        break;
      default:
        // Other states do respond to this event
    }

    return wasEventProcessed;
  }

  private void setStatus(Status aStatus)
  {
    status = aStatus;
  }

  public void delete()
  {
    removal.interrupt();
  }

  protected class Message
  {
    MessageType type;
    
    //Message parameters
    Vector<Object> param;
    
    public Message(MessageType t, Vector<Object> p)
    {
      type = t; 
      param = p;
    }

    @Override
    public String toString()
    {
      return type + "," + param;
    }
  }
  
  protected class MessageQueue {
    Queue<Message> messages = new LinkedList<Message>();
    
    public synchronized void put(Message m)
    {
      messages.add(m); 
      notify();
    }

    public synchronized Message getNext()
    {
      try {
        while (messages.isEmpty()) 
        {
          wait();
        }
      } catch (InterruptedException e) {
        Thread.currentThread().interrupt();
        return null;
      }

      //The element to be removed
      Message m = messages.remove(); 
      return (m);
    }
  }

  //------------------------------
  //messages accepted 
  //------------------------------

  public void buttonOrObstacle ()
  {
    queue.put(new Message(MessageType.buttonOrObstacle_M, null));
  }

  public void reachBottom ()
  {
    queue.put(new Message(MessageType.reachBottom_M, null));
  }

  public void reachTop ()
  {
    queue.put(new Message(MessageType.reachTop_M, null));
  }

  
  @Override
  public void run ()
  {
    boolean status=false;
    while (true) 
    {
      Message m = queue.getNext();
      if(m == null)  return;
      
      switch (m.type)
      {
        case buttonOrObstacle_M:
          status = _buttonOrObstacle();
          break;
        case reachBottom_M:
          status = _reachBottom();
          break;
        case reachTop_M:
          status = _reachTop();
          break; 
        default:
      }
      if(!status)
      {
        // Error message is written or  exception is raised
      }
    }
  }
}
