/*--- formatted by Jindent 2.1, (www.c-lab.de/~jindent) ---*/

/**
 * ***************************************************************
 * The LEAP libraries, when combined with certain JADE platform components,
 * provide a run-time environment for enabling FIPA agents to execute on
 * lightweight devices running Java. LEAP and JADE teams have jointly
 * designed the API for ease of integration and hence to take advantage
 * of these dual developments and extensions so that users only see
 * one development platform and a
 * single homogeneous set of APIs. Enabling deployment to a wide range of
 * devices whilst still having access to the full development
 * environment and functionalities that JADE provides.
 * Copyright (C) 2001 Telecom Italia LAB S.p.A.
 * Copyright (C) 2001 Motorola.
 * 
 * GNU Lesser General Public License
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation,
 * version 2.1 of the License.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA  02111-1307, USA.
 * **************************************************************
 */
package jade.imtp.leap.http;

import jade.mtp.TransportAddress;
import jade.imtp.leap.TransportProtocol;
import jade.imtp.leap.ICP;
import jade.imtp.leap.ICPException;

import java.util.Vector;

/**
 * Class declaration
 * @author Giovanni Caire - TILAB
 * @author Ronnie Taib - Motorola
 * @author Steffen Rusitschka - Siemens
 */
public class HTTPProtocol extends TransportProtocol {

  /**
   * The protocol's name, as used in a URL protocol field.
   */
  public static final String NAME = "http";
  public static final int    DEFAULT_PORT = 80;

  private static HTTPProtocol theInstance = new HTTPProtocol();
  
  public static HTTPProtocol getInstance() {
  	return theInstance;
  }
  
  /**
   */
  public String addrToString(TransportAddress ta) throws ICPException {

    // Check that the specified ta is actually a JICP address
    HTTPAddress hta = null;

    try {
      hta = (HTTPAddress) ta;
    } 
    catch (ClassCastException cce) {
      throw new ICPException("The TransportAddress "+ta.toString()+" is not an HTTP Address");
    } 
		
    return hta.toString();
  } 

  /**
   */
  public TransportAddress stringToAddr(String s) throws ICPException {
    Vector  addressFields = parseURL(s);
    String protocol = (String) addressFields.elementAt(0);

    if (!NAME.equals(protocol)) {
      throw new ICPException("Unexpected protocol \""+protocol+"\" when \""+NAME+"\" was expected.");
    } 

    String host = (String) addressFields.elementAt(1);
    String port = (String) addressFields.elementAt(2);
    String file = (String) addressFields.elementAt(3);
    String anchor = (String) addressFields.elementAt(4);

    return new HTTPAddress(host, port, file, anchor);
  } 

  /**
   */
  public TransportAddress buildAddress(String host, String port, String file, String anchor) {
    return new HTTPAddress(host, port, file, anchor);
  } 

  /**
   * Method declaration
   * @return
   * @see
   */
  public String getName() {
    return NAME;
  } 

}