/*
 * Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source 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, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.xmpp;

import java.io.IOException;
import java.net.URL;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.xml.namespace.QName;

import com.caucho.vfs.ReadStream;
import com.caucho.vfs.Vfs;

/*
 * XMPP protocol server
 */
public class XmppMarshalFactory
{
  private static final Logger log
    = Logger.getLogger(XmppMarshalFactory.class.getName());
  
  private ClassLoader _loader;

  private HashMap<QName,XmppMarshal> _unserializeMap
    = new HashMap<QName,XmppMarshal>();

  private HashMap<String,XmppMarshal> _serializeMap
    = new HashMap<String,XmppMarshal>();

  private javax.jms.Connection _jmsConn;
  
  public XmppMarshalFactory()
  {
    _loader = Thread.currentThread().getContextClassLoader();

    init();
  }

  ClassLoader getClassLoader()
  {
    return _loader;
  }

  public void init()
  {
    String resource = "META-INF/caucho/com.caucho.xmpp.XmppMarshal";

    try {
      Enumeration<URL> iter = _loader.getResources(resource);
    
      while (iter.hasMoreElements()) {
        URL url = iter.nextElement();

        ReadStream is = null;
        try {
          is = Vfs.lookup(url.toString()).openRead();

          loadMarshal(is);
        } catch (IOException e) {
          log.log(Level.WARNING, e.toString(), e);
        } finally {
          is.close();
        }
      }
    } catch (IOException e) {
      log.log(Level.WARNING, e.toString(), e);
    }
  }

  private void loadMarshal(ReadStream is)
    throws IOException
  {
    String line;

    while ((line = is.readLine()) != null) {
      int p = line.indexOf('#');

      if (p > 0)
        line = line.substring(0, p);
      
      line = line.trim();

      if (line.length() == 0)
        continue;

      try {
        String marshalClassName = line;

        Class cl = Class.forName(marshalClassName, false, _loader);
        XmppMarshal marshal = (XmppMarshal) cl.newInstance();

        QName qName = null;

        if (marshal.getNamespaceURI() != null
            && marshal.getLocalName() != null) {
          qName = new QName(marshal.getNamespaceURI(),
                            marshal.getLocalName(), "");
          _unserializeMap.put(qName, marshal);
        }

        String className = marshal.getClassName();
        if (className != null)
          _serializeMap.put(className, marshal);

        if (log.isLoggable(Level.FINEST))
          log.finest(this + " marshal: " + marshal + " " + qName + " " + className);
      } catch (Exception e) {
        log.log(Level.WARNING, e.toString(), e);
      }
    }
  }

  XmppMarshal getUnserialize(QName name)
  {
    return _unserializeMap.get(name);
  }

  XmppMarshal getSerialize(String name)
  {
    return _serializeMap.get(name);
  }
}