/*
** Apollo - Test Skeleton Toolkit for Web Start/JNLP
** Copyright (c) 2001, 2002, 2003 by Gerald Bauer
**
** This program is free software.
**
** You may redistribute it and/or modify it under the terms of the GNU
** General Public License as published by the Free Software Foundation.
** Version 2 of the license should be included with this distribution in
** the file LICENSE, as well as License.html. If the license is not
** included with this distribution, you may find a copy at the FSF web
** site at 'www.gnu.org' or 'www.fsf.org', or you may write to the
** Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139 USA.
**
** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
** REDISTRIBUTION OF THIS SOFTWARE.
**
*/

package apollo;

import apollo.dev.*;
import apollo.jnlp.*;
import apollo.spi.*;

// todo: should I throw ServiceNotAvailable exceptions?

public class ServiceManager
{

   private static ServiceManager _instance;
   private ServiceResolver _resolver;

   private ServiceManager()
   {
      // check if we are running under webstart
      try
      {
         Class clazz = Class.forName( "javax.jnlp.ServiceManager" );

         _resolver = new JnlpServiceResolver( new DevServiceResolver() );
      }
      catch( ClassNotFoundException ex )
      {
         _resolver = new DevServiceResolver();
      }
   }

   private static ServiceManager getServiceManager()
   {
      if( _instance == null )
         _instance = new ServiceManager();

      return _instance;
   }

   private ServiceResolver getResolver()
   {
      return _resolver;
   }

   public static BasicService lookupBasicService()
   {
      return getServiceManager().getResolver().lookupBasicService();
   }

   public static ClipboardService lookupClipboardService()
   {
      return getServiceManager().getResolver().lookupClipboardService();
   }

   public static FileOpenService lookupFileOpenService()
   {
      return getServiceManager().getResolver().lookupFileOpenService();
   }

   public static FileSaveService lookupFileSaveService()
   {
      return getServiceManager().getResolver().lookupFileSaveService();
   }

   public static PersistenceService lookupPersistenceService()
   {
      return getServiceManager().getResolver().lookupPersistenceService();
   }

   public static PrintService lookupPrintService()
   {
      return getServiceManager().getResolver().lookupPrintService();
   }
}