content: /* ========================================================================
   * JCommon : a free general purpose class library for the Java(tm) platform
   * ========================================================================
   *
   * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
   * 
   * Project Info:  http://www.jfree.org/jcommon/index.html
   *
   * 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; either version 2.1 of the License, or 
   * (at your option) any later version.
   *
   * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
   * USA.  
   *
   * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
   * in the United States and other countries.]
   * 
   * --------------
   * SubSystem.java
   * --------------
   * (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
   *
   * Original Author:  Thomas Morgner;
   * Contributor(s):   David Gilbert (for Object Refinery Limited);
   *
   * $Id: SubSystem.java,v 1.5 2005/10/18 13:14:50 mungady Exp $
   *
   * Changes
   * -------
   * 10-Jul-2003 : Initial version
   * 07-Jun-2004 : Added JCommon header (DG);
   * 
   */
  
  package org.jfree.base.modules;
  
  import org.jfree.util.Configuration;
  import org.jfree.util.ExtendedConfiguration;
  
  /**
   * A sub-system holds a separate collection of modules.
   * <p>
   * On a simple level, subsystems can be just libraries.
   * Libraries offering services need a controlled way to
   * initialize these services before dependent code starts
   * using the library. This can be achived by embedding the
   * library services into an own subsystem.
   *
   * @author Thomas Morgner
   */
  public interface SubSystem {
  
      /**
       * Returns the global configuration.
       * 
       * @return The global configuration.
       */
      public Configuration getGlobalConfig();
  
      /**
       * Returns the global configuration as ExtendedConfiguration instance.
       *
       * @return the extended configuration.
       */
      public ExtendedConfiguration getExtendedConfig ();
  
      /**
       * Returns the package manager.
       * 
       * @return The package manager.
       */
      public PackageManager getPackageManager();
  
  }
  