001    /* RegisterableService.java -- An interface for service providers.
002       Copyright (C) 2004, 2005  Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    
039    package javax.imageio.spi;
040    
041    
042    /**
043     * An interface which service providers may optionally implement in
044     * order to get notified when they are added or removed from a {@link
045     * ServiceRegistry}.
046     *
047     * @since 1.4
048     *
049     * @author Sascha Brawer (brawer@dandelis.ch)
050     */
051    public interface RegisterableService
052    {
053      /**
054       * Informs this service provider that it has been registered in a
055       * {@link ServiceRegistry}. If this provider gets registered as an
056       * implementor for several service categories, its
057       * <code>onRegistration</code> method will be called multiple times.
058       *
059       * @param registry the registry to which this service provider has
060       * been added.
061       *
062       * @param category the service category for which this provider has
063       * been registered as an implementor.
064       */
065      void onRegistration(ServiceRegistry registry, Class<?> category);
066    
067    
068      /**
069       * Informs this service provider that it has been de-registered from
070       * a {@link ServiceRegistry}. If this provider had been registered
071       * as an implementor for several service categories, its
072       * <code>onDeregistration</code> method will be called multiple
073       * times.
074       *
075       * @param registry the registry from which this service provider has
076       * been removed.
077       *
078       * @param category the service category for which this provider has
079       * been registered as an implementor.
080       */
081      void onDeregistration(ServiceRegistry registry, Class<?> category);
082    }