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.
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013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
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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
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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 }