libjava/javax/imageio/spi/RegisterableService.java

   1 /* RegisterableService.java -- An interface for service providers.
   2    Copyright (C) 2004, 2005  Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package javax.imageio.spi;
  40
  41
  42 /**
  43  * An interface which service providers may optionally implement in
  44  * order to get notified when they are added or removed from a {@link
  45  * ServiceRegistry}.
  46  *
  47  * @since 1.4
  48  *
  49  * @author Sascha Brawer (brawer@dandelis.ch)
  50  */
  51 public interface RegisterableService
  52 {
  53   /**
  54    * Informs this service provider that it has been registered in a
  55    * {@link ServiceRegistry}. If this provider gets registered as an
  56    * implementor for several service categories, its
  57    * <code>onRegistration</code> method will be called multiple times.
  58    *
  59    * @param registry the registry to which this service provider has
  60    * been added.
  61    *
  62    * @param category the service category for which this provider has
  63    * been registered as an implementor.
  64    */
  65   void onRegistration(ServiceRegistry registry, Class category);
  66
  67
  68   /**
  69    * Informs this service provider that it has been de-registered from
  70    * a {@link ServiceRegistry}. If this provider had been registered
  71    * as an implementor for several service categories, its
  72    * <code>onDeregistration</code> method will be called multiple
  73    * times.
  74    *
  75    * @param registry the registry from which this service provider has
  76    * been removed.
  77    *
  78    * @param category the service category for which this provider has
  79    * been registered as an implementor.
  80    */
  81   void onDeregistration(ServiceRegistry registry, Class category);
  82 }
  83