| /* IIORegistry.java -- |
| Copyright (C) 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package javax.imageio.spi; |
| |
| import gnu.classpath.ServiceFactory; |
| import gnu.java.awt.ClasspathToolkit; |
| |
| import java.awt.Toolkit; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| |
| import gnu.javax.imageio.bmp.BMPImageReaderSpi; |
| import gnu.javax.imageio.bmp.BMPImageWriterSpi; |
| import gnu.javax.imageio.gif.GIFImageReaderSpi; |
| import gnu.javax.imageio.png.PNGImageReaderSpi; |
| |
| public final class IIORegistry extends ServiceRegistry |
| { |
| private static final HashSet defaultCategories = new HashSet(); |
| |
| private static HashMap instances = new HashMap(); |
| |
| static |
| { |
| defaultCategories.add(ImageReaderSpi.class); |
| defaultCategories.add(ImageWriterSpi.class); |
| defaultCategories.add(ImageTranscoderSpi.class); |
| defaultCategories.add(ImageInputStreamSpi.class); |
| defaultCategories.add(ImageOutputStreamSpi.class); |
| } |
| |
| public static synchronized IIORegistry getDefaultInstance() |
| { |
| // XXX: This leaks memory if a ThreadGroup isn't available anymore. |
| ThreadGroup group = Thread.currentThread().getThreadGroup(); |
| IIORegistry registry = (IIORegistry) instances.get(group); |
| |
| if (registry == null) |
| { |
| registry = new IIORegistry(); |
| instances.put(group, registry); |
| } |
| |
| return registry; |
| } |
| |
| private IIORegistry() |
| { |
| super(defaultCategories.iterator()); |
| |
| // XXX: Register built-in Spis here. |
| registerServiceProvider(new PNGImageReaderSpi()); // Register PNG decoder. |
| registerServiceProvider(new GIFImageReaderSpi()); // Register GIF decoder. |
| registerServiceProvider(new BMPImageReaderSpi()); |
| registerServiceProvider(new BMPImageWriterSpi()); |
| |
| Toolkit toolkit = Toolkit.getDefaultToolkit(); |
| if (toolkit instanceof ClasspathToolkit) |
| ((ClasspathToolkit)toolkit).registerImageIOSpis(this); |
| |
| registerApplicationClasspathSpis(); |
| } |
| |
| /** |
| * Registers all available service providers found on the application |
| * classpath. |
| */ |
| public void registerApplicationClasspathSpis() |
| { |
| ClassLoader loader = Thread.currentThread().getContextClassLoader(); |
| Iterator categories = getCategories(); |
| |
| while (categories.hasNext()) |
| { |
| Class category = (Class) categories.next(); |
| Iterator providers = ServiceFactory.lookupProviders(category, loader); |
| |
| while (providers.hasNext()) |
| registerServiceProvider((IIOServiceProvider) providers.next()); |
| } |
| } |
| } |