mirror of git://gcc.gnu.org/git/gcc.git
120 lines
4.1 KiB
Java
120 lines
4.1 KiB
Java
/* IIORegistry.java --
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.imageio.spi;
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import gnu.classpath.ServiceFactory;
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import java.awt.Toolkit;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Iterator;
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import gnu.java.awt.ClasspathToolkit;
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import gnu.javax.imageio.bmp.BMPImageReaderSpi;
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import gnu.javax.imageio.bmp.BMPImageWriterSpi;
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import gnu.javax.imageio.gif.GIFImageReaderSpi;
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import gnu.javax.imageio.png.PNGImageReaderSpi;
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public final class IIORegistry extends ServiceRegistry
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{
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private static final HashSet defaultCategories = new HashSet();
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private static HashMap instances = new HashMap();
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static
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{
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defaultCategories.add(ImageReaderSpi.class);
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defaultCategories.add(ImageWriterSpi.class);
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defaultCategories.add(ImageTranscoderSpi.class);
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defaultCategories.add(ImageInputStreamSpi.class);
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defaultCategories.add(ImageOutputStreamSpi.class);
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}
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public static synchronized IIORegistry getDefaultInstance()
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{
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// XXX: This leaks memory if a ThreadGroup isn't available anymore.
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ThreadGroup group = Thread.currentThread().getThreadGroup();
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IIORegistry registry = (IIORegistry) instances.get(group);
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if (registry == null)
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{
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registry = new IIORegistry();
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instances.put(group, registry);
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}
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return registry;
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}
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private IIORegistry()
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{
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super(defaultCategories.iterator());
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// XXX: Register built-in Spis here.
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registerServiceProvider(new PNGImageReaderSpi()); // Register PNG decoder.
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registerServiceProvider(new GIFImageReaderSpi()); // Register GIF decoder.
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registerServiceProvider(new BMPImageReaderSpi());
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registerServiceProvider(new BMPImageWriterSpi());
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Toolkit toolkit = Toolkit.getDefaultToolkit();
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if (toolkit instanceof ClasspathToolkit)
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((ClasspathToolkit)toolkit).registerImageIOSpis(this);
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registerApplicationClasspathSpis();
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}
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/**
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* Registers all available service providers found on the application
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* classpath.
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*/
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public void registerApplicationClasspathSpis()
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{
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ClassLoader loader = Thread.currentThread().getContextClassLoader();
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Iterator categories = getCategories();
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while (categories.hasNext())
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{
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Class category = (Class) categories.next();
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Iterator providers = ServiceFactory.lookupProviders(category, loader);
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while (providers.hasNext())
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registerServiceProvider((IIOServiceProvider) providers.next());
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}
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}
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}
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