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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/javax/imageio/spi/IIORegistry.java | |
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Diffstat (limited to 'libjava/classpath/javax/imageio/spi/IIORegistry.java')
-rw-r--r-- | libjava/classpath/javax/imageio/spi/IIORegistry.java | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/libjava/classpath/javax/imageio/spi/IIORegistry.java b/libjava/classpath/javax/imageio/spi/IIORegistry.java new file mode 100644 index 000000000..faa571d60 --- /dev/null +++ b/libjava/classpath/javax/imageio/spi/IIORegistry.java @@ -0,0 +1,119 @@ +/* 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 java.awt.Toolkit; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Iterator; + +import gnu.java.awt.ClasspathToolkit; +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()); + } + } +} |