GNU Classpath (0.20) | |
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1: /* IIORegistry.java -- 2: Copyright (C) 2004 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., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 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: import gnu.classpath.ServiceFactory; 42: import gnu.java.awt.ClasspathToolkit; 43: 44: import java.awt.Toolkit; 45: import java.util.HashMap; 46: import java.util.HashSet; 47: import java.util.Iterator; 48: 49: public final class IIORegistry extends ServiceRegistry 50: { 51: private static final HashSet defaultCategories = new HashSet(); 52: 53: private static HashMap instances = new HashMap(); 54: 55: static 56: { 57: defaultCategories.add(ImageReaderSpi.class); 58: defaultCategories.add(ImageWriterSpi.class); 59: defaultCategories.add(ImageTranscoderSpi.class); 60: defaultCategories.add(ImageInputStreamSpi.class); 61: defaultCategories.add(ImageOutputStreamSpi.class); 62: } 63: 64: public static synchronized IIORegistry getDefaultInstance() 65: { 66: // XXX: This leaks memory if a ThreadGroup isn't available anymore. 67: ThreadGroup group = Thread.currentThread().getThreadGroup(); 68: IIORegistry registry = (IIORegistry) instances.get(group); 69: 70: if (registry == null) 71: { 72: registry = new IIORegistry(); 73: instances.put(group, registry); 74: } 75: 76: return registry; 77: } 78: 79: private IIORegistry() 80: { 81: super(defaultCategories.iterator()); 82: 83: // XXX: Register built-in Spis here. 84: 85: Toolkit toolkit = Toolkit.getDefaultToolkit(); 86: if (toolkit instanceof ClasspathToolkit) 87: ((ClasspathToolkit)toolkit).registerImageIOSpis(this); 88: 89: registerApplicationClasspathSpis(); 90: } 91: 92: /** 93: * Registers all available service providers found on the application 94: * classpath. 95: */ 96: public void registerApplicationClasspathSpis() 97: { 98: ClassLoader loader = Thread.currentThread().getContextClassLoader(); 99: Iterator categories = getCategories(); 100: 101: while (categories.hasNext()) 102: { 103: Class category = (Class) categories.next(); 104: Iterator providers = ServiceFactory.lookupProviders(category, loader); 105: 106: while (providers.hasNext()) 107: registerServiceProvider((IIOServiceProvider) providers.next()); 108: } 109: } 110: }
GNU Classpath (0.20) |