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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/gnu/java/rmi/server/CombinedClassLoader.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/rmi/server/CombinedClassLoader.java')
-rw-r--r-- | libjava/classpath/gnu/java/rmi/server/CombinedClassLoader.java | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/rmi/server/CombinedClassLoader.java b/libjava/classpath/gnu/java/rmi/server/CombinedClassLoader.java new file mode 100644 index 000000000..3d01d0987 --- /dev/null +++ b/libjava/classpath/gnu/java/rmi/server/CombinedClassLoader.java @@ -0,0 +1,135 @@ +/* CombinedClassLoader.java -- Multiple class loader support for proxy. + Copyright (C) 2006 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 gnu.java.rmi.server; + +import java.io.IOException; +import java.net.URL; +import java.util.Collection; +import java.util.Enumeration; +import java.util.Iterator; +import java.util.ArrayList; + +/** + * This class supports the multiple class loaders to load the resources. It is + * used for constructing proxy classes that implement interfaces, loaded by + * the several different class loaders. + * + * @author Audrius Meskauskas (AudriusA@Bioinformatics.org) + */ +public class CombinedClassLoader extends ClassLoader +{ + /** + * The class loader array. + */ + ClassLoader[] loaders; + + /** + * Create a new combined class loader that uses the given collection of + * loaders to load the classes and resources. The loader order is equal to + * the order, returned by the collection interator. The duplicate loaders + * are discarded and the system class loader is added as the last loader. + * + * @param a_loaders the loadery collection (may contain duplicate instances + * that will be discarded. + */ + public CombinedClassLoader(Collection a_loaders) + { + ArrayList sLoaders = new ArrayList(a_loaders.size()); + + Iterator iter = a_loaders.iterator(); + Object cl; + while (iter.hasNext()) + { + cl = iter.next(); + if (cl!=null && !sLoaders.contains(cl)) + sLoaders.add(cl); + } + + loaders = new ClassLoader[sLoaders.size()]; + + for (int i = 0; i < loaders.length; i++) + loaders[i] = (ClassLoader) sLoaders.get(i); + } + + /** + * Find the class with the given name. + */ + protected Class findClass(String name) throws ClassNotFoundException + { + for (int i = 0; i < loaders.length; i++) + { + try + { + return loaders[i].loadClass(name); + } + catch (ClassNotFoundException e) + { + // try another. + } + } + return super.findClass(name); + } + + /** + * Find resource with the given name. + */ + protected URL findResource(String name) + { + for (int i = 0; i < loaders.length; i++) + { + URL resource = loaders[i].getResource(name); + if (resource != null) + return resource; + } + return super.findResource(name); + } + + /** + * Find resources with the given name. + */ + protected Enumeration findResources(String name) throws IOException + { + for (int i = 0; i < loaders.length; i++) + { + Enumeration resource = loaders[i].getResources(name); + if (resource != null) + return resource; + } + return super.findResources(name); } +} |