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+/* 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); }
+}