2006-03-02 Andrew John Hughes <gnu_andrew@member.fsf.org>

	* Merge of HEAD-->generics-branch for the period between
	the 0.20 release and the tag generics-merge-20050225.

1 files changed, 149 insertions, 0 deletions

diff --git a/gnu/java/rmi/server/CombinedClassLoader.java b/gnu/java/rmi/server/CombinedClassLoader.java
new file mode 100644
index 000000000..3d2e37d53
--- /dev/null
+++ b/gnu/java/rmi/server/CombinedClassLoader.java
@@ -0,0 +1,149 @@
+/* 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 (!sLoaders.contains(cl))
+          sLoaders.add(iter.next());
+      }
+    
+    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 findClass(name);
+          }
+        catch (ClassNotFoundException e)
+          {
+            // try another.
+          }
+      }
+    return super.findClass(name);
+  }
+
+  /**
+   * Find the library with the given name
+   */
+  protected String findLibrary(String name)
+  {
+    for (int i = 0; i < loaders.length; i++)
+      {
+        String lib = findLibrary(name);
+        if (lib != null)
+          return lib;
+      }
+    return super.findLibrary(name);
+  }
+
+  /**
+   * Find resource with the given name.
+   */
+  protected URL findResource(String name)
+  {
+    for (int i = 0; i < loaders.length; i++)
+      {
+        URL resource = findResource(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 = findResources(name);
+        if (resource != null)
+          return resource;
+      }
+    return super.findResources(name);  }
+}