From 132aa8a77685ec92bc90c03f987650d275a7b639 Mon Sep 17 00:00:00 2001
From: lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68>
Date: Mon, 30 Sep 2013 06:59:11 +0000
Subject: 2.0.1 RC1 release tag

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1527464 13f79535-47bb-0310-9956-ffa450edef68
---
 .../extensibility/impl/ClassLoaderDelegate.java    | 89 ++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 sca-java-2.x/tags/2.0.1-RC1/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/impl/ClassLoaderDelegate.java

(limited to 'sca-java-2.x/tags/2.0.1-RC1/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/impl/ClassLoaderDelegate.java')

diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/impl/ClassLoaderDelegate.java b/sca-java-2.x/tags/2.0.1-RC1/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/impl/ClassLoaderDelegate.java
new file mode 100644
index 0000000000..d052d6b10f
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/extensibility/src/main/java/org/apache/tuscany/sca/extensibility/impl/ClassLoaderDelegate.java
@@ -0,0 +1,89 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.extensibility.impl;
+
+import java.io.IOException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * A classloader that can delegate to a list of other classloaders
+ */
+public class ClassLoaderDelegate extends ClassLoader {
+    private final List<ClassLoader> classLoaders = new ArrayList<ClassLoader>();
+
+    /**
+     * @param parent The parent classloaders
+     * @param loaders A list of classloaders to be used to load classes or resources
+     */
+    public ClassLoaderDelegate(ClassLoader parent, Collection<ClassLoader> loaders) {
+        super(parent);
+        if (loaders != null) {
+            for (ClassLoader cl : loaders) {
+                if (cl != null && cl != parent && !classLoaders.contains(cl)) {
+                    this.classLoaders.add(cl);
+                }
+            }
+        }
+    }
+
+    @Override
+    protected Class<?> findClass(String className) throws ClassNotFoundException {
+        for (ClassLoader delegate : classLoaders) {
+            try {
+                return delegate.loadClass(className);
+            } catch (ClassNotFoundException e) {
+                continue;
+            }
+        }
+        throw new ClassNotFoundException(className);
+    }
+
+    @Override
+    protected URL findResource(String resName) {
+        for (ClassLoader delegate : classLoaders) {
+            URL url = delegate.getResource(resName);
+            if (url != null) {
+                return url;
+            }
+        }
+        return null;
+    }
+
+    @Override
+    protected Enumeration<URL> findResources(String resName) throws IOException {
+        Set<URL> urlSet = new HashSet<URL>();
+        for (ClassLoader delegate : classLoaders) {
+            Enumeration<URL> urls = delegate.getResources(resName);
+            if (urls != null) {
+                while (urls.hasMoreElements()) {
+                    urlSet.add(urls.nextElement());
+                }
+            }
+        }
+        return Collections.enumeration(urlSet);
+    }
+}
-- 
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