Re-tag 2.0-M4 RC1 release

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@831279 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 97 insertions, 0 deletions

diff --git a/tags/java/sca/2.0-M4-RC1/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/classloader/ClassLoaderDelegate.java b/tags/java/sca/2.0-M4-RC1/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/classloader/ClassLoaderDelegate.java
new file mode 100644
index 0000000000..b4b99ff9e5
--- /dev/null
+++ b/tags/java/sca/2.0-M4-RC1/modules/common-java/src/main/java/org/apache/tuscany/sca/common/java/classloader/ClassLoaderDelegate.java
@@ -0,0 +1,97 @@
+/*
+ * 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.common.java.classloader;
+
+import java.io.IOException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Enumeration;
+import java.util.List;
+
+import org.apache.tuscany.sca.common.java.collection.CompoundEnumeration;
+
+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, ClassLoader... loaders) {
+        super(parent);
+        if (loaders != null) {
+            for (ClassLoader cl : loaders) {
+                if (cl != null && cl != parent && !classLoaders.contains(cl)) {
+                    this.classLoaders.add(cl);
+                }
+            }
+        }
+    }
+
+    /**
+     * @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 parent : classLoaders) {
+            try {
+                return parent.loadClass(className);
+            } catch (ClassNotFoundException e) {
+                continue;
+            }
+        }
+        throw new ClassNotFoundException(className);
+    }
+
+    @Override
+    protected URL findResource(String resName) {
+        for (ClassLoader parent : classLoaders) {
+            URL url = parent.getResource(resName);
+            if (url != null) {
+                return url;
+            }
+        }
+        return null;
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    protected Enumeration<URL> findResources(String resName) throws IOException {
+        Enumeration<URL>[] enums = new Enumeration[classLoaders.size()];
+        int index = 0;
+        for (ClassLoader parent : classLoaders) {
+            enums[index++] = parent.getResources(resName);
+        }
+        return new CompoundEnumeration<URL>(enums);
+    }
+}