1 files changed, 127 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/binding-jms-runtime/src/main/java/org/apache/tuscany/sca/binding/jms/provider/JMSMessageProcessorUtil.java b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-jms-runtime/src/main/java/org/apache/tuscany/sca/binding/jms/provider/JMSMessageProcessorUtil.java
new file mode 100644
index 0000000000..e96f273d4a
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-jms-runtime/src/main/java/org/apache/tuscany/sca/binding/jms/provider/JMSMessageProcessorUtil.java
@@ -0,0 +1,127 @@
+/*
+ * 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.binding.jms.provider;
+
+import java.lang.reflect.Constructor;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.security.PrivilegedExceptionAction;
+import java.security.PrivilegedActionException;
+
+import org.apache.tuscany.sca.binding.jms.JMSBinding;
+import org.apache.tuscany.sca.binding.jms.JMSBindingException;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+
+/**
+ * Utility methods to load JMS message processors.
+ * 
+ * @version $Rev$ $Date$
+ */
+public class JMSMessageProcessorUtil {
+
+    /**
+     * Used to create instances of the JMSResourceFactory and RequestMessageProcessor and ResponseMessageProcessor from 
+     * string based class name provided in the configuration
+     * 
+     * @param cl ClassLoader
+     * @param className the string based class name to load and instantiate
+     * @return the new object
+     */
+    private static Object instantiate(ClassLoader cl, final String className, final JMSBinding binding) {
+        Object instance;
+        if (cl == null) {
+            cl = cl = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
+                public ClassLoader run() {
+                    return binding.getClass().getClassLoader();
+                }
+            });	
+        }
+
+        try {
+            Class<?> clazz;
+
+            try {
+                clazz = cl.loadClass(className);
+            } catch (ClassNotFoundException e) {
+                try{
+                    clazz = AccessController.doPrivileged(new PrivilegedExceptionAction<Class>() {
+                        public Class run() throws ClassNotFoundException{
+                            return binding.getClass().getClassLoader().loadClass(className);
+                        }
+                    });	
+                } catch (PrivilegedActionException ex) {
+				   throw (ClassNotFoundException) ex.getException(); 
+                }		
+				
+            }
+
+            Constructor<?> constructor = clazz.getDeclaredConstructor(new Class[] {JMSBinding.class});
+            instance = constructor.newInstance(binding);
+
+        } catch (Throwable e) {
+            throw new JMSBindingException("Exception instantiating OperationAndDataBinding class", e);
+        }
+
+        return instance;
+    }
+
+//    public static JMSMessageProcessor getRequestMessageProcessor(JMSBinding binding) {
+//        return (JMSMessageProcessor)instantiate(null, binding.getRequestMessageProcessorName(), binding);
+//    }
+//
+//    public static JMSMessageProcessor getResponseMessageProcessor(JMSBinding binding) {
+//        return (JMSMessageProcessor)instantiate(null, binding.getResponseMessageProcessorName(), binding);
+//    }
+//
+    private static Object instantiate(ClassLoader cl, String className, JMSBinding binding, ExtensionPointRegistry registry) {
+        try {
+            for (ServiceDeclaration sd : registry.getServiceDiscovery().getServiceDeclarations(JMSMessageProcessor.class)) {
+                if (className.equals(sd.getClassName())) {
+                    final Class<?> clazz = sd.loadClass();
+                    Constructor<?> constructor;
+                    try {
+                        constructor = AccessController.doPrivileged(new PrivilegedExceptionAction<Constructor<?>>() {
+                            public Constructor<?> run() throws NoSuchMethodException{
+                                return clazz.getDeclaredConstructor(new Class[] {JMSBinding.class, ExtensionPointRegistry.class});
+                            }
+                        });	
+                    } catch (PrivilegedActionException ex) {
+                        throw (NoSuchMethodException) ex.getException();
+                    }
+                    return constructor.newInstance(binding, registry);
+                }
+                
+            }
+            throw new JMSBindingException("Class not found: " + className);
+        } catch (Throwable e) {
+            throw new JMSBindingException("Exception instantiating OperationAndDataBinding class", e);
+        }
+    }
+
+    public static JMSMessageProcessor getRequestMessageProcessor(ExtensionPointRegistry registry, JMSBinding binding) {
+        return (JMSMessageProcessor)instantiate(null, binding.getRequestMessageProcessorName(), binding, registry);
+    }
+
+    public static JMSMessageProcessor getResponseMessageProcessor(ExtensionPointRegistry registry, JMSBinding binding) {
+        return (JMSMessageProcessor)instantiate(null, binding.getResponseMessageProcessorName(), binding, registry);
+    }
+    
+}