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+/*
+ * 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.sca.axis2.impl;
+
+import java.util.logging.Logger;
+
+import org.apache.tuscany.sca.invocation.Interceptor;
+import org.apache.tuscany.sca.invocation.Invoker;
+import org.apache.tuscany.sca.invocation.Message;
+import org.apache.tuscany.sca.runtime.EndpointReference;
+import org.osoa.sca.ServiceUnavailableException;
+
+
+/**
+ * A wrapper for the Axis2BindingInvoker that ensures that the URL of the target
+ * service is correct by looking it up in the service registry if it is not provided
+ * 
+ * @version $Rev: 563772 $ $Date: 2007-08-08 07:50:49 +0100 (Wed, 08 Aug 2007) $
+ */
+public class Axis2SCABindingInvoker implements Interceptor {
+    
+    private static final Logger logger = Logger.getLogger(Axis2SCABindingInvoker.class.getName());    
+    
+    private Invoker axis2Invoker;
+    private Axis2SCAReferenceBindingProvider provider;
+
+    public Axis2SCABindingInvoker(Axis2SCAReferenceBindingProvider provider, Invoker axis2Invoker) {
+        this.axis2Invoker = axis2Invoker;
+        this.provider = provider;
+    }
+
+    public void setNext(Invoker next) {
+    }
+
+    public Invoker getNext() {
+        return null;
+    }
+
+    /**
+     * Fix up the URL for the message. The "to" EndPoint comes from the wire
+     * target and needs to be replaced with the endpoint from the registry. 
+     * The default URL for an Endpoint URI where there is no 
+     * target component or service information, as in the case of a 
+     * wire crossing a node boundary, is "/"
+     */
+    public Message invoke(Message msg) {
+
+        // make sure that the epr of the target service is set in the TO
+        // field of the message
+        EndpointReference to = msg.getTo();
+
+        // check to see if we either don't have an endpoint set or if the URI 
+        // is dynamic or the target service is marked as unresolved
+        if ((to == null) || (to.getURI().equals("/") || (to.getContract() == null) || (to.getContract().isUnresolved()))) {
+
+            EndpointReference eprTo = provider.getServiceEndpoint();
+
+            if ( (eprTo == null) || (eprTo.getURI() == null)) {
+                throw new ServiceUnavailableException("Endpoint for service: " + provider.getSCABinding().getURI()
+                    + " can't be found for component: "
+                    + provider.getComponent().getName()
+                    + " reference: "
+                    + provider.getComponentReference().getName());
+            }
+            msg.setTo(eprTo);
+        }
+
+        // make sure that the epr of the callback service (if there is one) is set
+        // in the callbackReference field of the message. 
+        EndpointReference callbackEPR = msg.getFrom().getReferenceParameters().getCallbackReference();
+
+        if ((callbackEPR == null) || (callbackEPR.getURI().equals("/"))) {
+
+            callbackEPR = provider.getCallbackEndpoint();
+
+            if (callbackEPR != null) {
+                msg.getFrom().getReferenceParameters().setCallbackReference(callbackEPR);
+            }
+        }
+
+        // do the axis2 stuff
+        return axis2Invoker.invoke(msg);
+    }
+}