1 files changed, 173 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java b/sca-java-2.x/tags/2.0.1-RC1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java
new file mode 100644
index 0000000000..8b15d616ac
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/core-databinding/src/main/java/org/apache/tuscany/sca/core/databinding/wire/DataTransformationInterceptor.java
@@ -0,0 +1,173 @@
+/*
+ * 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.core.databinding.wire;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.tuscany.sca.core.invocation.InterceptorAsyncImpl;
+import org.apache.tuscany.sca.databinding.Mediator;
+import org.apache.tuscany.sca.interfacedef.DataType;
+import org.apache.tuscany.sca.interfacedef.Operation;
+import org.apache.tuscany.sca.interfacedef.java.JavaOperation;
+import org.apache.tuscany.sca.invocation.Message;
+import org.apache.tuscany.sca.runtime.Invocable;
+
+/**
+ * An interceptor to transform data across databindings on the wire
+ * 
+ * @version $Rev$ $Date$
+ */
+public class DataTransformationInterceptor extends InterceptorAsyncImpl {
+
+    private Operation sourceOperation;
+
+    private Operation targetOperation;
+    private Invocable invocable;
+    private Mediator mediator;
+
+    public DataTransformationInterceptor(Invocable invocable,
+                                         Operation sourceOperation,
+                                         Operation targetOperation,
+                                         Mediator mediator) {
+        super();
+        this.sourceOperation = sourceOperation;
+        this.targetOperation = targetOperation;
+        if ( sourceOperation instanceof JavaOperation ) {
+        	JavaOperation javaOp = (JavaOperation) sourceOperation;
+        	Method sourceMethod = javaOp.getJavaMethod();
+        }
+        
+        this.mediator = mediator;
+        this.invocable = invocable;
+    }
+    
+    public Message processRequest(Message msg) {
+        Map<String, Object> metadata = new HashMap<String, Object>();
+        metadata.put(Invocable.class.getName(), invocable);
+        Object input = mediator.mediateInput(msg.getBody(), sourceOperation, targetOperation, metadata);
+        msg.setBody(input);
+        return msg;
+    }
+
+    public Message processResponse(Message msg) {
+        Message resultMsg = msg;
+        Map<String, Object> metadata = new HashMap<String, Object>();
+        metadata.put(Invocable.class.getName(), invocable);
+        
+        if (sourceOperation.isNonBlocking()) {
+            // Not to reset the message body
+            return resultMsg;
+        }
+
+        Object result = resultMsg.getBody();
+        
+        if (resultMsg.isFault()) {
+            Object transformedFault = null;
+            if ((result instanceof Exception) && !(result instanceof RuntimeException)) {
+                transformedFault = mediator.mediateFault(result, sourceOperation, targetOperation, metadata);
+                if (transformedFault != result) {
+                    resultMsg.setFaultBody(transformedFault);
+                }
+            }
+            //
+            // Leave it to another layer to actually throw the Exception which constitutes
+            // the message body.  We don't throw it here.
+            //
+        } else {
+            assert !(result instanceof Throwable) : "Expected messages that are not throwable " + result;
+            Object newResult = mediator.mediateOutput(result, sourceOperation, targetOperation, metadata);
+            resultMsg.setBody(newResult);
+        }
+
+        return resultMsg;
+    }
+    
+/*    
+    public Message invoke(Message msg) {
+        Map<String, Object> metadata = new HashMap<String, Object>();
+        metadata.put(Invocable.class.getName(), invocable);
+        Object input = mediator.mediateInput(msg.getBody(), sourceOperation, targetOperation, metadata);
+        msg.setBody(input);
+        Message resultMsg = next.invoke(msg);
+       
+        if (sourceOperation.isNonBlocking()) {
+            // Not to reset the message body
+            return resultMsg;
+        }
+
+        Object result = resultMsg.getBody();
+        
+        if (resultMsg.isFault()) {
+            Object transformedFault = null;
+            if ((result instanceof Exception) && !(result instanceof RuntimeException)) {
+                transformedFault = mediator.mediateFault(result, sourceOperation, targetOperation, metadata);
+                if (transformedFault != result) {
+                    resultMsg.setFaultBody(transformedFault);
+                }
+            }
+            //
+            // Leave it to another layer to actually throw the Exception which constitutes
+            // the message body.  We don't throw it here.
+            //
+        } else {
+            assert !(result instanceof Throwable) : "Expected messages that are not throwable " + result;
+            Object newResult = mediator.mediateOutput(result, sourceOperation, targetOperation, metadata);
+            resultMsg.setBody(newResult);
+        }
+
+        return resultMsg;
+    }
+*/    
+
+
+    /**
+     * Returns return type for first Holder in input list.
+     * Returns null if the inputs do not contain a Holder.
+     */
+    protected  List<DataType<DataType>> getHolderTypes( DataType<List<DataType>> inputTypes ) {
+    	ArrayList<DataType<DataType>> returnTypes = new ArrayList<DataType<DataType>>();
+    	if (inputTypes != null) {
+    		
+    		List<DataType> logicalType = inputTypes.getLogical();
+    		if (logicalType != null) {
+    			for (int i = 0; i < logicalType.size(); i++) {
+    				DataType dataType = logicalType.get(i);
+    				if (isHolder(dataType.getGenericType())) {
+    					returnTypes.add(dataType);
+    				}
+    			}
+    		}
+    	}
+    	return returnTypes;
+    }
+    
+    protected static boolean isHolder( Type type ) {
+    	String typeString = type.toString();
+    	if ( typeString.startsWith( "javax.xml.ws.Holder" ) ) {
+    		return true;
+    	}
+    	return false;        
+    }
+}