1 files changed, 98 insertions, 0 deletions
diff --git a/sca-java-2.x/branches/2.0/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/util/OperationDataBindingHelper.java b/sca-java-2.x/branches/2.0/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/util/OperationDataBindingHelper.java
new file mode 100644
index 0000000000..8ecd0ffb7f
--- /dev/null
+++ b/sca-java-2.x/branches/2.0/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/util/OperationDataBindingHelper.java
@@ -0,0 +1,98 @@
+/*
+ * 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.databinding.util;
+
+import java.util.List;
+
+import org.apache.tuscany.sca.interfacedef.DataType;
+import org.apache.tuscany.sca.interfacedef.Operation;
+
+/**
+*
+* @version $Rev$ $Date$
+*/
+public class OperationDataBindingHelper {
+    
+    private static boolean isTransformationRequired(DataType source, DataType target) {
+        if (source == null || target == null) { // void return type
+            return false;
+        }
+        if (source == target) {
+            return false;
+        }
+
+        String sourceDataBinding = source.getDataBinding();
+        String targetDataBinding = target.getDataBinding();
+        if (sourceDataBinding == targetDataBinding) {
+            return false;
+        }
+        if (sourceDataBinding == null || targetDataBinding == null) {
+            // TODO: If any of the databinding is null, then no transformation
+            return false;
+        }
+        return !sourceDataBinding.equals(targetDataBinding);
+    }
+
+    public static boolean isTransformationRequired(Operation source, Operation target) {
+        if (source == target) {
+            return false;
+        }
+
+        if (source.isInputWrapperStyle() != target.isInputWrapperStyle()) {
+            return true;
+        }
+
+        if (source.isOutputWrapperStyle() != target.isOutputWrapperStyle()) {
+            return true;
+        }
+        
+        // Check output type
+        List<DataType> sourceOutputType = source.getOutputType().getLogical();
+        List<DataType> targetOutputType = target.getOutputType().getLogical();
+
+        int outputSize = sourceOutputType.size();
+        if ( outputSize != targetOutputType.size() ) {
+                return true;
+        }
+        
+        for (int i = 0; i < outputSize; i++) {
+            if (isTransformationRequired(sourceOutputType.get(i), targetOutputType.get(i))) {
+                return true;
+            }
+        }       
+
+        List<DataType> sourceInputType = source.getInputType().getLogical();
+        List<DataType> targetInputType = target.getInputType().getLogical();
+
+        int size = sourceInputType.size();
+        if (size != targetInputType.size()) {
+            // TUSCANY-1682: The wrapper style may have different arguments
+            return true;
+        }
+        for (int i = 0; i < size; i++) {
+            if (isTransformationRequired(sourceInputType.get(i), targetInputType.get(i))) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}
+