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diff --git a/branches/sca-java-0.91/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/DefaultTransformerExtensionPoint.java b/branches/sca-java-0.91/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/DefaultTransformerExtensionPoint.java
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+++ b/branches/sca-java-0.91/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/DefaultTransformerExtensionPoint.java
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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.databinding;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.tuscany.sca.databinding.impl.DirectedGraph;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public class DefaultTransformerExtensionPoint implements TransformerExtensionPoint {
+    private DataBindingExtensionPoint dataBindings;
+    
+    private final DirectedGraph<Object, Transformer> graph = new DirectedGraph<Object, Transformer>();
+    
+    public DefaultTransformerExtensionPoint(DataBindingExtensionPoint dataBindings) {
+        this.dataBindings = dataBindings;
+    }
+
+    public void addTransformer(String sourceType, String resultType, int weight, Transformer transformer) {
+        graph.addEdge(sourceType, resultType, transformer, weight);
+    }
+
+    public void addTransformer(Transformer transformer) {
+        graph.addEdge(transformer.getSourceDataBinding(),
+            transformer.getTargetDataBinding(),
+            transformer,
+            transformer.getWeight());
+    }
+
+    public boolean removeTransformer(String sourceType, String resultType) {
+        return graph.removeEdge(sourceType, resultType);
+    }
+
+    public Transformer getTransformer(String sourceType, String resultType) {
+        DirectedGraph<Object, Transformer>.Edge edge = graph.getEdge(sourceType, resultType);
+        return (edge == null) ? null : edge.getValue();
+    }
+
+    public List<Transformer> getTransformerChain(String sourceType, String resultType) {
+        String source = normalize(sourceType);
+        String result = normalize(resultType);
+        List<Transformer> transformers = new ArrayList<Transformer>();
+        DirectedGraph<Object, Transformer>.Path path = graph.getShortestPath(source, result);
+        if (path == null) {
+            return null;
+        }
+        for (DirectedGraph<Object, Transformer>.Edge edge : path.getEdges()) {
+            transformers.add(edge.getValue());
+        }
+        return transformers;
+    }
+
+    public String toString() {
+        return graph.toString();
+    }
+
+    /**
+     * Normalize the id to a name of a data binding as databindings may have aliases
+     * @param id
+     * @return
+     */
+    private String normalize(String id) {
+        if (dataBindings != null) {
+            DataBinding dataBinding = dataBindings.getDataBinding(id);
+            return dataBinding == null ? id : dataBinding.getName();
+        } else {
+            return id;
+        }
+    }
+
+}