1 files changed, 73 insertions, 0 deletions
diff --git a/branches/sca-java-integration/sca/kernel/spi/src/main/java/org/apache/tuscany/spi/databinding/extension/TransformerExtension.java b/branches/sca-java-integration/sca/kernel/spi/src/main/java/org/apache/tuscany/spi/databinding/extension/TransformerExtension.java
new file mode 100644
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+++ b/branches/sca-java-integration/sca/kernel/spi/src/main/java/org/apache/tuscany/spi/databinding/extension/TransformerExtension.java
@@ -0,0 +1,73 @@
+/*
+ * 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.spi.databinding.extension;
+
+import org.osoa.sca.annotations.EagerInit;
+import org.osoa.sca.annotations.Init;
+import org.osoa.sca.annotations.Scope;
+import org.osoa.sca.annotations.Service;
+
+import org.apache.tuscany.spi.annotation.Autowire;
+import org.apache.tuscany.spi.databinding.Transformer;
+import org.apache.tuscany.spi.databinding.TransformerRegistry;
+
+/**
+ * Base Implementation of Transformer which provides the registration to the transformer registry
+ *
+ * @version $Rev$ $Date$
+ */
+@Service(Transformer.class)
+@Scope("COMPOSITE")
+@EagerInit
+public abstract class TransformerExtension<S, T> implements Transformer {
+
+    protected TransformerRegistry registry;
+
+    protected TransformerExtension() {
+        super();
+    }
+
+    @Autowire
+    public void setTransformerRegistry(TransformerRegistry registry) {
+        this.registry = registry;
+    }
+
+    @Init
+    public void init() {
+        registry.registerTransformer(this);
+    }
+
+    protected abstract Class getSourceType();
+
+    protected abstract Class getTargetType();
+
+    public String getSourceDataBinding() {
+        return getSourceType().getName();
+    }
+
+    public String getTargetDataBinding() {
+        return getTargetType().getName();
+    }
+
+    public int getWeight() {
+        // default to 50
+        return 50;
+    }
+
+}