1 files changed, 0 insertions, 288 deletions
diff --git a/branches/sca-java-1.0.1/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/DefaultTransformerExtensionPoint.java b/branches/sca-java-1.0.1/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/DefaultTransformerExtensionPoint.java
deleted file mode 100755
index 1afe3fa80f..0000000000
--- a/branches/sca-java-1.0.1/modules/databinding/src/main/java/org/apache/tuscany/sca/databinding/DefaultTransformerExtensionPoint.java
+++ /dev/null
@@ -1,288 +0,0 @@
-/*
- * 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.io.IOException;
-import java.lang.ref.WeakReference;
-import java.lang.reflect.Constructor;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import org.apache.tuscany.sca.databinding.impl.DirectedGraph;
-import org.apache.tuscany.sca.databinding.impl.ServiceConfigurationUtil;
-
-/**
- * @version $Rev$ $Date$
- */
-public class DefaultTransformerExtensionPoint implements TransformerExtensionPoint {
-	private static final Logger logger = Logger.getLogger(DefaultTransformerExtensionPoint.class.getName());
-    private boolean loadedTransformers;
-    
-    private final DirectedGraph<Object, Transformer> graph = new DirectedGraph<Object, Transformer>();
-    
-    public DefaultTransformerExtensionPoint() {
-    }
-    
-    public void addTransformer(String sourceType, String resultType, int weight, Transformer transformer) {
-    	if (logger.isLoggable(Level.FINE)) {
-			String className = transformer.getClass().getName();
-			boolean lazy = false;
-			boolean pull = (transformer instanceof PullTransformer);
-			if (transformer instanceof LazyPullTransformer) {
-				className = ((LazyPullTransformer) transformer).className;
-				lazy = true;
-			}
-			if (transformer instanceof LazyPushTransformer) {
-				className = ((LazyPushTransformer) transformer).className;
-				lazy = true;
-			}
-
-			logger.fine("Adding transformer: " + className + ";source="
-					+ sourceType + ",target=" + resultType + ",weight="
-					+ weight + ",type=" + (pull ? "pull" : "push") + ",lazy="
-					+ lazy);
-		}
-        graph.addEdge(sourceType, resultType, transformer, weight);
-    }
-
-    public void addTransformer(Transformer transformer) {
-        addTransformer(transformer.getSourceDataBinding(),
-            transformer.getTargetDataBinding(),
-            transformer.getWeight(),
-            transformer);
-    }
-
-    public boolean removeTransformer(String sourceType, String resultType) {
-        return graph.removeEdge(sourceType, resultType);
-    }
-
-    public Transformer getTransformer(String sourceType, String resultType) {
-        loadTransformers();
-        
-        DirectedGraph<Object, Transformer>.Edge edge = graph.getEdge(sourceType, resultType);
-        return (edge == null) ? null : edge.getValue();
-    }
-
-    /**
-     * Dynamically load transformers registered under META-INF/services.
-     *
-     */
-    private void loadTransformers() {
-        if (loadedTransformers) {
-            return;
-        }
-        loadTransformers(PullTransformer.class);
-        loadTransformers(PushTransformer.class);
-        loadedTransformers = true;
-    }
-
-    /**
-     * Dynamically load transformers registered under META-INF/services.
-     * 
-     * @param transformerClass
-     */
-    private void loadTransformers(Class<?> transformerClass) {
-
-        // Get the transformer service declarations
-        ClassLoader classLoader = transformerClass.getClassLoader();
-        List<String> transformerDeclarations; 
-        try {
-            transformerDeclarations = ServiceConfigurationUtil.getServiceClassNames(classLoader, transformerClass.getName());
-        } catch (IOException e) {
-            throw new IllegalStateException(e);
-        }
-        
-        // Load transformers
-        for (String transformerDeclaration: transformerDeclarations) {
-            Map<String, String> attributes = ServiceConfigurationUtil.parseServiceDeclaration(transformerDeclaration);
-            String className = attributes.get("class");
-            String source = attributes.get("source");
-            String target = attributes.get("target");
-            int weight = Integer.valueOf(attributes.get("weight"));
-                
-            // Create a transformer wrapper and register it
-            Transformer transformer;
-            if (transformerClass == PullTransformer.class) {
-                transformer = new LazyPullTransformer(source, target, weight, classLoader, className);
-            } else {
-                transformer = new LazyPushTransformer(source, target, weight, classLoader, className);
-            }
-            addTransformer(transformer);
-        }
-    }
-    
-    /**
-     * A transformer facade allowing transformers to be lazily loaded
-     * and initialized.
-     */
-    private static class LazyPullTransformer implements PullTransformer<Object, Object> {
-
-        private String source;
-        private String target;
-        private int weight;
-        private WeakReference<ClassLoader> classLoader;
-        private String className;
-        private PullTransformer<Object, Object> transformer;
-
-        public LazyPullTransformer(String source, String target, int weight, ClassLoader classLoader, String className) {
-            this.source = source;
-            this.target = target;
-            this.weight = weight;
-            this.classLoader = new WeakReference<ClassLoader>(classLoader);
-            this.className = className;
-        }
-
-        /**
-         * Load and instantiate the transformer class.
-         * 
-         * @return The transformer.
-         */
-        @SuppressWarnings("unchecked")
-        private PullTransformer<Object, Object> getTransformer() {
-            if (transformer == null) {
-                try {
-                    Class<PullTransformer<Object, Object>> transformerClass =
-                        (Class<PullTransformer<Object, Object>>)Class.forName(className, true, classLoader.get());
-                    Constructor<PullTransformer<Object, Object>> constructor = transformerClass.getConstructor();
-                    transformer = constructor.newInstance();
-                } catch (Exception e) {
-                    throw new IllegalStateException(e);
-                }
-            }
-            return transformer;
-        }
-
-        public String getSourceDataBinding() {
-            return source;
-        }
-
-        public String getTargetDataBinding() {
-            return target;
-        }
-
-        public int getWeight() {
-            return weight;
-        }
-        
-        public Object transform(Object source, TransformationContext context) {
-            return getTransformer().transform(source, context);
-        }
-
-        public String toString() {
-            StringBuffer sb = new StringBuffer(super.toString());
-            sb.append(";className=").append(className);
-            return sb.toString();
-        }
-    }
-
-    /**
-     * A transformer facade allowing transformers to be lazily loaded
-     * and initialized.
-     */
-    private static class LazyPushTransformer implements PushTransformer<Object, Object> {
-
-        private String source;
-        private String target;
-        private int weight;
-        private WeakReference<ClassLoader> classLoader;
-        private String className;
-        private PushTransformer<Object, Object> transformer;
-
-        public LazyPushTransformer(String source, String target, int weight, ClassLoader classLoader, String className) {
-            this.source = source;
-            this.target = target;
-            this.weight = weight;
-            this.classLoader = new WeakReference<ClassLoader>(classLoader);
-            this.className = className;
-        }
-
-        /**
-         * Load and instantiate the transformer class.
-         * 
-         * @return The transformer.
-         */
-        @SuppressWarnings("unchecked")
-        private PushTransformer<Object, Object> getTransformer() {
-            if (transformer == null) {
-                try {
-                    Class<PushTransformer<Object, Object>> transformerClass =
-                        (Class<PushTransformer<Object, Object>>)Class.forName(className, true, classLoader.get());
-                    Constructor<PushTransformer<Object, Object>> constructor = transformerClass.getConstructor();
-                    transformer = constructor.newInstance();
-                } catch (Exception e) {
-                    throw new IllegalStateException(e);
-                }
-            }
-            return transformer;
-        }
-
-        public String getSourceDataBinding() {
-            return source;
-        }
-
-        public String getTargetDataBinding() {
-            return target;
-        }
-
-        public int getWeight() {
-            return weight;
-        }
-
-        public void transform(Object source, Object sink, TransformationContext context) {
-            getTransformer().transform(source, sink, context);
-        }
-
-        public String toString() {
-            StringBuffer sb = new StringBuffer(super.toString());
-            sb.append(";className=").append(className);
-            return sb.toString();
-        }
-    }
-
-    
-    //FIXME The following methods should be on a different class from
-    // extension point
-    
-    public List<Transformer> getTransformerChain(String sourceType, String resultType) {
-        loadTransformers();
-        
-        String source = sourceType;
-        String result = 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;
-    }
-
-    @Override
-    public String toString() {
-        loadTransformers();
-        
-        return graph.toString();
-    }
-
-}