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diff --git a/sca-java-1.x/branches/sca-java-1.0.1/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/DefaultProviderFactoryExtensionPoint.java b/sca-java-1.x/branches/sca-java-1.0.1/modules/core-spi/src/main/java/org/apache/tuscany/sca/provider/DefaultProviderFactoryExtensionPoint.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.provider;
+
+import java.io.IOException;
+import java.lang.reflect.Constructor;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Implementation;
+import org.apache.tuscany.sca.contribution.util.ServiceConfigurationUtil;
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentReference;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+
+/**
+ * Default implementation of a provider factory extension point.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultProviderFactoryExtensionPoint implements ProviderFactoryExtensionPoint {
+    
+    private ExtensionPointRegistry registry;
+    private final Map<Class<?>, ProviderFactory> providerFactories = new HashMap<Class<?>, ProviderFactory>();
+    private boolean loaded;
+
+    /**
+     * The default constructor. Does nothing.
+     *
+     */
+    public DefaultProviderFactoryExtensionPoint(ExtensionPointRegistry registry) {
+        this.registry = registry;
+    }
+
+    /**
+     * Add a provider factory.
+     * 
+     * @param providerFactory The provider factory
+     */
+    public void addProviderFactory(ProviderFactory providerFactory) {
+        providerFactories.put(providerFactory.getModelType(), providerFactory);
+    }
+    
+    /**
+     * Remove a provider factory.
+     * 
+     * @param providerFactory The provider factory
+     */
+    public void removeProviderFactory(ProviderFactory providerFactory) {
+        providerFactories.remove(providerFactory.getModelType());
+    }
+    
+    /**
+     * Returns the provider factory associated with the given model type.
+     * @param modelType A model type
+     * @return The provider factory associated with the given model type
+     */
+    public ProviderFactory getProviderFactory(Class<?> modelType) {
+        loadProviderFactories();
+        
+        Class<?>[] classes = modelType.getInterfaces();
+        for (Class<?> c : classes) {
+            ProviderFactory factory = providerFactories.get(c);
+            if (factory != null) {
+                return factory;
+            }
+        }
+        return providerFactories.get(modelType);
+    }
+
+    /**
+     * Load provider factories declared under META-INF/services.
+     * @param registry
+     */
+    private void loadProviderFactories() {
+        if (loaded)
+            return;
+
+        loadProviderFactories(BindingProviderFactory.class);
+        loadProviderFactories(ImplementationProviderFactory.class);
+        
+        loaded = true;
+    }
+    
+    /**
+     * Load provider factories declared under META-INF/services.
+     * @param registry
+     * @param factoryClass
+     * @return
+     */
+    private List<ProviderFactory> loadProviderFactories(Class<?> factoryClass) {
+
+        // Get the provider factory service declarations
+        List<String> factoryDeclarations; 
+        try {
+            ClassLoader classLoader = factoryClass.getClassLoader();
+            factoryDeclarations = ServiceConfigurationUtil.getServiceClassNames(classLoader, factoryClass.getName());
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+        
+        // Get the target extension point
+        ProviderFactoryExtensionPoint factoryExtensionPoint = registry.getExtensionPoint(ProviderFactoryExtensionPoint.class);
+        List<ProviderFactory> factories = new ArrayList<ProviderFactory>();
+        
+        for (String factoryDeclaration: factoryDeclarations) {
+            Map<String, String> attributes = ServiceConfigurationUtil.parseServiceDeclaration(factoryDeclaration);
+            String className = attributes.get("class");
+            
+            // Load an implementation provider factory
+            if (factoryClass == ImplementationProviderFactory.class) {
+                String modelTypeName = attributes.get("model");
+                
+                // Create a provider factory wrapper and register it
+                ImplementationProviderFactory factory = new LazyImplementationProviderFactory(registry, modelTypeName, className);
+                factoryExtensionPoint.addProviderFactory(factory);
+                factories.add(factory);
+
+            } else if (factoryClass == BindingProviderFactory.class) {
+
+                // Load a binding provider factory
+                String modelTypeName = attributes.get("model");
+                
+                // Create a provider factory wrapper and register it
+                BindingProviderFactory factory = new LazyBindingProviderFactory(registry, modelTypeName, className);
+                factoryExtensionPoint.addProviderFactory(factory);
+                factories.add(factory);
+            }
+        }
+        return factories;
+    }
+
+    /**
+     * A wrapper around an implementation provider factory allowing lazy
+     * loading and initialization of implementation providers.
+     */
+    private static class LazyBindingProviderFactory implements BindingProviderFactory {
+
+        private ExtensionPointRegistry registry;
+        private String modelTypeName;
+        private String className;
+        private BindingProviderFactory factory;
+        private Class modelType;
+        
+        private LazyBindingProviderFactory(ExtensionPointRegistry registry, String modelTypeName, String className) {
+            this.registry = registry;
+            this.modelTypeName = modelTypeName;
+            this.className = className;
+        }
+
+        @SuppressWarnings("unchecked")
+        private BindingProviderFactory getFactory() {
+            if (factory == null) {
+                try {
+                    ClassLoader classLoader = BindingProviderFactory.class.getClassLoader();
+                    Class<BindingProviderFactory> factoryClass = (Class<BindingProviderFactory>)Class.forName(className, true, classLoader);
+                    Constructor<BindingProviderFactory> constructor = factoryClass.getConstructor(ExtensionPointRegistry.class);
+                    factory = constructor.newInstance(registry);
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return factory;
+        }
+
+        @SuppressWarnings("unchecked")
+        public ReferenceBindingProvider createReferenceBindingProvider(RuntimeComponent component, RuntimeComponentReference reference, Binding binding) {
+            return getFactory().createReferenceBindingProvider(component, reference, binding);
+        }
+        
+        @SuppressWarnings("unchecked")
+        public ServiceBindingProvider createServiceBindingProvider(RuntimeComponent component, RuntimeComponentService service, Binding binding) {
+            return getFactory().createServiceBindingProvider(component, service, binding);
+        }
+        
+        public Class getModelType() {
+            if (modelType == null) {
+                try {
+                    ClassLoader classLoader = BindingProviderFactory.class.getClassLoader();
+                    modelType = Class.forName(modelTypeName, true, classLoader);
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return modelType;
+        }
+
+    }
+
+    /**
+     * A wrapper around an implementation provider factory allowing lazy
+     * loading and initialization of implementation providers.
+     */
+    private class LazyImplementationProviderFactory implements ImplementationProviderFactory {
+
+        private ExtensionPointRegistry registry;
+        private String modelTypeName;
+        private String className;
+        private ImplementationProviderFactory factory;
+        private Class modelType;
+        
+        private LazyImplementationProviderFactory(ExtensionPointRegistry registry, String modelTypeName, String className) {
+            this.registry = registry;
+            this.modelTypeName = modelTypeName;
+            this.className = className;
+        }
+
+        @SuppressWarnings("unchecked")
+        private ImplementationProviderFactory getFactory() {
+            if (factory == null) {
+                try {
+                    ClassLoader classLoader = ImplementationProviderFactory.class.getClassLoader();
+                    Class<ImplementationProviderFactory> factoryClass = (Class<ImplementationProviderFactory>)Class.forName(className, true, classLoader);
+                    Constructor<ImplementationProviderFactory> constructor = factoryClass.getConstructor(ExtensionPointRegistry.class);
+                    factory = constructor.newInstance(registry);
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return factory;
+        }
+
+        @SuppressWarnings("unchecked")
+        public ImplementationProvider createImplementationProvider(RuntimeComponent component, Implementation Implementation) {
+            return getFactory().createImplementationProvider(component, Implementation);
+        }
+
+        public Class getModelType() {
+            if (modelType == null) {
+                try {
+                    ClassLoader classLoader = ImplementationProviderFactory.class.getClassLoader();
+                    modelType = Class.forName(modelTypeName, true, classLoader);
+                } catch (Exception e) {
+                    throw new IllegalStateException(e);
+                }
+            }
+            return modelType;
+        }
+
+    }
+
+}