1 files changed, 129 insertions, 0 deletions
diff --git a/branches/sca-java-1.x/modules/interface-java/src/main/java/org/apache/tuscany/sca/interfacedef/java/impl/ClassCachedJavaInterfaceFactoryImpl.java b/branches/sca-java-1.x/modules/interface-java/src/main/java/org/apache/tuscany/sca/interfacedef/java/impl/ClassCachedJavaInterfaceFactoryImpl.java
new file mode 100644
index 0000000000..bb085c9cf9
--- /dev/null
+++ b/branches/sca-java-1.x/modules/interface-java/src/main/java/org/apache/tuscany/sca/interfacedef/java/impl/ClassCachedJavaInterfaceFactoryImpl.java
@@ -0,0 +1,129 @@
+/*
+ * 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.interfacedef.java.impl;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.WeakHashMap;
+import java.util.List;
+import java.util.Set;
+
+import org.apache.tuscany.sca.contribution.ModelFactoryExtensionPoint;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+import org.apache.tuscany.sca.extensibility.ServiceDiscovery;
+import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;
+import org.apache.tuscany.sca.interfacedef.java.impl.JavaInterfaceFactoryImpl;
+import org.apache.tuscany.sca.interfacedef.java.impl.PolicyJavaInterfaceVisitor;
+import org.apache.tuscany.sca.interfacedef.java.introspect.JavaInterfaceVisitor;
+import org.apache.tuscany.sca.policy.PolicyFactory;
+
+/**
+ * A factory for the Java interface model, using Class object as key to cache JavaInterface
+ *
+ * @version $Rev$ $Date$
+ */
+public class ClassCachedJavaInterfaceFactoryImpl extends JavaInterfaceFactoryImpl implements JavaInterfaceFactory {
+
+    private ModelFactoryExtensionPoint modelFactoryExtensionPoint;
+    private boolean loadedVisitors; 
+    
+    private static Cache cache = new Cache();
+
+    public ClassCachedJavaInterfaceFactoryImpl () {
+    }
+    
+    public ClassCachedJavaInterfaceFactoryImpl(ModelFactoryExtensionPoint modelFactoryExtensionPoint) {
+        this.modelFactoryExtensionPoint = modelFactoryExtensionPoint;
+    }
+    
+    @Override
+    public List<JavaInterfaceVisitor> getInterfaceVisitors() {
+        loadVisitors();
+        return super.getInterfaceVisitors();
+    }
+    
+    /**
+     * Load visitors declared under META-INF/services
+     */
+    @SuppressWarnings("unchecked")
+    private synchronized void loadVisitors() {
+        if (loadedVisitors)
+            return;
+        
+        if (modelFactoryExtensionPoint != null) {
+            PolicyFactory policyFactory = modelFactoryExtensionPoint.getFactory(PolicyFactory.class);
+            if (policyFactory != null) {
+                addInterfaceVisitor(new PolicyJavaInterfaceVisitor(policyFactory));
+            }
+        }
+        
+        // Get the databinding service declarations
+        Set<ServiceDeclaration> visitorDeclarations; 
+        try {
+            visitorDeclarations = ServiceDiscovery.getInstance().getServiceDeclarations(JavaInterfaceVisitor.class);
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+        
+        // Load data bindings
+        for (ServiceDeclaration visitorDeclaration: visitorDeclarations) {
+            JavaInterfaceVisitor visitor;
+            try {
+                Class<JavaInterfaceVisitor> visitorClass = (Class<JavaInterfaceVisitor>)visitorDeclaration.loadClass();
+                visitor = visitorClass.newInstance();
+            } catch (ClassNotFoundException e) {
+                throw new IllegalArgumentException(e);
+            } catch (InstantiationException e) {
+                throw new IllegalArgumentException(e);
+            } catch (IllegalAccessException e) {
+                throw new IllegalArgumentException(e);
+            }
+            addInterfaceVisitor(visitor);
+        }
+        
+        loadedVisitors = true;
+    }
+
+    public JavaInterface createJavaInterface(Class<?> interfaceClass) throws InvalidInterfaceException {
+
+        JavaInterface javaInterface = cache.get(interfaceClass);
+        if (javaInterface == null) {
+            javaInterface  = super.createJavaInterface(interfaceClass);
+            cache.put(interfaceClass, javaInterface);
+        }
+
+        return javaInterface;
+    }
+
+    private static class Cache {
+
+        private Map<Class,JavaInterface> _cache = new WeakHashMap<Class,JavaInterface>();
+
+        public synchronized JavaInterface get(Class<?> interfaceClass) {
+            return _cache.get(interfaceClass);
+        }
+
+        public synchronized void put(Class<?> interfaceClass, JavaInterface javaInterface) {
+            _cache.put(interfaceClass, javaInterface);
+        }
+    }
+
+}