diff options
Diffstat (limited to 'tags/java/sca/2.0-M3-RC3a/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java')
| -rw-r--r-- | tags/java/sca/2.0-M3-RC3a/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/tags/java/sca/2.0-M3-RC3a/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java b/tags/java/sca/2.0-M3-RC3a/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java deleted file mode 100644 index 54d0d118bb..0000000000 --- a/tags/java/sca/2.0-M3-RC3a/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java +++ /dev/null @@ -1,174 +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.core; - -import java.lang.reflect.Constructor; -import java.lang.reflect.Method; -import java.lang.reflect.Modifier; -import java.security.AccessController; -import java.security.PrivilegedAction; -import java.util.HashMap; - -import org.apache.tuscany.sca.extensibility.ServiceDeclaration; -import org.apache.tuscany.sca.extensibility.ServiceDiscovery; - - - -/** - * Default implementation of a model factory extension point. - * - * @version $Rev$ $Date$ - */ -public class DefaultFactoryExtensionPoint implements FactoryExtensionPoint { - private ExtensionPointRegistry extensionPointRegistry; - private HashMap<Class<?>, Object> factories = new HashMap<Class<?>, Object>(); - - /** - * Constructs a new DefaultModelFactoryExtensionPoint. - */ - public DefaultFactoryExtensionPoint(ExtensionPointRegistry extensionPointRegistry) { - this.extensionPointRegistry = extensionPointRegistry; - } - - /** - * Add a model factory extension. - * - * @param factory The factory to add - */ - public void addFactory(Object factory) { - Class<?>[] interfaces = factory.getClass().getInterfaces(); - if (interfaces.length == 0) { - Class<?> sc = factory.getClass().getSuperclass(); - if (sc != Object.class) { - factories.put(sc, factory); - } - } else { - for (int i = 0; i<interfaces.length; i++) { - factories.put(interfaces[i], factory); - } - } - } - - /** - * Remove a model factory. - * - * @param factory The factory to remove - */ - public void removeFactory(Object factory) { - Class<?>[] interfaces = factory.getClass().getInterfaces(); - if (interfaces.length == 0) { - Class<?> sc = factory.getClass().getSuperclass(); - if (sc != Object.class) { - factories.remove(sc); - } - } else { - for (int i = 0; i<interfaces.length; i++) { - factories.remove(interfaces[i]); - } - } - } - - private ClassLoader setContextClassLoader(final ClassLoader classLoader) { - return AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() { - public ClassLoader run() { - ClassLoader tccl = Thread.currentThread().getContextClassLoader(); - if (classLoader != null) { - Thread.currentThread().setContextClassLoader(classLoader); - } - return tccl; - } - }); - } - - /** - * Get a factory implementing the given interface. - * @param factoryInterface The lookup key (factory interface) - * @return The factory - */ - public <T> T getFactory(Class<T> factoryInterface) { - Object factory = factories.get(factoryInterface); - if (factory == null) { - - // Dynamically load a factory class declared under META-INF/services - try { - ServiceDeclaration factoryDeclaration = - ServiceDiscovery.getInstance().getServiceDeclaration(factoryInterface.getName()); - if (factoryDeclaration != null) { - Class<?> factoryClass = factoryDeclaration.loadClass(); - try { - - // Default empty constructor - Constructor<?> constructor = factoryClass.getConstructor(); - factory = constructor.newInstance(); - } catch (NoSuchMethodException e) { - try { - - // Constructor taking the model factory extension point - Constructor<?> constructor = factoryClass.getConstructor(FactoryExtensionPoint.class); - factory = constructor.newInstance(this); - } catch (NoSuchMethodException e1) { - - // Constructor taking the extension point registry - Constructor<?> constructor = factoryClass.getConstructor(ExtensionPointRegistry.class); - factory = constructor.newInstance(extensionPointRegistry); - } - } - - // Cache the loaded factory - factories.put(factoryInterface, factory); - - return factoryInterface.cast(factory); - - } else { - - // If the input interface is an abstract class - if (!factoryInterface.isInterface() && Modifier.isAbstract(factoryInterface.getModifiers())) { - Method newInstanceMethod = factoryInterface.getDeclaredMethod("newInstance"); - ClassLoader tccl = setContextClassLoader(factoryInterface.getClassLoader()); - try { - - // Create a new instance - factory = newInstanceMethod.invoke(null); - - // Cache the factory - factories.put(factoryInterface, factory); - - return factoryInterface.cast(factory); - } catch (Exception e) { - // Sorry no factory found - return null; - } finally { - setContextClassLoader(tccl); - } - } else { - - // Sorry no factory found - return null; - } - } - } catch (Exception e) { - throw new IllegalArgumentException(e); - } - } else { - return factoryInterface.cast(factory); - } - } - -} |