From e5b7380c874745c989d1816b8f552504f038e1bc Mon Sep 17 00:00:00 2001 From: lresende Date: Thu, 26 Sep 2013 20:33:20 +0000 Subject: 2.0 branch for possible maintenance release git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1526672 13f79535-47bb-0310-9956-ffa450edef68 --- .../sca/core/DefaultFactoryExtensionPoint.java | 189 +++++++++++++++++++++ 1 file changed, 189 insertions(+) create mode 100644 sca-java-2.x/branches/2.0/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java (limited to 'sca-java-2.x/branches/2.0/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java') diff --git a/sca-java-2.x/branches/2.0/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java b/sca-java-2.x/branches/2.0/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java new file mode 100644 index 0000000000..ae7d83009e --- /dev/null +++ b/sca-java-2.x/branches/2.0/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/DefaultFactoryExtensionPoint.java @@ -0,0 +1,189 @@ +/* + * 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 static org.apache.tuscany.sca.extensibility.ServiceHelper.newInstance; + +import java.lang.reflect.Method; +import java.lang.reflect.Modifier; +import java.security.AccessController; +import java.security.PrivilegedAction; +import java.security.PrivilegedActionException; +import java.security.PrivilegedExceptionAction; +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; + +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; + + + +/** + * Default implementation of a model factory extension point. + * + * @version $Rev$ $Date$ + */ +public class DefaultFactoryExtensionPoint implements FactoryExtensionPoint { + private ExtensionPointRegistry registry; + private Map, Object> factories = new ConcurrentHashMap, Object>(); + + /** + * Constructs a new DefaultModelFactoryExtensionPoint. + */ + public DefaultFactoryExtensionPoint(ExtensionPointRegistry extensionPointRegistry) { + this.registry = 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 = 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() { + 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 getFactory(final Class factoryInterface) { + Object factory = factories.get(factoryInterface); + if (factory == null) { + + // Dynamically load a factory class declared under META-INF/services + try { + ServiceDeclaration factoryDeclaration = + registry.getServiceDiscovery().getServiceDeclaration(factoryInterface); + if (factoryDeclaration != null) { + try { + // Constructor taking the extension point registry + factory = newInstance(registry, factoryDeclaration); + } catch (NoSuchMethodException e) { + factory = newInstance(factoryDeclaration.loadClass(), FactoryExtensionPoint.class, this); + } + + // 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; + try { + newInstanceMethod = AccessController.doPrivileged(new PrivilegedExceptionAction() { + public Method run() throws Exception { + return factoryInterface.getDeclaredMethod("newInstance"); + } + }); + } catch (PrivilegedActionException e){ + throw (Exception)e.getException(); + } + + ClassLoader cl = AccessController.doPrivileged(new PrivilegedAction() { + public ClassLoader run() { + ClassLoader cl = factoryInterface.getClassLoader(); + return cl; + } + }); + ClassLoader tccl = setContextClassLoader(cl); + try { + try { + final Method fnewInstanceMethod = newInstanceMethod; + factory = AccessController.doPrivileged(new PrivilegedExceptionAction() { + public Object run() throws Exception { + Object factory = fnewInstanceMethod.invoke(null); + return factory; + } + }); + } catch (PrivilegedActionException e){ + throw (Exception)e.getException(); + } + + // 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); + } + } + +} -- cgit v1.2.3