/*
* 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.implementation.java.introspect.impl;
import static org.apache.tuscany.sca.implementation.java.introspect.impl.JavaIntrospectionHelper.getAllInterfaces;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Set;
import java.util.logging.Logger;
import org.apache.tuscany.sca.assembly.AssemblyFactory;
import org.apache.tuscany.sca.assembly.Service;
import org.apache.tuscany.sca.implementation.java.IntrospectionException;
import org.apache.tuscany.sca.implementation.java.JavaImplementation;
import org.apache.tuscany.sca.implementation.java.impl.JavaElementImpl;
import org.apache.tuscany.sca.interfacedef.InvalidInterfaceException;
import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceContract;
import org.apache.tuscany.sca.interfacedef.java.JavaInterfaceFactory;
import org.osoa.sca.CallableReference;
import org.osoa.sca.annotations.Callback;
import org.osoa.sca.annotations.Remotable;
/**
* Processes an {@link org.osoa.sca.annotations.Service} annotation and updates
* the component type with corresponding {@link Service}s. Also processes
* related {@link org.osoa.sca.annotations.Callback} annotations.
*
* @version $Rev: 659259 $ $Date: 2008-05-22 22:08:20 +0100 (Thu, 22 May 2008) $
*/
public class ServiceProcessor extends BaseJavaClassVisitor {
private static final Logger logger = Logger.getLogger(ServiceProcessor.class.getName());
private JavaInterfaceFactory javaFactory;
public ServiceProcessor(AssemblyFactory assemblyFactory, JavaInterfaceFactory javaFactory) {
super(assemblyFactory);
this.javaFactory = javaFactory;
}
@Override
public <T> void visitClass(Class<T> clazz, JavaImplementation type) throws IntrospectionException {
org.osoa.sca.annotations.Service annotation = clazz.getAnnotation(org.osoa.sca.annotations.Service.class);
if (annotation == null) {
// scan interfaces for remotable
Set<Class> interfaces = getAllInterfaces(clazz);
for (Class<?> interfaze : interfaces) {
if (interfaze.isAnnotationPresent(Remotable.class) || interfaze.isAnnotationPresent(Callback.class)) {
Service service;
try {
service = createService(interfaze);
} catch (InvalidInterfaceException e) {
throw new IntrospectionException(e);
}
type.getServices().add(service);
}
}
return;
}
Class<?>[] interfaces = annotation.interfaces();
if (interfaces.length == 0) {
Class<?> interfaze = annotation.value();
if (Void.class.equals(interfaze)) {
//throw new IllegalServiceDefinitionException("No interfaces specified");
logger.warning("Ignoring @Service annotation. No interfaces specified. class = "+clazz.getName());
} else {
interfaces = new Class<?>[1];
interfaces[0] = interfaze;
}
}
for (Class<?> interfaze : interfaces) {
try {
Service service = createService(interfaze);
type.getServices().add(service);
} catch (InvalidInterfaceException e) {
throw new IntrospectionException(e);
}
}
}
@Override
public void visitMethod(Method method, JavaImplementation type) throws IntrospectionException {
Callback annotation = method.getAnnotation(Callback.class);
if (annotation == null) {
return;
}
if(Modifier.isPrivate(method.getModifiers())) {
throw new IllegalCallbackReferenceException("Illegal annotation @Callback found on "+method, method);
}
if (method.getParameterTypes().length != 1) {
throw new IllegalCallbackReferenceException("Setter must have one parameter", method);
}
JavaElementImpl element = new JavaElementImpl(method, 0);
createCallback(type, element);
}
@Override
public void visitField(Field field, JavaImplementation type) throws IntrospectionException {
Callback annotation = field.getAnnotation(Callback.class);
if (annotation == null) {
return;
}
if(Modifier.isPrivate(field.getModifiers())) {
throw new IllegalCallbackReferenceException("Illegal annotation @Callback found on "+field, field);
}
JavaElementImpl element = new JavaElementImpl(field);
createCallback(type, element);
}
/**
* @param type
* @param element
* @throws IllegalCallbackReferenceException
*/
private void createCallback(JavaImplementation type, JavaElementImpl element)
throws IllegalCallbackReferenceException {
Service callbackService = null;
Class<?> callbackClass = element.getType();
Type genericType = element.getGenericType();
Class<?> baseType = callbackClass;
if(CallableReference.class.isAssignableFrom(baseType)) {
// @Callback protected CallableReference<MyCallback> callback;
// The base type will be MyCallback
baseType = JavaIntrospectionHelper.getBusinessInterface(baseType, genericType);
}
for (Service service : type.getServices()) {
JavaInterface javaInterface = (JavaInterface)service.getInterfaceContract().getCallbackInterface();
if (javaInterface != null && baseType == javaInterface.getJavaClass()) {
callbackService = service;
}
}
if (callbackService == null) {
throw new IllegalCallbackReferenceException("Callback type does not match a service callback interface: " + type.getName() );
}
if(type.getCallbackMembers().get(baseType.getName()) == null) {
type.getCallbackMembers().put(baseType.getName(), new ArrayList<JavaElementImpl>());
}
type.getCallbackMembers().get(baseType.getName()).add(element);
}
public Service createService(Class<?> interfaze) throws InvalidInterfaceException {
Service service = assemblyFactory.createService();
JavaInterfaceContract interfaceContract = javaFactory.createJavaInterfaceContract();
service.setInterfaceContract(interfaceContract);
// create a relative URI
service.setName(interfaze.getSimpleName());
JavaInterface callInterface = javaFactory.createJavaInterface(interfaze);
service.getInterfaceContract().setInterface(callInterface);
if (callInterface.getCallbackClass() != null) {
JavaInterface callbackInterface = javaFactory.createJavaInterface(callInterface.getCallbackClass());
service.getInterfaceContract().setCallbackInterface(callbackInterface);
}
return service;
}
}