/**
* 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.cxf.dosgi.dsw.handlers;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.osgi.framework.ServiceException;
public class ServiceInvocationHandler implements InvocationHandler {
private final static String REMOTE_EXCEPTION_TYPE = "REMOTE";
private Map<Method, List<Class<?>>> exceptionsMap
= new HashMap<Method, List<Class<?>>>();
private Object serviceObject;
public ServiceInvocationHandler(Object serviceObject, Class<?> iType) {
this.serviceObject = serviceObject;
introspectType(iType);
}
public Object invoke(Object proxy, Method m, Object[] params) throws Throwable {
try {
return m.invoke(serviceObject, params);
} catch (Throwable ex) {
Throwable theCause = ex.getCause() == null ? ex : ex.getCause();
List<Class<?>> excTypes = exceptionsMap.get(m);
if (excTypes != null) {
for (Class<?> type : excTypes) {
if (type.isAssignableFrom(theCause.getClass())) {
throw theCause;
}
}
}
throw new InvocationTargetException(
new ServiceException(REMOTE_EXCEPTION_TYPE, theCause));
}
}
private void introspectType(Class<?> iType) {
for (Method m : iType.getDeclaredMethods()) {
for (Class<?> excType : m.getExceptionTypes()) {
if (Exception.class.isAssignableFrom(excType)) {
List<Class<?>> types = exceptionsMap.get(m);
if (types == null) {
types = new ArrayList<Class<?>>();
exceptionsMap.put(m, types);
}
types.add(excType);
}
}
}
}
}