001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.activemq.util;
018
019 import java.io.IOException;
020 import java.io.InputStream;
021 import java.io.ObjectInputStream;
022 import java.io.ObjectStreamClass;
023 import java.lang.reflect.Proxy;
024 import java.util.HashMap;
025
026 @SuppressWarnings("rawtypes")
027 public class ClassLoadingAwareObjectInputStream extends ObjectInputStream {
028
029 private static final ClassLoader FALLBACK_CLASS_LOADER =
030 ClassLoadingAwareObjectInputStream.class.getClassLoader();
031
032 /**
033 * Maps primitive type names to corresponding class objects.
034 */
035 private static final HashMap<String, Class> primClasses = new HashMap<String, Class>(8, 1.0F);
036
037 private final ClassLoader inLoader;
038
039 public ClassLoadingAwareObjectInputStream(InputStream in) throws IOException {
040 super(in);
041 inLoader = in.getClass().getClassLoader();
042 }
043
044 protected Class<?> resolveClass(ObjectStreamClass classDesc) throws IOException, ClassNotFoundException {
045 ClassLoader cl = Thread.currentThread().getContextClassLoader();
046 return load(classDesc.getName(), cl, inLoader);
047 }
048
049 protected Class<?> resolveProxyClass(String[] interfaces) throws IOException, ClassNotFoundException {
050 ClassLoader cl = Thread.currentThread().getContextClassLoader();
051 Class[] cinterfaces = new Class[interfaces.length];
052 for (int i = 0; i < interfaces.length; i++) {
053 cinterfaces[i] = load(interfaces[i], cl);
054 }
055
056 try {
057 return Proxy.getProxyClass(cl, cinterfaces);
058 } catch (IllegalArgumentException e) {
059 try {
060 return Proxy.getProxyClass(inLoader, cinterfaces);
061 } catch (IllegalArgumentException e1) {
062 // ignore
063 }
064 try {
065 return Proxy.getProxyClass(FALLBACK_CLASS_LOADER, cinterfaces);
066 } catch (IllegalArgumentException e2) {
067 // ignore
068 }
069
070 throw new ClassNotFoundException(null, e);
071 }
072 }
073
074 private Class<?> load(String className, ClassLoader... cl) throws ClassNotFoundException {
075 for (ClassLoader loader : cl) {
076 try {
077 return Class.forName(className, false, loader);
078 } catch (ClassNotFoundException e) {
079 // ignore
080 }
081 }
082 // fallback
083 final Class<?> clazz = (Class<?>) primClasses.get(className);
084 if (clazz != null) {
085 return clazz;
086 } else {
087 return Class.forName(className, false, FALLBACK_CLASS_LOADER);
088 }
089 }
090
091 static {
092 primClasses.put("boolean", boolean.class);
093 primClasses.put("byte", byte.class);
094 primClasses.put("char", char.class);
095 primClasses.put("short", short.class);
096 primClasses.put("int", int.class);
097 primClasses.put("long", long.class);
098 primClasses.put("float", float.class);
099 primClasses.put("double", double.class);
100 primClasses.put("void", void.class);
101 }
102 }