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        public ClassLoadingAwareObjectInputStream(InputStream in) throws IOException {
038            super(in);
039        }
040    
041        protected Class<?> resolveClass(ObjectStreamClass classDesc) throws IOException, ClassNotFoundException {
042            ClassLoader cl = Thread.currentThread().getContextClassLoader();
043            return load(classDesc.getName(), cl);
044        }
045    
046        protected Class<?> resolveProxyClass(String[] interfaces) throws IOException, ClassNotFoundException {
047            ClassLoader cl = Thread.currentThread().getContextClassLoader();
048            Class[] cinterfaces = new Class[interfaces.length];
049            for (int i = 0; i < interfaces.length; i++) {
050                cinterfaces[i] = load(interfaces[i], cl);
051            }
052    
053            try {
054                return Proxy.getProxyClass(cl, cinterfaces);
055            } catch (IllegalArgumentException e) {
056                try {
057                    return Proxy.getProxyClass(FALLBACK_CLASS_LOADER, cinterfaces);
058                } catch (IllegalArgumentException e1) {
059                }
060    
061                throw new ClassNotFoundException(null, e);
062            }
063        }
064    
065        private Class<?> load(String className, ClassLoader cl) throws ClassNotFoundException {
066            try {
067                return Class.forName(className, false, cl);
068            } catch (ClassNotFoundException e) {
069                final Class<?> clazz = (Class<?>) primClasses.get(className);
070                if (clazz != null) {
071                    return clazz;
072                } else {
073                    return Class.forName(className, false, FALLBACK_CLASS_LOADER);
074                }
075            }
076        }
077    
078        static {
079            primClasses.put("boolean", boolean.class);
080            primClasses.put("byte", byte.class);
081            primClasses.put("char", char.class);
082            primClasses.put("short", short.class);
083            primClasses.put("int", int.class);
084            primClasses.put("long", long.class);
085            primClasses.put("float", float.class);
086            primClasses.put("double", double.class);
087            primClasses.put("void", void.class);
088        }
089    }