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    public class ClassLoadingAwareObjectInputStream extends ObjectInputStream {
027    
028        private static final ClassLoader FALLBACK_CLASS_LOADER = ClassLoadingAwareObjectInputStream.class.getClassLoader();
029        /** <p>Maps primitive type names to corresponding class objects.</p> */
030        private static final HashMap<String, Class> primClasses = new HashMap<String, Class>(8, 1.0F);
031        public ClassLoadingAwareObjectInputStream(InputStream in) throws IOException {
032            super(in);
033        }
034    
035        protected Class resolveClass(ObjectStreamClass classDesc) throws IOException, ClassNotFoundException {
036            ClassLoader cl = Thread.currentThread().getContextClassLoader();
037            return load(classDesc.getName(), cl);
038        }
039    
040        protected Class resolveProxyClass(String[] interfaces) throws IOException, ClassNotFoundException {
041            ClassLoader cl = Thread.currentThread().getContextClassLoader();
042            Class[] cinterfaces = new Class[interfaces.length];
043            for (int i = 0; i < interfaces.length; i++) {
044                cinterfaces[i] = load(interfaces[i], cl);
045            }
046    
047            try {
048                return Proxy.getProxyClass(cinterfaces[0].getClassLoader(), cinterfaces);
049            } catch (IllegalArgumentException e) {
050                throw new ClassNotFoundException(null, e);
051            }
052        }
053    
054        private Class load(String className, ClassLoader cl)
055                throws ClassNotFoundException {
056            try {
057                return Class.forName(className, false, cl);
058            } catch (ClassNotFoundException e) {
059                final Class clazz = (Class) primClasses.get(className);
060                if (clazz != null) {
061                    return clazz;
062                } else {
063                    return Class.forName(className, false, FALLBACK_CLASS_LOADER);
064                }
065            }
066        }
067        
068        
069        
070        static {
071            primClasses.put("boolean", boolean.class);
072            primClasses.put("byte", byte.class);
073            primClasses.put("char", char.class);
074            primClasses.put("short", short.class);
075            primClasses.put("int", int.class);
076            primClasses.put("long", long.class);
077            primClasses.put("float", float.class);
078            primClasses.put("double", double.class);
079            primClasses.put("void", void.class);
080        }
081    
082    }