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.camel.processor.aggregate.jdbc;
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    /**
027     * This class is copied from the Apache ActiveMQ project.
028     */
029    public class ClassLoadingAwareObjectInputStream extends ObjectInputStream {
030    
031        private static final ClassLoader FALLBACK_CLASS_LOADER = ClassLoadingAwareObjectInputStream.class.getClassLoader();
032        /**
033         * <p>Maps primitive type names to corresponding class objects.</p>
034         */
035        private static final HashMap<String, Class> PRIM_CLASSES = new HashMap<String, Class>(8, 1.0F);
036    
037        public ClassLoadingAwareObjectInputStream(InputStream in) throws IOException {
038            super(in);
039        }
040    
041        @Override
042        protected Class resolveClass(ObjectStreamClass classDesc) throws IOException, ClassNotFoundException {
043            ClassLoader cl = Thread.currentThread().getContextClassLoader();
044            return load(classDesc.getName(), cl);
045        }
046    
047        @Override
048        protected Class resolveProxyClass(String[] interfaces) throws IOException, ClassNotFoundException {
049            ClassLoader cl = Thread.currentThread().getContextClassLoader();
050            Class[] cinterfaces = new Class[interfaces.length];
051            for (int i = 0; i < interfaces.length; i++) {
052                cinterfaces[i] = load(interfaces[i], cl);
053            }
054    
055            try {
056                return Proxy.getProxyClass(cinterfaces[0].getClassLoader(), cinterfaces);
057            } catch (IllegalArgumentException e) {
058                throw new ClassNotFoundException(null, e);
059            }
060        }
061    
062        private Class load(String className, ClassLoader cl) throws ClassNotFoundException {
063            try {
064                return Class.forName(className, false, cl);
065            } catch (ClassNotFoundException e) {
066                final Class clazz = PRIM_CLASSES.get(className);
067                if (clazz != null) {
068                    return clazz;
069                } else {
070                    return Class.forName(className, false, FALLBACK_CLASS_LOADER);
071                }
072            }
073        }
074    
075        static {
076            PRIM_CLASSES.put("boolean", boolean.class);
077            PRIM_CLASSES.put("byte", byte.class);
078            PRIM_CLASSES.put("char", char.class);
079            PRIM_CLASSES.put("short", short.class);
080            PRIM_CLASSES.put("int", int.class);
081            PRIM_CLASSES.put("long", long.class);
082            PRIM_CLASSES.put("float", float.class);
083            PRIM_CLASSES.put("double", double.class);
084            PRIM_CLASSES.put("void", void.class);
085        }
086    
087    }