ActiveMQ example source code file (ClassLoadingAwareObjectInputStream.java)

This example ActiveMQ source code file (ClassLoadingAwareObjectInputStream.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - ActiveMQ tags/keywords

class, class, classloader, classloader, classloadingawareobjectinputstream, classnotfoundexception, classnotfoundexception, fallback_class_loader, hashmap, illegalargumentexception, io, ioexception, ioexception, objectinputstream, reflection, util

The ActiveMQ ClassLoadingAwareObjectInputStream.java source code

/**
 * 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.activemq.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectStreamClass;
import java.lang.reflect.Proxy;
import java.util.HashMap;

public class ClassLoadingAwareObjectInputStream extends ObjectInputStream {

    private static final ClassLoader FALLBACK_CLASS_LOADER = ClassLoadingAwareObjectInputStream.class.getClassLoader();
    /** <p>Maps primitive type names to corresponding class objects.
 */
    private static final HashMap<String, Class> primClasses = new HashMap(8, 1.0F);
    public ClassLoadingAwareObjectInputStream(InputStream in) throws IOException {
        super(in);
    }

    protected Class resolveClass(ObjectStreamClass classDesc) throws IOException, ClassNotFoundException {
        ClassLoader cl = Thread.currentThread().getContextClassLoader();
        return load(classDesc.getName(), cl);
    }

    protected Class resolveProxyClass(String[] interfaces) throws IOException, ClassNotFoundException {
        ClassLoader cl = Thread.currentThread().getContextClassLoader();
        Class[] cinterfaces = new Class[interfaces.length];
        for (int i = 0; i < interfaces.length; i++) {
            cinterfaces[i] = load(interfaces[i], cl);
        }

        try {
            return Proxy.getProxyClass(cinterfaces[0].getClassLoader(), cinterfaces);
        } catch (IllegalArgumentException e) {
            throw new ClassNotFoundException(null, e);
        }
    }

    private Class load(String className, ClassLoader cl)
            throws ClassNotFoundException {
        try {
            return Class.forName(className, false, cl);
        } catch (ClassNotFoundException e) {
            final Class clazz = (Class) primClasses.get(className);
            if (clazz != null) {
                return clazz;
            } else {
                return Class.forName(className, false, FALLBACK_CLASS_LOADER);
            }
        }
    }
    
    
    
    static {
        primClasses.put("boolean", boolean.class);
        primClasses.put("byte", byte.class);
        primClasses.put("char", char.class);
        primClasses.put("short", short.class);
        primClasses.put("int", int.class);
        primClasses.put("long", long.class);
        primClasses.put("float", float.class);
        primClasses.put("double", double.class);
        primClasses.put("void", void.class);
    }

}