SerializableUtils.java :  » ESB » apache-ode-2.0 » org » apache » ode » utils » Java Open Source

/*
 * 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.ode.utils;

import java.io.*;

/**
 * Utitlity methods for <code>Serializable</code> objects.
 */
public class SerializableUtils {

    /**
     * Clone a <code>Serializable</code> object; for use when a
     * <code>clone()</code> method is not available.
     *
     * @param obj
     *          object to clone
     *
     * @return clone object
     *
     * @throws RuntimeException
     */
    public static Object cloneSerializable(Object obj) {
        Object ret = null;

        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream(StreamUtils.DEFAULT_BUFFER_SIZE);
            ObjectOutputStream oos = new ObjectOutputStream(baos);
            oos.writeObject(obj);
            oos.close();

            ByteArrayInputStream bis = new ByteArrayInputStream(baos.toByteArray());
            ObjectInputStream ois = new ObjectInputStream(bis);

            try {
                ret = ois.readObject();
            }
            catch (ClassNotFoundException cnfe) {
                assert false;
            }

            ois.close();
        }
        catch (IOException ioex) {
            throw new RuntimeException("Unable to clone object: " + obj);
        }

        return ret;
    }

    public static byte[] toBytes(Object obj) {
        ByteArrayOutputStream bos = new ByteArrayOutputStream(StreamUtils.DEFAULT_BUFFER_SIZE);
        try {
            ObjectOutputStream oos = new ObjectOutputStream(bos);
            oos.writeObject(obj);
        }
        catch (IOException e) {
            throw new RuntimeException("Error serializing object: " + obj.getClass() + ".", e);
        }
        return bos.toByteArray();
    }

    public static Object toObject(InputStream binaryStream, final ClassLoader cl) {
        try {
            ObjectInputStream ois = new ObjectInputStream(binaryStream) {

                protected Class<?> resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException {
                    String name = desc.getName();
                    try {
                        return Class.forName(name, false, cl);
                    } catch (ClassNotFoundException ex) {
                        return super.resolveClass(desc);
                    }
                }
            };
            return ois.readObject();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static Object toObject(byte[] arr, final ClassLoader cl) {
        ByteArrayInputStream bis = new ByteArrayInputStream(arr);
        return toObject(bis, cl);
    }

}