001package org.apache.commons.jcs3.utils.serialization;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 *
012 *   http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import java.io.ByteArrayInputStream;
023import java.io.ByteArrayOutputStream;
024import java.io.IOException;
025import java.io.ObjectInputStream;
026import java.io.ObjectOutputStream;
027
028import org.apache.commons.jcs3.engine.behavior.IElementSerializer;
029import org.apache.commons.jcs3.io.ObjectInputStreamClassLoaderAware;
030
031/**
032 * Performs default serialization and de-serialization.
033 */
034public class StandardSerializer
035    implements IElementSerializer
036{
037    /**
038     * Serializes an object using default serialization.
039     * <p>
040     * @param obj
041     * @return byte[]
042     * @throws IOException
043     */
044    @Override
045    public <T> byte[] serialize(final T obj)
046        throws IOException
047    {
048        final ByteArrayOutputStream baos = new ByteArrayOutputStream();
049
050        try (ObjectOutputStream oos = new ObjectOutputStream(baos))
051        {
052            oos.writeUnshared(obj);
053        }
054
055        return baos.toByteArray();
056    }
057
058    /**
059     * Uses default de-serialization to turn a byte array into an object. All exceptions are
060     * converted into IOExceptions.
061     * <p>
062     * @param data data bytes
063     * @param loader class loader to use
064     * @return Object
065     * @throws IOException
066     * @throws ClassNotFoundException
067     */
068    @Override
069    public <T> T deSerialize(final byte[] data, final ClassLoader loader)
070        throws IOException, ClassNotFoundException
071    {
072        try (ByteArrayInputStream bais = new ByteArrayInputStream(data);
073             ObjectInputStream ois = new ObjectInputStreamClassLoaderAware(bais, loader))
074        {
075            @SuppressWarnings("unchecked") // Need to cast from Object
076            final
077            T readObject = (T) ois.readObject();
078            return readObject;
079        }
080    }
081}