/*
 * (C) 2007-2012 Alibaba Group Holding Limited.
 * 
 * Licensed 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.
 * Authors:
 *   wuhua <wq163@163.com> , boyan <killme2008@gmail.com>
 */
package com.taobao.metamorphosis.utils.codec.impl;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.log4j.Logger;

import com.caucho.hessian.io.HessianOutput;
import com.taobao.metamorphosis.utils.codec.Serializer;


/**
 * 
 * @author wuxin
 * @since 1.0, 2009-10-20 ����10:03:24
 */
public class Hessian1Serializer implements Serializer {

    private final Log logger = LogFactory.getLog(Hessian1Serializer.class);


    /**
     * @see com.taobao.notify.codec.Serializer#encodeObject(Object)
     */
    @Override
    public byte[] encodeObject(final Object obj) throws IOException {
        ByteArrayOutputStream baos = null;
        HessianOutput output = null;
        try {
            baos = new ByteArrayOutputStream(1024);
            output = new HessianOutput(baos);
            output.startCall();
            output.writeObject(obj);
            output.completeCall();
        }
        catch (final IOException ex) {
            throw ex;
        }
        finally {
            if (output != null) {
                try {
                    baos.close();
                }
                catch (final IOException ex) {
                    this.logger.error("Failed to close stream.", ex);
                }
            }
        }
        return baos != null ? baos.toByteArray() : null;
    }

}