imagecodecfactory.java

mina是以Java实现的一个开源的网络程序框架

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 *   Licensed to the Apache Software Foundation (ASF) under one
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 *   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.
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 */
package org.apache.mina.example.imagine.step1.codec;

import org.apache.mina.filter.codec.ProtocolCodecFactory;
import org.apache.mina.filter.codec.ProtocolEncoder;
import org.apache.mina.filter.codec.ProtocolDecoder;
import org.apache.mina.core.session.IoSession;

/**
 * a {@link ProtocolCodecFactory} for the tutorial on how to write a protocol codec
 *
 * @author The Apache MINA Project ([e-mail])
 * @version $Rev$, $Date$
 */

public class ImageCodecFactory implements ProtocolCodecFactory {
    private ProtocolEncoder encoder;
    private ProtocolDecoder decoder;

    public ImageCodecFactory(boolean client) {
        if (client) {
            encoder = new ImageRequestEncoder();
            decoder = new ImageResponseDecoder();
        } else {
            encoder = new ImageResponseEncoder();
            decoder = new ImageRequestDecoder();
        }
    }

    public ProtocolEncoder getEncoder(IoSession ioSession) throws Exception {
        return encoder;
    }

    public ProtocolDecoder getDecoder(IoSession ioSession) throws Exception {
        return decoder;
    }
}