/*
* Copyright 1999-2012 Alibaba Group.
*
* 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.
*/
package com.alibaba.dubbo.remoting.transport.codec;
import java.io.IOException;
import com.alibaba.dubbo.common.io.UnsafeByteArrayInputStream;
import com.alibaba.dubbo.common.io.UnsafeByteArrayOutputStream;
import com.alibaba.dubbo.common.utils.Assert;
import com.alibaba.dubbo.remoting.Channel;
import com.alibaba.dubbo.remoting.Codec;
import com.alibaba.dubbo.remoting.Codec2;
import com.alibaba.dubbo.remoting.buffer.ChannelBuffer;
/**
* @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
*/
public class CodecAdapter implements Codec2 {
private Codec codec;
public CodecAdapter(Codec codec) {
Assert.notNull(codec, "codec == null");
this.codec = codec;
}
public void encode(Channel channel, ChannelBuffer buffer, Object message)
throws IOException {
UnsafeByteArrayOutputStream os = new UnsafeByteArrayOutputStream(1024);
codec.encode(channel, os, message);
buffer.writeBytes(os.toByteArray());
}
public Object decode(Channel channel, ChannelBuffer buffer) throws IOException {
byte[] bytes = new byte[buffer.readableBytes()];
int savedReaderIndex = buffer.readerIndex();
buffer.readBytes(bytes);
UnsafeByteArrayInputStream is = new UnsafeByteArrayInputStream(bytes);
Object result = codec.decode(channel, is);
buffer.readerIndex(savedReaderIndex + is.position());
return result == Codec.NEED_MORE_INPUT ? DecodeResult.NEED_MORE_INPUT : result;
}
public Codec getCodec() {
return codec;
}
}