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ICAP Codec implementation for JBoss Netty

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/*******************************************************************************
 * Copyright (c) 2012 Michael Mimo Moratti.
 *  
 * Michael Mimo Moratti 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 ch.mimo.netty.handler.codec.icap;

import org.jboss.netty.buffer.ChannelBuffer;

/**
 * Encodes an ICAP Request which takes an @see {@link IcapRequest} or @see {@link IcapChunk} to encode.
 * 
 * @author Michael Mimo Moratti ([email protected])
 *
 */
public class IcapRequestEncoder extends IcapMessageEncoder {

	public IcapRequestEncoder() {
		super();
	}
	
	@Override
	protected int encodeInitialLine(ChannelBuffer buffer, IcapMessage message) throws Exception {
		IcapRequest request = (IcapRequest) message;
		int index = buffer.readableBytes();
        buffer.writeBytes(request.getMethod().toString().getBytes(IcapCodecUtil.ASCII_CHARSET));
        buffer.writeByte(IcapCodecUtil.SPACE);
        buffer.writeBytes(request.getUri().getBytes(IcapCodecUtil.ASCII_CHARSET));
        buffer.writeByte(IcapCodecUtil.SPACE);
        buffer.writeBytes(request.getProtocolVersion().toString().getBytes(IcapCodecUtil.ASCII_CHARSET));
        buffer.writeBytes(IcapCodecUtil.CRLF);
        return buffer.readableBytes() - index;
	}

}