com.generallycloud.baseio.codec.linebased.LineBasedProtocolEncoder Maven / Gradle / Ivy

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/*
 * Copyright 2015-2017 GenerallyCloud.com
 *  
 * 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.generallycloud.baseio.codec.linebased;

import java.io.IOException;

import com.generallycloud.baseio.buffer.ByteBuf;
import com.generallycloud.baseio.buffer.ByteBufAllocator;
import com.generallycloud.baseio.codec.linebased.future.LineBasedReadFuture;
import com.generallycloud.baseio.component.ByteArrayBuffer;
import com.generallycloud.baseio.protocol.ChannelReadFuture;
import com.generallycloud.baseio.protocol.ChannelWriteFuture;
import com.generallycloud.baseio.protocol.ChannelWriteFutureImpl;
import com.generallycloud.baseio.protocol.ProtocolEncoder;

public class LineBasedProtocolEncoder implements ProtocolEncoder {

	@Override
	public ChannelWriteFuture encode(ByteBufAllocator allocator, ChannelReadFuture future) throws IOException {

		LineBasedReadFuture f = (LineBasedReadFuture) future;

		ByteArrayBuffer buffer = f.getWriteBuffer();

		if (buffer == null) {
			throw new IOException("null write buffer");
		}
		
		ByteBuf buf = allocator.allocate(buffer.size() + 1);

		buf.put(buffer.array(), 0, buffer.size());

		buf.putByte(LineBasedProtocolDecoder.LINE_BASE);

		return new ChannelWriteFutureImpl(future, buf.flip());
	}

}