com.owlplatform.solver.protocol.codec.SampleEncoder Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of owl-solver Show documentation

Network communication library for solver-aggregator connections.

The newest version!

/*
 * Owl Platform Solver-Aggregator Library for Java
 * Copyright (C) 2012 Robert Moore and the Owl Platform
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *  
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *  
 * You should have received a copy of the GNU Lesser General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package com.owlplatform.solver.protocol.codec;

import java.io.IOException;

import org.apache.mina.core.buffer.IoBuffer;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.ProtocolEncoderOutput;
import org.apache.mina.filter.codec.demux.MessageEncoder;

import com.owlplatform.common.SampleMessage;

/**
 * Encodes a {@code SampleMessage} according to the Solver-Aggregator protocol.
 * @author Robert Moore
 *
 */
public class SampleEncoder implements MessageEncoder {

	@Override
	public void encode(IoSession session, SampleMessage message,
			ProtocolEncoderOutput out) throws Exception {

		if (message.getLengthPrefixSolver() < 0) {
			throw new IOException("Message length is negative.");
		}
		
		IoBuffer buffer = IoBuffer.allocate(message.getLengthPrefixSolver()+4);
		
		buffer.putInt(message.getLengthPrefixSolver());
		buffer.put(SampleMessage.MESSAGE_TYPE);
		buffer.put(message.getPhysicalLayer());
		buffer.put(message.getDeviceId());
		buffer.put(message.getReceiverId());
		buffer.putLong(message.getReceiverTimeStamp());
		buffer.putFloat(message.getRssi());
		if (message.getSensedData() != null) {
			buffer.put(message.getSensedData());
		}
		buffer.flip();
		out.write(buffer);
		out.flush();
		buffer.free();
	}

}