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/*
* Copyright 2012 Anton Tananaev (anton.tananaev@gmail.com)
* Luis Parada (luis.parada@gmail.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 org.traccar.protocol;
import java.util.Calendar;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.traccar.GenericProtocolDecoder;
import org.traccar.model.DataManager;
import org.traccar.model.Position;
/**
* Ev603 Protocol Decoder
*/
public class Ev603ProtocolDecoder extends GenericProtocolDecoder{
/**
* Device ID
*/
private Long deviceId;
/**
* Initialize
*/
public Ev603ProtocolDecoder(DataManager dataManager) {
super(dataManager);
}
/**
* Regular expressions pattern
*/
static private Pattern pattern = Pattern.compile(
"!A," + // Type
"(\\d{2})\\/(\\d{2})\\/(\\d{2})," + // Date dd/mm/YY
"(\\d{2}):(\\d{2}):(\\d{2})," + // Time hh:mm:ss
"(-?\\d+\\.\\d+)," + // Latitude (DDMM.MMMM)
"(-?\\d+\\.\\d+)," + // Longitude (DDDMM.MMMM)
"(\\d+\\.\\d+)," + // Speed
"(\\d+\\.?\\d+)," + // Course
".*");
/**
* Decode message
*/
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
String sentence = (String) msg;
// Detect device ID
if (sentence.startsWith("!1,")) {
String imei = sentence.substring(3);
deviceId = getDataManager().getDeviceByImei(imei).getId();
}
else if (sentence.startsWith("!A,")) {
// Parse message
Matcher parser = pattern.matcher(sentence);
if (!parser.matches()) {
return null;
}
// Create new position
Position position = new Position();
position.setDeviceId(deviceId);
StringBuilder extendedInfo = new StringBuilder("<protocol>ev603</protocol>");
Integer index = 1;
// Date
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
// Time
time.set(Calendar.HOUR, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++)));
time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++)));
position.setTime(time.getTime());
// Validity
position.setValid(true);
// Coordinates
position.setLatitude(Double.valueOf(parser.group(index++)));
position.setLongitude(Double.valueOf(parser.group(index++)));
// Altitude
position.setAltitude(0.0);
// Speed
position.setSpeed(Double.valueOf(parser.group(index++)));
// Course
position.setCourse(Double.valueOf(parser.group(index++)));
// Extended info
position.setExtendedInfo(extendedInfo.toString());
return position;
}
return null;
}
}
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