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/*
* Copyright 2013 - 2014 Anton Tananaev (anton.tananaev@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.BaseProtocolDecoder;
import org.traccar.ServerManager;
import org.traccar.helper.Log;
import org.traccar.model.ExtendedInfoFormatter;
import org.traccar.model.Position;
public class WialonProtocolDecoder extends BaseProtocolDecoder {
private Long deviceId;
public WialonProtocolDecoder(ServerManager serverManager) {
super(serverManager);
}
private static final Pattern pattern = Pattern.compile(
"#S?D#" +
"(\\d{2})(\\d{2})(\\d{2});" + // Date (DDMMYY)
"(\\d{2})(\\d{2})(\\d{2});" + // Time (HHMMSS)
"(\\d{2})(\\d{2}\\.\\d+);" + // Latitude (DDMM.MMMM)
"([NS]);" +
"(\\d{3})(\\d{2}\\.\\d+);" + // Longitude (DDDMM.MMMM)
"([EW]);" +
"(\\d+\\.?\\d*);" + // Speed
"(\\d+\\.?\\d*);" + // Course
"(\\d+\\.?\\d*);" + // Altitude
"(\\d+)" + // Satellites
".*"); // Full format
private void sendResponse(Channel channel, String prefix, Integer number) {
if (channel != null) {
StringBuilder response = new StringBuilder(prefix);
if (number != null) {
response.append(number);
}
response.append("\r\n");
channel.write(response.toString());
}
}
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
String sentence = (String) msg;
// Detect device ID
if (sentence.startsWith("#L#")) {
String imei = sentence.substring(3, sentence.indexOf(';'));
try {
deviceId = getDataManager().getDeviceByImei(imei).getId();
sendResponse(channel, "#AL#", 1);
} catch(Exception error) {
Log.warning("Unknown device - " + imei);
}
}
// Heartbeat
else if (sentence.startsWith("#P#")) {
sendResponse(channel, "#AP#", null);
}
// Parse message
else if ((sentence.startsWith("#SD#") || sentence.startsWith("#D#")) && deviceId != null) {
// Parse message
Matcher parser = pattern.matcher(sentence);
if (!parser.matches()) {
return null;
}
// Create new position
Position position = new Position();
ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter("wialon");
position.setDeviceId(deviceId);
Integer index = 1;
// Date and Time
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.set(Calendar.HOUR_OF_DAY, 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());
// Latitude
Double latitude = Double.valueOf(parser.group(index++));
latitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
position.setLatitude(latitude);
// Longitude
Double longitude = Double.valueOf(parser.group(index++));
longitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("W") == 0) longitude = -longitude;
position.setLongitude(longitude);
// Speed
position.setSpeed(Double.valueOf(parser.group(index++)) * 0.539957);
// Course
position.setCourse(Double.valueOf(parser.group(index++)));
// Altitude
position.setAltitude(Double.valueOf(parser.group(index++)));
// Satellites
int satellites = Integer.valueOf(parser.group(index++));
position.setValid(satellites >= 3);
extendedInfo.set("satellites", satellites);
// Extended info
position.setExtendedInfo(extendedInfo.toString());
// Send response
sendResponse(channel, "#AD#", 1);
return position;
}
return null;
}
}
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