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/*
* Copyright 2015 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.net.SocketAddress;
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.traccar.BaseProtocolDecoder;
import org.traccar.model.Event;
import org.traccar.model.Position;
public class GpsMarkerProtocolDecoder extends BaseProtocolDecoder {
public GpsMarkerProtocolDecoder(GpsMarkerProtocol protocol) {
super(protocol);
}
private static final Pattern pattern = Pattern.compile(
"\\$GM" +
"\\d" + // Type
"(?:\\p{XDigit}{2})?" + // Index
"(\\d{15})" + // IMEI
"T(\\d{2})(\\d{2})(\\d{2})" + // Date
"(\\d{2})(\\d{2})(\\d{2})?" + // Time
"([NS])" +
"(\\d{2})(\\d{2}\\d{4})" + // Latitude
"([EW])" +
"(\\d{3})(\\d{2}\\d{4})" + // Longitude
"(\\d{3})" + // Speed
"(\\d{3})" + // Course
"(\\d)" + // Satellites
"(\\d{2})" + // Battery
"(\\d)" + // Input
"(\\d)" + // Output
"(\\d{3})" + // Temperature
".*");
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg)
throws Exception {
String sentence = (String) msg;
// Parse message
Matcher parser = pattern.matcher(sentence);
if (!parser.matches()) {
return null;
}
// Create new position
Position position = new Position();
position.setProtocol(getProtocolName());
Integer index = 1;
// Get device by IMEI
String imei = parser.group(index++);
if (!identify(imei, channel, remoteAddress)) {
return null;
}
position.setDeviceId(getDeviceId());
// Date and Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.DAY_OF_MONTH, Integer.parseInt(parser.group(index++)));
time.set(Calendar.MONTH, Integer.parseInt(parser.group(index++)) - 1);
time.set(Calendar.YEAR, 2000 + Integer.parseInt(parser.group(index++)));
time.set(Calendar.HOUR_OF_DAY, Integer.parseInt(parser.group(index++)));
time.set(Calendar.MINUTE, Integer.parseInt(parser.group(index++)));
String seconds = parser.group(index++);
if (seconds != null) {
time.set(Calendar.SECOND, Integer.parseInt(seconds));
}
position.setTime(time.getTime());
// Validity
position.setValid(true);
// Latitude
String hemisphere = parser.group(index++);
Double latitude = Double.parseDouble(parser.group(index++));
latitude += Double.parseDouble(parser.group(index++)) / 600000;
if (hemisphere.compareTo("S") == 0) {
latitude = -latitude;
}
position.setLatitude(latitude);
// Longitude
hemisphere = parser.group(index++);
Double longitude = Double.parseDouble(parser.group(index++));
longitude += Double.parseDouble(parser.group(index++)) / 600000;
if (hemisphere.compareTo("W") == 0) {
longitude = -longitude;
}
position.setLongitude(longitude);
// Speed
position.setSpeed(Double.parseDouble(parser.group(index++)));
// Course
position.setCourse(Double.parseDouble(parser.group(index++)));
// Additional data
position.set(Event.KEY_SATELLITES, parser.group(index++));
position.set(Event.KEY_BATTERY, parser.group(index++));
position.set(Event.KEY_INPUT, parser.group(index++));
position.set(Event.KEY_OUTPUT, parser.group(index++));
position.set(Event.PREFIX_TEMP + 1, parser.group(index++));
return position;
}
}
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