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/*
* Copyright 2013 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.LinkedList;
import java.util.List;
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 Tlt2hProtocolDecoder extends BaseProtocolDecoder {
public Tlt2hProtocolDecoder(Tlt2hProtocol protocol) {
super(protocol);
}
private static final Pattern PATTERN_HEADER = Pattern.compile(
"#(\\d+)#" + // IMEI
"[^#]+#" +
"\\d+#" +
"([^#]+)#" + // Status
"\\d+"); // Number of records
private static final Pattern PATTERN_POSITION = Pattern.compile(
"#([0-9a-f]+)?" + // Cell info
"\\$GPRMC," +
"(\\d{2})(\\d{2})(\\d{2})\\.(\\d+)," + // Time (HHMMSS.SSS)
"([AV])," + // Validity
"(\\d+)(\\d{2}\\.\\d+)," + // Latitude (DDMM.MMMM)
"([NS])," +
"(\\d+)(\\d{2}\\.\\d+)," + // Longitude (DDDMM.MMMM)
"([EW])," +
"(\\d+\\.\\d+)?," + // Speed
"(\\d+\\.\\d+)?," + // Course
"(\\d{2})(\\d{2})(\\d{2})" + // Date (DDMMYY)
".+"); // Other (Checksumm)
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg)
throws Exception {
String sentence = (String) msg;
sentence = sentence.trim();
// Decode header
String header = sentence.substring(0, sentence.indexOf('\r'));
Matcher parser = PATTERN_HEADER.matcher(header);
if (!parser.matches()) {
return null;
}
// Get device identifier
if (!identify(parser.group(1), channel)) {
return null;
}
// Get status
String status = parser.group(2);
String[] messages = sentence.substring(sentence.indexOf('\n') + 1).split("\r\n");
List<Position> positions = new LinkedList<>();
for (String message : messages) {
parser = PATTERN_POSITION.matcher(message);
if (parser.matches()) {
Position position = new Position();
position.setProtocol(getProtocolName());
position.setDeviceId(getDeviceId());
Integer index = 1;
// Cell
position.set(Event.KEY_CELL, parser.group(index++));
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.HOUR_OF_DAY, Integer.parseInt(parser.group(index++)));
time.set(Calendar.MINUTE, Integer.parseInt(parser.group(index++)));
time.set(Calendar.SECOND, Integer.parseInt(parser.group(index++)));
index += 1; // Skip milliseconds
// Validity
position.setValid(parser.group(index++).compareTo("A") == 0);
// Latitude
Double latitude = Double.parseDouble(parser.group(index++));
latitude += Double.parseDouble(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
position.setLatitude(latitude);
// Longitude
Double longitude = Double.parseDouble(parser.group(index++));
longitude += Double.parseDouble(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("W") == 0) longitude = -longitude;
position.setLongitude(longitude);
// Speed
String speed = parser.group(index++);
if (speed != null) {
position.setSpeed(Double.parseDouble(speed));
}
// Course
String course = parser.group(index++);
if (course != null) {
position.setCourse(Double.parseDouble(course));
}
// Date
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++)));
position.setTime(time.getTime());
// Status
position.set(Event.KEY_STATUS, status);
positions.add(position);
}
}
return positions;
}
}
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