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/*
* Copyright 2013 Anton Tananaev (anton@traccar.org)
*
* 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 org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.LinkedList;
import java.util.List;
import java.util.regex.Pattern;
public class Tlt2hProtocolDecoder extends BaseProtocolDecoder {
public Tlt2hProtocolDecoder(Tlt2hProtocol protocol) {
super(protocol);
}
private static final Pattern PATTERN_HEADER = new PatternBuilder()
.number("#(d+)#") // imei
.expression("[^#]*#")
.number("d+#")
.expression("([^#]+)#") // status
.number("d+") // number of records
.compile();
private static final Pattern PATTERN_POSITION = new PatternBuilder()
.number("#(x+)?") // cell info
.text("$GPRMC,")
.number("(dd)(dd)(dd).(ddd),") // time (hhmmss)
.expression("([AV]),") // validity
.number("(d+)(dd.d+),") // latitude
.expression("([NS]),")
.number("(d+)(dd.d+),") // longitude
.number("([EW]),")
.number("(d+.?d*)?,") // speed
.number("(d+.?d*)?,") // course
.number("(dd)(dd)(dd)") // date (ddmmyy)
.any()
.compile();
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
sentence = sentence.trim();
String header = sentence.substring(0, sentence.indexOf('\r'));
Parser parser = new Parser(PATTERN_HEADER, header);
if (!parser.matches()) {
return null;
}
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
if (deviceSession == null) {
return null;
}
String status = parser.next();
String[] messages = sentence.substring(sentence.indexOf('\n') + 1).split("\r\n");
List<Position> positions = new LinkedList<>();
for (String message : messages) {
parser = new Parser(PATTERN_POSITION, message);
if (parser.matches()) {
Position position = new Position();
position.setProtocol(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
parser.next(); // base station info
DateBuilder dateBuilder = new DateBuilder()
.setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
parser.next();
position.setValid(parser.next().equals("A"));
position.setLatitude(parser.nextCoordinate());
position.setLongitude(parser.nextCoordinate());
position.setSpeed(parser.nextDouble());
position.setCourse(parser.nextDouble());
dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
position.setTime(dateBuilder.getDate());
position.set(Position.KEY_STATUS, status);
positions.add(position);
}
}
return positions;
}
}
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