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/*
* Copyright 2014 - 2018 Anton Tananaev (anton@traccar.org)
* Copyright 2014 Rohit
*
* 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 io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.Protocol;
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.regex.Pattern;
public class CarTrackProtocolDecoder extends BaseProtocolDecoder {
public CarTrackProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.text("$$") // header
.number("(d+)") // device id
.text("?").expression("*")
.text("&A")
.number("(dddd)") // command
.text("&B")
.number("(dd)(dd)(dd).(ddd),") // time (hhmmss.sss)
.expression("([AV]),") // validity
.number("(dd)(dd.dddd),") // latitude
.expression("([NS]),")
.number("(ddd)(dd.dddd),") // longitude
.expression("([EW]),")
.number("(d+.d*)?,") // speed
.number("(d+.d*)?,") // course
.number("(dd)(dd)(dd)") // date (ddmmyy)
.any()
.expression("&C([^&]*)") // io
.expression("&D([^&]*)") // odometer
.expression("&E([^&]*)") // alarm
.expression("&Y([^&]*)").optional() // adc
.compile();
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
Parser parser = new Parser(PATTERN, (String) msg);
if (!parser.matches()) {
return null;
}
Position position = new Position(getProtocolName());
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
if (deviceSession == null) {
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
position.set(Position.KEY_COMMAND, parser.next());
DateBuilder dateBuilder = new DateBuilder()
.setTime(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
position.setValid(parser.next().equals("A"));
position.setLatitude(parser.nextCoordinate());
position.setLongitude(parser.nextCoordinate());
position.setSpeed(parser.nextDouble(0));
position.setCourse(parser.nextDouble(0));
dateBuilder.setDateReverse(parser.nextInt(0), parser.nextInt(0), parser.nextInt(0));
position.setTime(dateBuilder.getDate());
position.set(Position.PREFIX_IO + 1, parser.next());
String odometer = parser.next();
odometer = odometer.replace(":", "A");
odometer = odometer.replace(";", "B");
odometer = odometer.replace("<", "C");
odometer = odometer.replace("=", "D");
odometer = odometer.replace(">", "E");
odometer = odometer.replace("?", "F");
position.set(Position.KEY_ODOMETER, Integer.parseInt(odometer, 16));
parser.next(); // there is no meaningful alarms
position.set(Position.PREFIX_ADC + 1, parser.next());
return position;
}
}
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