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/*
* Copyright 2015 - 2018 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 io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.Date;
import java.util.regex.Pattern;
public class GpsmtaProtocolDecoder extends BaseProtocolDecoder {
public GpsmtaProtocolDecoder(GpsmtaProtocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.expression("([^ ]+) ") // uid
.number("(d+) ") // time (unix time)
.number("(-?d+.d+) ") // latitude
.number("(-?d+.d+) ") // longitude
.number("(d+) ") // speed
.number("(d+) ") // course
.number("(d+) ") // accuracy
.number("(d+) ") // altitude
.number("(d+) ") // flags
.number("(d+) ") // battery
.number("(d+) ") // temperature
.number("(d)") // charging status
.any()
.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());
String time = parser.next();
position.setTime(new Date(Long.parseLong(time) * 1000));
position.setLatitude(parser.nextDouble(0));
position.setLongitude(parser.nextDouble(0));
position.setSpeed(parser.nextInt(0));
position.setCourse(parser.nextInt(0));
position.setAccuracy(parser.nextInt(0));
position.setAltitude(parser.nextInt(0));
position.set(Position.KEY_STATUS, parser.nextInt(0));
position.set(Position.KEY_BATTERY, parser.nextInt(0));
position.set(Position.PREFIX_TEMP + 1, parser.nextInt(0));
position.set(Position.KEY_CHARGE, parser.nextInt(0) == 1);
if (channel != null) {
channel.writeAndFlush(new NetworkMessage(time, remoteAddress));
}
return position;
}
}
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