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/*
* Copyright 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.Protocol;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.regex.Pattern;
public class ItsProtocolDecoder extends BaseProtocolDecoder {
public ItsProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.text("$,")
.expression("[^,]+,") // event
.groupBegin()
.expression("[^,]+,") // vendor
.expression("[^,]+,") // firmware version
.groupEnd("?")
.expression("[^,]+,") // type
.groupBegin()
.number("d+,")
.expression("[LH],") // history
.groupEnd("?")
.number("(d{15}),") // imei
.groupBegin()
.expression("(?:NM|SP),") // status
.or()
.expression("[^,]+,") // vehicle registration
.number("([01]),") // valid
.groupEnd()
.number("(dd),?(dd),?(dddd),") // date (ddmmyyyy)
.number("(dd),?(dd),?(dd),") // time (hhmmss)
.expression("([AV]),").optional() // valid
.number("(d+.d+),([NS]),") // latitude
.number("(d+.d+),([EW]),") // longitude
.number("(-?d+.d+),").optional() // altitude
.number("(d+.d+),") // speed
.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;
}
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
if (parser.hasNext()) {
position.setValid(parser.nextInt() == 1);
}
position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
if (parser.hasNext()) {
position.setValid(parser.next().equals("A"));
}
position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
position.setAltitude(parser.nextDouble(0));
position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble()));
return position;
}
}
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