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/*
* Copyright 2016 - 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.session.DeviceSession;
import org.traccar.Protocol;
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 GnxProtocolDecoder extends BaseProtocolDecoder {
public GnxProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN_LOCATION = new PatternBuilder()
.number("(d+),") // imei
.number("d+,") // length
.expression("([01]),") // history
.number("(dd)(dd)(dd),") // device time (hhmmss)
.number("(dd)(dd)(dd),") // device date (ddmmyy)
.number("(dd)(dd)(dd),") // fix time (hhmmss)
.number("(dd)(dd)(dd),") // fix date (ddmmyy)
.number("(d),") // valid
.number("(dd.d+),") // latitude
.expression("([NS]),")
.number("(ddd.d+),") // longitude
.expression("([EW]),")
.compile();
private static final Pattern PATTERN_MIF = new PatternBuilder()
.text("$GNX_MIF,")
.expression(PATTERN_LOCATION.pattern())
.expression("[01],") // valid card
.expression("([^,]+),") // rfid
.any()
.compile();
private static final Pattern PATTERN_OTHER = new PatternBuilder()
.text("$GNX_")
.expression("...,")
.expression(PATTERN_LOCATION.pattern())
.any()
.compile();
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
String type = sentence.substring(5, 8);
Pattern pattern;
if (type.equals("MIF")) {
pattern = PATTERN_MIF;
} else {
pattern = PATTERN_OTHER;
}
Parser parser = new Parser(pattern, sentence);
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());
if (parser.nextInt(0) == 1) {
position.set(Position.KEY_ARCHIVE, true);
}
position.setDeviceTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY, "GMT+5:30"));
position.setFixTime(parser.nextDateTime(Parser.DateTimeFormat.HMS_DMY, "GMT+5:30"));
position.setValid(parser.nextInt(0) != 0);
position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM));
if (type.equals("MIF")) {
position.set(Position.KEY_DRIVER_UNIQUE_ID, parser.next());
}
return position;
}
}
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