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/*
* Copyright 2014 - 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.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 BoxProtocolDecoder extends BaseProtocolDecoder {
public BoxProtocolDecoder(Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.text("L,")
.number("(dd)(dd)(dd)") // date (yymmdd)
.number("(dd)(dd)(dd),") // time (hhmmss)
.text("G,")
.number("(-?d+.d+),") // latitude
.number("(-?d+.d+),") // longitude
.number("(d+.?d*),") // speed
.number("(d+.?d*),") // course
.number("(d+.?d*),") // distance
.number("(d+),") // event
.number("(d+)") // status
.any()
.compile();
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
if (sentence.startsWith("H,")) {
int index = sentence.indexOf(',', 2) + 1;
String id = sentence.substring(index, sentence.indexOf(',', index));
getDeviceSession(channel, remoteAddress, id);
} else if (sentence.startsWith("E,")) {
if (channel != null) {
channel.writeAndFlush(new NetworkMessage("A," + sentence.substring(2) + "\r", remoteAddress));
}
} else if (sentence.startsWith("L,")) {
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress);
if (deviceSession == null) {
return null;
}
Parser parser = new Parser(PATTERN, sentence);
if (!parser.matches()) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setTime(parser.nextDateTime());
position.setLatitude(parser.nextDouble(0));
position.setLongitude(parser.nextDouble(0));
position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0)));
position.setCourse(parser.nextDouble(0));
position.set(Position.KEY_ODOMETER_TRIP, parser.nextDouble(0) * 1000);
position.set(Position.KEY_EVENT, parser.next());
int status = parser.nextInt(0);
position.setValid((status & 0x04) == 0);
position.set(Position.KEY_STATUS, status);
return position;
}
return null;
}
}
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