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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.helper.DateBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.Date;
public class FreematicsProtocolDecoder extends BaseProtocolDecoder {
public FreematicsProtocolDecoder(FreematicsProtocol protocol) {
super(protocol);
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
String sentence = (String) msg;
int startIndex = sentence.indexOf('#');
int endIndex = sentence.indexOf('*');
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, sentence.substring(0, startIndex));
if (deviceSession == null) {
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setValid(true);
DateBuilder dateBuilder = new DateBuilder(new Date());
for (String pair : sentence.substring(startIndex + 1, endIndex).split(",")) {
String[] data = pair.split("=");
int key = Integer.parseInt(data[0], 16);
String value = data[1];
switch (key) {
case 0x11:
value = ("000000" + value).substring(value.length());
dateBuilder.setDateReverse(
Integer.parseInt(value.substring(0, 2)),
Integer.parseInt(value.substring(2, 4)),
Integer.parseInt(value.substring(4)));
break;
case 0x10:
value = ("00000000" + value).substring(value.length());
dateBuilder.setTime(
Integer.parseInt(value.substring(0, 2)),
Integer.parseInt(value.substring(2, 4)),
Integer.parseInt(value.substring(4, 6)),
Integer.parseInt(value.substring(6)) * 10);
break;
case 0xA:
position.setLatitude(Double.parseDouble(value));
break;
case 0xB:
position.setLongitude(Double.parseDouble(value));
break;
case 0xC:
position.setAltitude(Integer.parseInt(value));
break;
case 0xD:
position.setLatitude(UnitsConverter.knotsFromKph(Integer.parseInt(value)));
break;
case 0xE:
position.setCourse(Integer.parseInt(value));
break;
case 0xF:
position.set(Position.KEY_SATELLITES, Integer.parseInt(value));
break;
default:
position.set(data[0], value);
break;
}
}
position.setTime(dateBuilder.getDate());
return position;
}
}
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