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/*
* Copyright 2017 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 org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
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 T57ProtocolDecoder extends BaseProtocolDecoder {
public T57ProtocolDecoder(T57Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = new PatternBuilder()
.text("*T57#")
.number("Fd#") // type
.number("([^#]+)#") // device id
.number("(dd)(dd)(dd)#") // date (ddmmyy)
.number("(dd)(dd)(dd)#") // time (hhmmss)
.number("(dd)(dd.d+)#") // latitude
.expression("([NS])#")
.number("(ddd)(dd.d+)#") // longitude
.expression("([EW])#")
.expression("[^#]+#")
.number("(d+.d+)#") // speed
.number("(d+.d+)#") // altitude
.expression("([AV])") // valid
.number("d#") // fix type
.number("(d+.d+)#") // battery
.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());
position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
position.setLatitude(parser.nextCoordinate());
position.setLongitude(parser.nextCoordinate());
position.setSpeed(parser.nextDouble());
position.setAltitude(parser.nextDouble());
position.setValid(parser.next().equals("A"));
position.set(Position.KEY_BATTERY, parser.nextDouble());
return position;
}
}
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