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/*
* Copyright 2014 Anton Tananaev (anton.tananaev@gmail.com)
* Rohit
*
* 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 java.util.Calendar;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.traccar.BaseProtocolDecoder;
import org.traccar.model.Position;
public class CarTrackProtocolDecoder extends BaseProtocolDecoder {
public CarTrackProtocolDecoder(String protocol) {
super(protocol);
}
private static final Pattern pattern = Pattern.compile(
"\\$\\$" + // Header
"(\\d+)\\?*" + // Device ID
"\\&A" +
"(\\d{4})" + // Command - 2
"\\&B" +
"(\\d{2})(\\d{2})(\\d{2})\\.(\\d{3})," + // HHMMSS.DDD
"([AV])," + // STATUS : A= Valid, V = Invalid
"(\\d{2})(\\d{2}\\.\\d{4})," + // Lat : XXMM.DDDDD
"([NS])," + // N/S
"(\\d{3})(\\d{2}\\.\\d{4})," + // Long : YYYMM.DDDD
"([EW])," + // E/W
"(\\d+.\\d*)?," + // Speed in Knots
"(\\d+.\\d*)?," + // Heading
"(\\d{2})(\\d{2})(\\d{2})" + // DDMMYY
".*" +
"\\&C(.*)" + // IO Port Data
"\\&D(.*)" + // Mile Meter Data
"\\&E(.*)" + // Alarm Data
"(?:\\&Y)?(.*)"); // AD Input Data
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
String sentence = (String) msg;
// Parse message
Matcher parser = pattern.matcher(sentence);
if (!parser.matches()) {
return null;
}
// Create new position
Position position = new Position();
position.setProtocol(getProtocol());
Integer index = 1;
// Get device by unique identifier
if (!identify(parser.group(index++))) {
return null;
}
position.setDeviceId(getDeviceId());
// Command
position.set("command", parser.group(index++));
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.HOUR_OF_DAY, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++)));
time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MILLISECOND, Integer.valueOf(parser.group(index++)));
// Validity
position.setValid(parser.group(index++).compareTo("A") == 0);
// Latitude
Double latitude = Double.valueOf(parser.group(index++));
latitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
position.setLatitude(latitude);
// Longitude
Double longitude = Double.valueOf(parser.group(index++));
longitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("W") == 0) longitude = -longitude;
position.setLongitude(longitude);
// Speed
String speed = parser.group(index++);
if (speed != null) {
position.setSpeed(Double.valueOf(speed));
}
// Course
String course = parser.group(index++);
if (course != null) {
position.setCourse(Double.valueOf(course));
}
// Date
time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
position.setTime(time.getTime());
// State
position.set("io", parser.group(index++));
/* Start : Added By Rohit Singhal, Decode Milage Data*/
// Prepare Mile Meter Data
String milage = parser.group(index++);
milage = milage.replace(":", "A");
milage = milage.replace(";", "B");
milage = milage.replace("<", "C");
milage = milage.replace("=", "D");
milage = milage.replace(">", "E");
milage = milage.replace("?", "F");
position.set("milage", Integer.parseInt(milage, 16));
/* Commented By Rohit position.set("milage", parser.group(index++)); */
/*End : Added By Rohit Singhal, Decode Milage Data*/
position.set("alarm", parser.group(index++));
position.set("ad", parser.group(index++));
return position;
}
}
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