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/*
* Copyright 2012 - 2014 Anton Tananaev (anton.tananaev@gmail.com)
*
* 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.helper.UnitsConverter;
import org.traccar.model.Event;
import org.traccar.model.Position;
public class Tk103ProtocolDecoder extends BaseProtocolDecoder {
public Tk103ProtocolDecoder(String protocol) {
super(protocol);
}
private static final Pattern pattern = Pattern.compile(
"(\\d+)(,)?" + // Device ID
".{4},?" + // Command
"\\d*" + // IMEI (?)
"(\\d{2})(\\d{2})(\\d{2}),?" + // Date (YYMMDD)
"([AV]),?" + // Validity
"(\\d{2})(\\d{2}\\.\\d+)" + // Latitude (DDMM.MMMM)
"([NS]),?" +
"(\\d{3})(\\d{2}\\.\\d+)" + // Longitude (DDDMM.MMMM)
"([EW]),?" +
"(\\d+\\.\\d)(?:\\d*,)?" + // Speed
"(\\d{2})(\\d{2})(\\d{2}),?" + // Time (HHMMSS)
"(\\d+\\.?\\d+),?" + // Course
"([0-9a-fA-F]{8})?,?" + // State
"(?:L([0-9a-fA-F]+))?\\)?"); // Odometer
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
String sentence = (String) msg;
// Find message start
int beginIndex = sentence.indexOf('(');
if (beginIndex != -1) {
sentence = sentence.substring(beginIndex + 1);
}
// Send response
if (channel != null) {
String id = sentence.substring(0, 12);
String type = sentence.substring(12, 16);
if (type.equals("BP00")) {
String content = sentence.substring(sentence.length() - 3);
channel.write("(" + id + "AP01" + content + ")");
} else if (type.equals("BP05")) {
channel.write("(" + id + "AP05)");
}
}
// 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 IMEI
if (!identify(parser.group(index++))) {
return null;
}
position.setDeviceId(getDeviceId());
// Date
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
if (parser.group(index++) == null) {
time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
} else {
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++)));
}
// 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
position.setSpeed(UnitsConverter.knotsFromKph(Double.valueOf(parser.group(index++))));
// Time
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++)));
position.setTime(time.getTime());
// Course
position.setCourse(Double.valueOf(parser.group(index++)));
// State
position.set(Event.KEY_STATUS, parser.group(index++));
// Odometer
String odometer = parser.group(index++);
if (odometer != null) {
position.set(Event.KEY_ODOMETER, Long.parseLong(odometer, 16));
}
return position;
}
}
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