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/*
* Copyright 2012 - 2013 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.model.Event;
import org.traccar.model.Position;
public class V680ProtocolDecoder extends BaseProtocolDecoder {
public V680ProtocolDecoder(String protocol) {
super(protocol);
}
private static final Pattern pattern = Pattern.compile(
"(?:#(\\d+)#" + // IMEI
"([^#]*)#)?" + // User
"(\\d+)#" + // Fix
"([^#]+)#" + // Password
"([^#]+)#" + // Event
"(\\d+)#" + // Packet number
"([^#]+)?#?" + // GSM base station
"(?:[^#]+#)?" +
"(\\d+)?(\\d{2}\\.\\d+)," + // Longitude (DDDMM.MMMM)
"([EW])," +
"(\\d+)?(\\d{2}\\.\\d+)," + // Latitude (DDMM.MMMM)
"([NS])," +
"(\\d+\\.\\d+)," + // Speed
"(\\d+\\.?\\d*)?#" + // Course
"(\\d{2})(\\d{2})(\\d{2})#" + // Date (DDMMYY)
"(\\d{2})(\\d{2})(\\d{2})" + // Time (HHMMSS)
".*");
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
String sentence = (String) msg;
sentence = sentence.trim();
// Detect device ID
if (sentence.length() == 16) {
String imei = sentence.substring(1, sentence.length());
identify(imei);
} else {
// 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
String imei = parser.group(index++);
if (imei != null) {
identify(imei);
}
if (!hasDeviceId()) {
return null;
}
position.setDeviceId(getDeviceId());
// User
position.set("user", parser.group(index++));
// Validity
position.setValid(Integer.valueOf(parser.group(index++)) > 0);
// Password
position.set("password", parser.group(index++));
// Event
position.set(Event.KEY_EVENT, parser.group(index++));
// Packet number
position.set("packet", parser.group(index++));
// GSM base station
position.set(Event.KEY_GSM, parser.group(index++));
// Longitude
String lon = parser.group(index++);
Double longitude = (lon != null) ? Double.valueOf(lon) : 0.0;
longitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("W") == 0) longitude = -longitude;
position.setLongitude(longitude);
// Latitude
String lat = parser.group(index++);
Double latitude = (lat != null) ? Double.valueOf(lat) : 0.0;
latitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
position.setLatitude(latitude);
// Speed and Course
position.setSpeed(Double.valueOf(parser.group(index++)));
String course = parser.group(index++);
if (course != null) {
position.setCourse(Double.valueOf(course));
}
// Date
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
int day = Integer.valueOf(parser.group(index++));
int month = Integer.valueOf(parser.group(index++));
if (day == 0 && month == 0) {
return null; // invalid date
}
time.set(Calendar.DAY_OF_MONTH, day);
time.set(Calendar.MONTH, month - 1);
time.set(Calendar.YEAR, 2000 + Integer.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());
return position;
}
return null;
}
}
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