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/*
* Copyright 2012 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.GenericProtocolDecoder;
import org.traccar.model.DataManager;
import org.traccar.model.Position;
/**
* GL200 tracker protocol decoder
*/
public class Gl200ProtocolDecoder extends GenericProtocolDecoder {
/**
* Initialize
*/
public Gl200ProtocolDecoder(DataManager dataManager) {
super(dataManager);
}
/**
* Regular expressions pattern
*/
static private Pattern pattern = Pattern.compile(
"\\+RESP:GT...," +
"[0-9a-fA-F]{6}," + // Protocol version
"(\\d{15})," + // IMEI
"[^,]*," + // Device name
"(?:(?:\\d," + // Report ID / Geo mode
"\\d*," + // Report type / Geo radius
"\\d*)|" + // Number / Geo check interval
"(?:[^,]*))," + // Call number
"(\\d*)," + // GPS accuracy
"(\\d+.\\d)," + // Speed
"(\\d+)," + // Course
"(-?\\d+.\\d)," + // Altitude
"(-?\\d+.\\d+)," + // Longitude
"(-?\\d+.\\d+)," + // Latitude
"(\\d{4})(\\d{2})(\\d{2})" + // Date (YYYYMMDD)
"(\\d{2})(\\d{2})(\\d{2})," + // Time (HHMMSS)
".*");
/**
* Decode message
*/
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();
Integer index = 1;
// Get device by IMEI
String imei = parser.group(index++);
position.setDeviceId(getDataManager().getDeviceByImei(imei).getId());
// Validity
position.setValid(Integer.valueOf(parser.group(index++)) == 0 ? false : true);
// Position info
position.setSpeed(Double.valueOf(parser.group(index++)));
position.setCourse(Double.valueOf(parser.group(index++)));
position.setAltitude(Double.valueOf(parser.group(index++)));
position.setLongitude(Double.valueOf(parser.group(index++)));
position.setLatitude(Double.valueOf(parser.group(index++)));
// Date
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.YEAR, 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++)));
// Time
time.set(Calendar.HOUR, 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;
}
}
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