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/*
* Copyright 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.Position;
public class EasyTrackProtocolDecoder extends BaseProtocolDecoder {
public EasyTrackProtocolDecoder(String protocol) {
super(protocol);
}
static private Pattern pattern = Pattern.compile(
"\\*..," + // Manufacturer
"(\\d+)," + // IMEI
"([^,]{2})," + // Command
"([AV])," + // Validity
"(\\p{XDigit}{2})" + // Year
"(\\p{XDigit}{2})" + // Month
"(\\p{XDigit}{2})," + // Day
"(\\p{XDigit}{2})" + // Hours
"(\\p{XDigit}{2})" + // Minutes
"(\\p{XDigit}{2})," + // Seconds
"(\\p{XDigit})" +
"(\\p{XDigit}{7})," + // Latitude
"(\\p{XDigit})" +
"(\\p{XDigit}{7})," + // Longitude
"(\\p{XDigit}{4})," + // Speed
"(\\p{XDigit}{4})," + // Course
"(\\p{XDigit}{8})," + // Status
"(\\p{XDigit}+)," + // Signal
"(\\d+)," + // Power
"(\\p{XDigit}{4})," + // Oil
"(\\p{XDigit}+),?" + // Milage
"(\\d+)?" + // Altitude
".*");
@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 IMEI
if (!identify(parser.group(index++))) {
return null;
}
position.setDeviceId(getDeviceId());
// Command
position.set("command", parser.group(index++));
// Validity
position.setValid(parser.group(index++).compareTo("A") == 0);
// Date
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.YEAR, 2000 + Integer.parseInt(parser.group(index++), 16));
time.set(Calendar.MONTH, Integer.parseInt(parser.group(index++), 16) - 1);
time.set(Calendar.DAY_OF_MONTH, Integer.parseInt(parser.group(index++), 16));
time.set(Calendar.HOUR_OF_DAY, Integer.parseInt(parser.group(index++), 16));
time.set(Calendar.MINUTE, Integer.parseInt(parser.group(index++), 16));
time.set(Calendar.SECOND, Integer.parseInt(parser.group(index++), 16));
position.setTime(time.getTime());
// Location
int hemisphere = parser.group(index++).equals("8") ? -1 : 1;
position.setLatitude(
hemisphere * Integer.parseInt(parser.group(index++), 16) / 600000.0);
hemisphere = parser.group(index++).equals("8") ? -1 : 1;
position.setLongitude(
hemisphere * Integer.parseInt(parser.group(index++), 16) / 600000.0);
position.setSpeed(Integer.parseInt(parser.group(index++), 16) / 100.0);
position.setCourse(Integer.parseInt(parser.group(index++), 16) / 100.0);
// Status
position.set("status", parser.group(index++));
// Signal
position.set("signal", parser.group(index++));
// Power
position.set("power", Double.valueOf(parser.group(index++)));
// Oil
position.set("oil", Integer.parseInt(parser.group(index++), 16));
// Milage
position.set("milage", Integer.parseInt(parser.group(index++), 16));
// Altitude
String altitude = parser.group(index++);
if (altitude != null) {
position.setAltitude(Double.valueOf(altitude));
}
return position;
}
}
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