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/*
* Copyright 2013 - 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.model.Position;
public class GotopProtocolDecoder extends BaseProtocolDecoder {
public GotopProtocolDecoder(String protocol) {
super(protocol);
}
private static final Pattern pattern = Pattern.compile(
"(\\d+)," + // IMEI
"[^,]+," + // Type
"([AV])," + // Validity
"DATE:(\\d{2})(\\d{2})(\\d{2})," + // Date (YYMMDD)
"TIME:(\\d{2})(\\d{2})(\\d{2})," + // Time (HHMMSS)
"LAT:(\\d+.\\d+)([NS])," + // Latitude
"LOT:(\\d+.\\d+)([EW])," + // Longitude
"Speed:(\\d+.\\d+)," + // Speed
"([^,]+)," + // Status
"(\\d+)?" + // Course
".*");
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
// Parse message
String sentence = (String) msg;
Matcher parser = pattern.matcher(sentence);
if (sentence.isEmpty() || !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());
// Validity
position.setValid(parser.group(index++).compareTo("A") == 0);
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
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++)));
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());
// Latitude
Double latitude = Double.valueOf(parser.group(index++));
if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
position.setLatitude(latitude);
// Longitude
Double longitude = Double.valueOf(parser.group(index++));
if (parser.group(index++).compareTo("W") == 0) longitude = -longitude;
position.setLongitude(longitude);
// Speed
position.setSpeed(Double.valueOf(parser.group(index++)) * 0.539957);
// Status
position.set("status", parser.group(index++));
// Course
String course = parser.group(index++);
if (course != null) {
position.setCourse(Double.valueOf(course));
}
return position;
}
}
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