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/*
* Copyright 2015 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.net.SocketAddress;
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.traccar.BaseProtocolDecoder;
import org.traccar.model.Event;
import org.traccar.model.Position;
public class Tr900ProtocolDecoder extends BaseProtocolDecoder {
public Tr900ProtocolDecoder(Tr900Protocol protocol) {
super(protocol);
}
private static final Pattern PATTERN = Pattern.compile(
">(\\d+)," + // ID
"\\d+," + // Period
"(\\d)," + // Fix
"(\\d{2})(\\d{2})(\\d{2})," + // Date (YYMMDD)
"(\\d{2})(\\d{2})(\\d{2})," + // Time (HHMMSS)
"([EW])" +
"(\\d{3})(\\d{2}\\.\\d+)," + // Longitude (DDDMM.MMMM)
"([NS])" +
"(\\d{2})(\\d{2}\\.\\d+)," + // Latitude (DDMM.MMMM)
"[^,]*," + // Command
"(\\d+\\.?\\d*)," + // Speed
"(\\d+\\.?\\d*)," + // Course
"(\\d+)," + // GSM
"(\\d+)," + // Event
"(\\d+)-" + // ADC
"(\\d+)," + // Battery
"\\d+," + // Impulses
"(\\d+)," + // Input
"(\\d+)" + // Status
".*(?:\r\n)?");
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, 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(getProtocolName());
Integer index = 1;
// Identification
if (!identify(parser.group(index++), channel, remoteAddress)) {
return null;
}
position.setDeviceId(getDeviceId());
// Validity
position.setValid(parser.group(index++).compareTo("1") == 0);
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.YEAR, 2000 + Integer.parseInt(parser.group(index++)));
time.set(Calendar.MONTH, Integer.parseInt(parser.group(index++)) - 1);
time.set(Calendar.DAY_OF_MONTH, Integer.parseInt(parser.group(index++)));
time.set(Calendar.HOUR_OF_DAY, Integer.parseInt(parser.group(index++)));
time.set(Calendar.MINUTE, Integer.parseInt(parser.group(index++)));
time.set(Calendar.SECOND, Integer.parseInt(parser.group(index++)));
position.setTime(time.getTime());
// Longitude
String hemisphere = parser.group(index++);
Double longitude = Double.parseDouble(parser.group(index++));
longitude += Double.parseDouble(parser.group(index++)) / 60;
if (hemisphere.compareTo("W") == 0) longitude = -longitude;
position.setLongitude(longitude);
// Latitude
hemisphere = parser.group(index++);
Double latitude = Double.parseDouble(parser.group(index++));
latitude += Double.parseDouble(parser.group(index++)) / 60;
if (hemisphere.compareTo("S") == 0) latitude = -latitude;
position.setLatitude(latitude);
// Speed
position.setSpeed(Double.parseDouble(parser.group(index++)));
// Course
position.setCourse(Double.parseDouble(parser.group(index++)));
// Other
position.set(Event.KEY_GSM, parser.group(index++));
position.set(Event.KEY_EVENT, Integer.parseInt(parser.group(index++)));
position.set(Event.PREFIX_ADC + 1, Integer.parseInt(parser.group(index++)));
position.set(Event.KEY_BATTERY, Integer.parseInt(parser.group(index++)));
position.set(Event.KEY_INPUT, parser.group(index++));
position.set(Event.KEY_STATUS, parser.group(index++));
return position;
}
}
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