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/*
* Copyright 2012 - 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.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.jboss.netty.channel.ChannelHandlerContext;
import org.traccar.BaseProtocolDecoder;
import org.traccar.model.Event;
import org.traccar.model.Position;
public class XexunProtocolDecoder extends BaseProtocolDecoder {
private boolean full;
public XexunProtocolDecoder(XexunProtocol protocol, boolean full) {
super(protocol);
this.full = full;
}
static private Pattern patternBasic = Pattern.compile(
"G[PN]RMC," +
"(\\d{2})(\\d{2})(\\d{2})\\.(\\d+)," + // Time (HHMMSS.SSS)
"([AV])," + // Validity
"(\\d+)(\\d{2}\\.\\d+)," + // Latitude (DDMM.MMMM)
"([NS])," +
"(\\d+)(\\d{2}\\.\\d+)," + // Longitude (DDDMM.MMMM)
"([EW])?," +
"(\\d+\\.?\\d*)," + // Speed
"(\\d+\\.?\\d*)?," + // Course
"(\\d{2})(\\d{2})(\\d{2})," + // Date (DDMMYY)
"[^\\*]*\\*..," + // Checksum
"([FL])," + // Signal
"(?:([^,]*),)?" + // Alarm
".*imei:" +
"(\\d+),"); // IMEI
static private Pattern patternFull = Pattern.compile(
"[\r\n]*" +
"(\\d+)," + // Serial
"([^,]+)?," + // Number
patternBasic.pattern() +
"(\\d+)," + // Satellites
"(-?\\d+\\.\\d+)?," + // Altitude
"[FL]:(\\d+\\.\\d+)V" + // Power
".*" +
"[\r\n]*");
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg)
throws Exception {
// Parse message
Pattern pattern = full ? patternFull : patternBasic;
Matcher parser = pattern.matcher((String) msg);
if (!parser.matches()) {
return null;
}
// Create new position
Position position = new Position();
position.setProtocol(getProtocolName());
Integer index = 1;
if (full) {
position.set("serial", parser.group(index++));
position.set("number", parser.group(index++));
}
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
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++)));
time.set(Calendar.MILLISECOND, Integer.valueOf(parser.group(index++)));
// Validity
position.setValid(parser.group(index++).compareTo("A") == 0);
// Latitude
Double latitude = Double.valueOf(parser.group(index++));
latitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
position.setLatitude(latitude);
// Longitude
Double longitude = Double.valueOf(parser.group(index++));
longitude += Double.valueOf(parser.group(index++)) / 60;
String hemisphere = parser.group(index++);
if (hemisphere != null) {
if (hemisphere.compareTo("W") == 0) longitude = -longitude;
}
position.setLongitude(longitude);
// Speed
position.setSpeed(Double.valueOf(parser.group(index++)));
// Course
String course = parser.group(index++);
if (course != null) {
position.setCourse(Double.valueOf(course));
}
// Date
time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
position.setTime(time.getTime());
// Signal
position.set("signal", parser.group(index++));
// Alarm
position.set(Event.KEY_ALARM, parser.group(index++));
// Get device by IMEI
if (!identify(parser.group(index++), channel)) {
return null;
}
position.setDeviceId(getDeviceId());
if (full) {
// Satellites
position.set(Event.KEY_SATELLITES, parser.group(index++).replaceFirst ("^0*(?![\\.$])", ""));
// Altitude
String altitude = parser.group(index++);
if (altitude != null) {
position.setAltitude(Double.valueOf(altitude));
}
// Power
position.set(Event.KEY_POWER, Double.valueOf(parser.group(index++)));
}
return position;
}
}
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