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/*
* Copyright 2010 Anton Tananaev (anton@tananaev.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.gl100;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.TimeZone;
import java.util.Timer;
import java.util.TimerTask;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.handler.codec.oneone.OneToOneDecoder;
import org.traccar.Position;
import org.traccar.DataManager;
import org.jboss.netty.channel.ChannelEvent;
import org.jboss.netty.channel.ChannelState;
import org.jboss.netty.channel.ChannelStateEvent;
/**
* GL200 tracker protocol decoder
*/
public class Gl100ProtocolDecoder extends OneToOneDecoder {
/**
* Data manager
*/
private DataManager dataManager;
/**
* Reset connection delay
*/
private Integer resetDelay;
/**
* Init device table
*/
public Gl100ProtocolDecoder(DataManager dataManager, Integer resetDelay) {
this.dataManager = dataManager;
this.resetDelay = resetDelay;
}
/**
* Regular expressions pattern
*/
static private Pattern pattern = Pattern.compile(
"\\+RESP:GT...," +
"(\\d{15})," + // IMEI
"(?:(?:\\d+," + // Number
"\\d," + // Reserved / Geofence id
"\\d)|" + // Reserved / Geofence alert
"(?:[^,]*))," + // Calling number
"([01])," + // GPS fix
"(\\d+.\\d)," + // Speed
"(\\d+)," + // Course
"(-?\\d+.\\d)," + // Altitude
"\\d*," + // GPS accuracy
"(-?\\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(dataManager.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 = new GregorianCalendar(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;
}
/**
* Disconnect channel
*/
class DisconnectTask extends TimerTask {
private Channel channel;
public DisconnectTask(Channel channel) {
this.channel = channel;
}
public void run() {
channel.disconnect();
}
}
/**
* Handle connect event
*/
@Override
public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent evt) throws Exception {
super.handleUpstream(ctx, evt);
if (evt instanceof ChannelStateEvent) {
ChannelStateEvent event = (ChannelStateEvent) evt;
if (event.getState() == ChannelState.CONNECTED && event.getValue() != null && resetDelay != 0) {
new Timer().schedule(new DisconnectTask(evt.getChannel()), resetDelay);
}
}
}
}
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