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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.nio.charset.Charset;
import java.util.Calendar;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.helper.ChannelBufferTools;
import org.traccar.helper.Crc;
import org.traccar.model.Event;
import org.traccar.model.Position;
public class CityeasyProtocolDecoder extends BaseProtocolDecoder {
public CityeasyProtocolDecoder(CityeasyProtocol protocol) {
super(protocol);
}
private static final Pattern pattern = Pattern.compile(
"(\\d{4})(\\d{2})(\\d{2})" + // Date
"(\\d{2})(\\d{2})(\\d{2})," + // Time
"([AV])," + // Validity
"(\\d+)," + // Satellites
"([NS]),(\\d+\\.\\d+)," + // Latitude
"([EW]),(\\d+\\.\\d+)," + // Longitude
"(\\d+\\.\\d)," + // Speed
"(\\d+\\.\\d)," + // HDOP
"(\\d+\\.\\d);" + // Altitude
"(\\d+)," + // MCC
"(\\d+)," + // MNC
"(\\d+)," + // LAC
"(\\d+)" + // Cell
".*");
private static final int MSG_LOCATION_REPORT = 0x0003;
private static final int MSG_LOCATION_INQUIRY_RESPONSE = 0x0004;
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg)
throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
buf.skipBytes(2); // header
buf.readUnsignedShort(); // length
String imei = ChannelBufferTools.readHexString(buf, 14);
if (!identify(imei, channel, null, false)) {
if (!identify(imei + Crc.luhnChecksum(Long.valueOf(imei)), channel)) {
return null;
}
}
int type = buf.readUnsignedShort();
if (type == MSG_LOCATION_REPORT || type == MSG_LOCATION_INQUIRY_RESPONSE) {
String sentence = buf.toString(buf.readerIndex(), buf.readableBytes() - 8, Charset.defaultCharset());
Matcher parser = pattern.matcher(sentence);
if (!parser.matches()) {
return null;
}
Position position = new Position();
position.setProtocol(getProtocolName());
position.setDeviceId(getDeviceId());
Integer index = 1;
// Date and time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.YEAR, 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());
position.setValid(parser.group(index++).equals("A"));
position.set(Event.KEY_SATELLITES, parser.group(index++));
// Latitude
String hemisphere = parser.group(index++);
double latitude = Double.parseDouble(parser.group(index++));
if (hemisphere.compareTo("S") == 0) {
latitude = -latitude;
}
position.setLatitude(latitude);
// Longitude
hemisphere = parser.group(index++);
double longitude = Double.parseDouble(parser.group(index++));
if (hemisphere.compareTo("W") == 0) {
longitude = -longitude;
}
position.setLongitude(longitude);
position.setSpeed(Double.parseDouble(parser.group(index++)));
position.set(Event.KEY_HDOP, Double.parseDouble(parser.group(index++)));
position.setAltitude(Double.parseDouble(parser.group(index++)));
position.set(Event.KEY_MCC, Integer.parseInt(parser.group(index++)));
position.set(Event.KEY_MNC, Integer.parseInt(parser.group(index++)));
position.set(Event.KEY_LAC, Integer.parseInt(parser.group(index++)));
position.set(Event.KEY_CELL, Integer.parseInt(parser.group(index++)));
return position;
}
return null;
}
}
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