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/*
* Copyright 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.Event;
import org.traccar.model.Position;
public class MiniFinderProtocolDecoder extends BaseProtocolDecoder {
public MiniFinderProtocolDecoder(String protocol) {
super(protocol);
}
private static final Pattern pattern = Pattern.compile(
"\\!D," +
"(\\d+)/(\\d+)/(\\d+)," + // Date
"(\\d+):(\\d+):(\\d+)," + // Time
"(-?\\d+\\.\\d+)," + // Latitude
"(-?\\d+\\.\\d+)," + // Longitude
"(\\d+\\.?\\d*)," + // Speed
"(\\d+\\.?\\d*)," + // Course
"(\\p{XDigit}+)," + // Flags
"(-?\\d+\\.\\d+)," + // Altitude
"(\\d+)," + // Battery
"(\\d+)," + // Satellites in use
"(\\d+)," + // Satellites in view
"0");
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
String sentence = (String) msg;
// Identification
if (sentence.startsWith("!1")) {
identify(sentence.substring(3, sentence.length()));
}
// Location
else if (sentence.startsWith("!D") && hasDeviceId()) {
// Parse message
Matcher parser = pattern.matcher(sentence);
if (!parser.matches()) {
return null;
}
// Create new position
Position position = new Position();
position.setProtocol(getProtocol());
position.setDeviceId(getDeviceId());
Integer index = 1;
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
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++)));
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());
// Location
position.setLatitude(Double.valueOf(parser.group(index++)));
position.setLongitude(Double.valueOf(parser.group(index++)));
position.setSpeed(Double.valueOf(parser.group(index++)));
position.setCourse(Double.valueOf(parser.group(index++)));
// Flags
String flags = parser.group(index++);
position.set(Event.KEY_FLAGS, flags);
position.setValid((Integer.parseInt(flags, 16) & 0x01) != 0);
// Altitude
position.setAltitude(Double.valueOf(parser.group(index++)));
// Battery
position.set(Event.KEY_BATTERY, parser.group(index++));
// Satellites
position.set(Event.KEY_SATELLITES, parser.group(index++));
return position;
}
return null;
}
}
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