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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.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.jboss.netty.channel.ChannelHandlerContext;
import org.traccar.BaseProtocolDecoder;
import org.traccar.helper.ChannelBufferTools;
import org.traccar.model.Position;
public class RitiProtocolDecoder extends BaseProtocolDecoder {
public RitiProtocolDecoder(String protocol) {
super(protocol);
}
private static final Pattern pattern = Pattern.compile(
"\\$GPRMC," +
"(\\d{2})(\\d{2})(\\d{2})\\.?\\d*," + // Time (HHMMSS.SSS)
"([AV])," + // Validity
"(\\d{2})(\\d{2}\\.\\d+)," + // Latitude (DDMM.MMMM)
"([NS])," +
"(\\d{3})(\\d{2}\\.\\d+)," + // Longitude (DDDMM.MMMM)
"([EW])," +
"(\\d+\\.?\\d*)?," + // Speed
"(\\d+\\.?\\d*)?," + // Course
"(\\d{2})(\\d{2})(\\d{2})" + // Date (DDMMYY)
".+");
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
// Create new position
Position position = new Position();
position.setProtocol(getProtocol());
buf.skipBytes(2); // header
// Get device id
if (!identify(String.valueOf(buf.readUnsignedShort()))) {
return null;
}
position.setDeviceId(getDeviceId());
position.set("mode", buf.readUnsignedByte());
position.set("command", buf.readUnsignedByte());
position.set("power", buf.readUnsignedShort());
buf.skipBytes(5);
buf.readUnsignedShort();
buf.readUnsignedShort();
position.set("distance", buf.readUnsignedInt());
position.set("milage", buf.readUnsignedInt());
// Parse GPRMC
Integer end = ChannelBufferTools.find(buf, buf.readerIndex(), buf.readerIndex() + 80, "*");
String gprmc = buf.toString(
buf.readerIndex(), end - buf.readerIndex(), Charset.defaultCharset());
Matcher parser = pattern.matcher(gprmc);
if (!parser.matches()) {
return null;
}
Integer index = 1;
// 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++)));
// 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;
if (parser.group(index++).compareTo("W") == 0) longitude = -longitude;
position.setLongitude(longitude);
// Speed
String speed = parser.group(index++);
if (speed != null) {
position.setSpeed(Double.valueOf(speed));
}
// 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());
return position;
}
}
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