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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 org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.traccar.BaseProtocolDecoder;
import org.traccar.database.DataManager;
import org.traccar.helper.Log;
import org.traccar.model.ExtendedInfoFormatter;
import org.traccar.model.Position;
import java.util.Date;
import java.util.Properties;
public class TramigoProtocolDecoder extends BaseProtocolDecoder {
public TramigoProtocolDecoder(DataManager dataManager, String protocol, Properties properties) {
super(dataManager, protocol, properties);
}
private static final int MSG_COMPACT = 0x0100;
private static final int MSG_FULL = 0x00FE;
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
if (buf.readUnsignedByte() != 1) {
return null; // wrong protocol version
}
buf.readUnsignedByte(); // version id
int index = buf.readUnsignedShort();
int type = buf.readUnsignedShort();
buf.readUnsignedShort(); // length
buf.readUnsignedShort(); // mask
buf.readUnsignedShort(); // checksum
long id = buf.readUnsignedInt();
buf.readUnsignedInt(); // time
if (type == MSG_COMPACT || type == MSG_FULL) {
// Create new position
Position position = new Position();
ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter(getProtocol());
extendedInfo.set("index", index);
// Get device id
try {
position.setDeviceId(getDataManager().getDeviceByImei(String.valueOf(id)).getId());
} catch(Exception error) {
Log.warning("Unknown device - " + id);
return null;
}
buf.readUnsignedShort(); // report trigger
buf.readUnsignedShort(); // state flag
position.setValid(true);
position.setLatitude(buf.readUnsignedInt() * 0.0000001);
position.setLongitude(buf.readUnsignedInt() * 0.0000001);
position.setAltitude(0.0);
buf.readUnsignedShort(); // GSM signal quality
buf.readUnsignedShort(); // satellites in fix
buf.readUnsignedShort(); // satellites in track
buf.readUnsignedShort(); // GPS antenna state
position.setSpeed(buf.readUnsignedShort() * 0.194384);
position.setCourse((double )buf.readUnsignedShort());
buf.readUnsignedInt(); // distance
extendedInfo.set("battery", buf.readUnsignedShort());
buf.readUnsignedShort(); // battery charger status
position.setTime(new Date(buf.readUnsignedInt() * 1000));
// TODO: parse other data
position.setExtendedInfo(extendedInfo.toString());
return position;
}
return null;
}
}
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