/* * Copyright 2012 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.ServerManager; import org.traccar.helper.Log; import org.traccar.model.Position; /** * Meitrack protocol decoder */ public class MeitrackProtocolDecoder extends BaseProtocolDecoder { /** * Initialize */ public MeitrackProtocolDecoder(ServerManager serverManager) { super(serverManager); } /** * Regular expressions pattern */ static private Pattern pattern = Pattern.compile( "\\$\\$." + // Flag "\\d+," + // Length "(\\d+)," + // IMEI "[0-9a-fA-F]{3}," + // Command "(\\d+)," + // Event "(-?\\d+\\.\\d+)," + // Latitude "(-?\\d+\\.\\d+)," + // Longitude "(\\d{2})(\\d{2})(\\d{2})" + // Date (YYMMDD) "(\\d{2})(\\d{2})(\\d{2})," + // Time (HHMMSS) "([AV])," + // Validity "(\\d+)," + // Satellites "(\\d+)," + // GSM Signal "(\\d+)," + // Speed "(\\d+)," + // Course "(\\d+)," + // HDOP "(\\d+)," + // Altitude "(\\d+)," + // Milage ".*"); // TODO: parse other stuff /** * Decode message */ protected Object decode( ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception { // Parse message String sentence = (String) msg; Matcher parser = pattern.matcher(sentence); if (!parser.matches()) { return null; } // Create new position Position position = new Position(); StringBuilder extendedInfo = new StringBuilder("<protocol>meitrack</protocol>"); Integer index = 1; // Get device by IMEI String imei = parser.group(index++); try { position.setDeviceId(getDataManager().getDeviceByImei(imei).getId()); } catch(Exception error) { Log.warning("Unknown device - " + imei); return null; } // Event extendedInfo.append("<event>"); extendedInfo.append(parser.group(index++)); extendedInfo.append("</event>"); // Coordinates position.setLatitude(Double.valueOf(parser.group(index++))); position.setLongitude(Double.valueOf(parser.group(index++))); // Time Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC")); time.clear(); time.set(Calendar.YEAR, 2000 + 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.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()); // Validity position.setValid(parser.group(index++).compareTo("A") == 0 ? true : false); // Satellites extendedInfo.append("<satellites>"); extendedInfo.append(parser.group(index++)); extendedInfo.append("</satellites>"); // GSM Signal extendedInfo.append("<gsm>"); extendedInfo.append(parser.group(index++)); extendedInfo.append("</gsm>"); // Speed position.setSpeed(Double.valueOf(parser.group(index++))); // Course position.setCourse(Double.valueOf(parser.group(index++))); // HDOP extendedInfo.append("<hdop>"); extendedInfo.append(parser.group(index++)); extendedInfo.append("</hdop>"); // Altitude position.setAltitude(Double.valueOf(parser.group(index++))); // Milage extendedInfo.append("<milage>"); extendedInfo.append(parser.group(index++)); extendedInfo.append("</milage>"); // Extended info position.setExtendedInfo(extendedInfo.toString()); return position; } }