/* * Copyright 2012 Alex Wilson <alex@uq.edu.au> * * 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.GenericProtocolDecoder; import org.traccar.helper.Log; import org.traccar.model.DataManager; import org.traccar.model.Position; /** * Maxon Datamax GPS send protocol (NMEA + GPFID) * As seen in the MA100-1010 router * * It sends its identity after the GPRMC sentence, and with the type * GPFID. */ public class MaxonProtocolDecoder extends GenericProtocolDecoder { /** * Device ID */ private Position position = null; /** * Initialize */ public MaxonProtocolDecoder(DataManager dataManager) { super(dataManager); } /** * Regular expressions pattern */ static private Pattern pattern = Pattern.compile( "\\$GPRMC," + "(\\d{2})(\\d{2})(\\d{2})\\.(\\d{2})," + // Time (HHMMSS.SSS) "([AV])," + // Validity "(\\d{2})(\\d{2}\\.\\d{5})," + // Latitude (DDMM.MMMMM) "([NS])," + "(\\d{3})(\\d{2}\\.\\d{5})," + // Longitude (DDDMM.MMMMM) "([EW])," + "(\\d+\\.\\d{3})?," + // Speed "(\\d+\\.\\d{2})?," + // Course "(\\d{2})(\\d{2})(\\d{2})" + // Date (DDMMYY) ".+"); // Other (Checksumm) static private Pattern gpfidPattern = Pattern.compile( "\\$GPFID,(\\d+)$"); /** * Decode message" */ protected Object decode( ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception { String sentence = (String) msg; // Detect device ID // Parse message if (sentence.contains("$GPRMC")) { // Parse message Matcher parser = pattern.matcher(sentence); if (!parser.matches()) { return null; } // Create new position position = new Position(); Integer index = 1; // Time Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC")); time.clear(); 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++))); index += 1; // Skip milliseconds // Validity position.setValid(parser.group(index++).compareTo("A") == 0 ? true : false); // 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 lonlitude = Double.valueOf(parser.group(index++)); lonlitude += Double.valueOf(parser.group(index++)) / 60; if (parser.group(index++).compareTo("W") == 0) lonlitude = -lonlitude; position.setLongitude(lonlitude); // Speed String speed = parser.group(index++); if (speed != null) { position.setSpeed(Double.valueOf(speed)); } else { position.setSpeed(0.0); } // Course String course = parser.group(index++); if (course != null) { position.setCourse(Double.valueOf(course)); } else { position.setCourse(0.0); } // 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()); // Altitude position.setAltitude(0.0); } else if (sentence.contains("$GPFID") && position != null) { Matcher parser = gpfidPattern.matcher(sentence); if (parser.matches()) { String imei = parser.group(1); try { position.setDeviceId(getDataManager().getDeviceByImei(imei).getId()); } catch(Exception error) { Log.warning("Unknown device - " + imei); return null; } return position; } } return null; } }