/* * Copyright 2012 - 2013 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; public class Gps103ProtocolDecoder extends BaseProtocolDecoder { public Gps103ProtocolDecoder(ServerManager serverManager) { super(serverManager); } /** * Regular expressions pattern */ static private Pattern pattern = Pattern.compile( "imei:" + "(\\d+)," + // IMEI "([^,]+)," + // Alarm "(\\d{2})/?(\\d{2})/?(\\d{2})\\s?" + // Local Date "(\\d{2}):?(\\d{2})," + // Local Time "[^,]*," + "[FL]," + // F - full / L - low "(\\d{2})(\\d{2})(\\d{2})\\.(\\d{3})," + // Time UTC (HHMMSS.SSS) "([AV])," + // Validity "(\\d{2})(\\d{2}\\.\\d{4})," + // Latitude (DDMM.MMMM) "([NS])," + "(\\d{3})(\\d{2}\\.\\d{4})," + // Longitude (DDDMM.MMMM) "([EW])?," + "(\\d+\\.?\\d*)," + // Speed "(\\d+\\.\\d+)?" + // Course ".*"); @Override protected Object decode( ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception { String sentence = (String) msg; // Send response #1 if (sentence.contains("##")) { if (channel != null) { channel.write("LOAD"); } return null; } // Send response #2 if (sentence.length() == 15 && Character.isDigit(sentence.charAt(0))) { if (channel != null) { channel.write("ON"); } return null; } // Parse message Matcher parser = pattern.matcher(sentence); if (!parser.matches()) { Log.info("Parsing error"); return null; } // Create new position Position position = new Position(); StringBuilder extendedInfo = new StringBuilder("<protocol>gps103</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; } // Alarm message extendedInfo.append("<alarm>"); extendedInfo.append(parser.group(index++)); extendedInfo.append("</alarm>"); // Date 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++))); int localHours = Integer.valueOf(parser.group(index++)); int localMinutes = Integer.valueOf(parser.group(index++)); int utcHours = Integer.valueOf(parser.group(index++)); int utcMinutes = Integer.valueOf(parser.group(index++)); // Time time.set(Calendar.HOUR, localHours); time.set(Calendar.MINUTE, localMinutes); time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++))); time.set(Calendar.MILLISECOND, Integer.valueOf(parser.group(index++))); // Timezone calculation int deltaMinutes = (localHours - utcHours) * 60 + localMinutes - utcMinutes; if (deltaMinutes <= -12 * 60) { deltaMinutes += 24 * 60; } else if (deltaMinutes > 12 * 60) { deltaMinutes -= 24 * 60; } time.add(Calendar.MINUTE, -deltaMinutes); position.setTime(time.getTime()); // 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; String hemisphere = parser.group(index++); if (hemisphere != null) { if (hemisphere.compareTo("W") == 0) lonlitude = -lonlitude; } position.setLongitude(lonlitude); // Altitude position.setAltitude(0.0); // Speed position.setSpeed(Double.valueOf(parser.group(index++))); // Course String course = parser.group(index++); if (course != null) { position.setCourse(Double.valueOf(course)); } else { position.setCourse(0.0); } // Extended info position.setExtendedInfo(extendedInfo.toString()); return position; } }