/* * Copyright 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.LinkedList; import java.util.List; 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 Tlt2hProtocolDecoder extends BaseProtocolDecoder { public Tlt2hProtocolDecoder(ServerManager serverManager) { super(serverManager); } /** * Regular expressions pattern */ static private Pattern pattern = Pattern.compile( "#([0-9a-f]+)?" + // Cell info "\\$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{2})?," + // Speed "(\\d+\\.\\d{2})?," + // Course "(\\d{2})(\\d{2})(\\d{2})" + // Date (DDMMYY) ".+"); // Other (Checksumm) @Override protected Object decode( ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception { String sentence = (String) msg; // Get device identifier String imei = sentence.substring(1, sentence.indexOf('#', 1)); long deviceId; try { deviceId = getDataManager().getDeviceByImei(imei).getId(); } catch(Exception error) { Log.warning("Unknown device - " + imei); return null; } String[] messages = sentence.substring(sentence.indexOf('\n') + 1).split("\r\n"); List<Position> positions = new LinkedList<Position>(); for (String message : messages) { Matcher parser = pattern.matcher(message); if (parser.matches()) { Position position = new Position(); StringBuilder extendedInfo = new StringBuilder("<protocol>tlt2h</protocol>"); position.setDeviceId(deviceId); Integer index = 1; // Cell String cell = parser.group(index++); if (cell != null) { extendedInfo.append("<cell>").append(cell).append("</cell>"); } // 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); position.setExtendedInfo(extendedInfo.toString()); positions.add(position); } } return positions; } }