diff options
Diffstat (limited to 'src/org/traccar/protocol/MeiligaoProtocolDecoder.java')
| -rw-r--r-- | src/org/traccar/protocol/MeiligaoProtocolDecoder.java | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/MeiligaoProtocolDecoder.java b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java new file mode 100644 index 000000000..e836289e4 --- /dev/null +++ b/src/org/traccar/protocol/MeiligaoProtocolDecoder.java @@ -0,0 +1,207 @@ +/* + * 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.nio.charset.Charset; +import java.text.ParseException; +import java.util.Calendar; +import java.util.GregorianCalendar; +import java.util.TimeZone; +import java.util.regex.Matcher; +import java.util.regex.Pattern; +import org.jboss.netty.buffer.ChannelBuffer; +import org.jboss.netty.buffer.HeapChannelBufferFactory; +import org.jboss.netty.channel.Channel; +import org.jboss.netty.channel.ChannelHandlerContext; +import org.traccar.GenericProtocolDecoder; +import org.traccar.helper.Crc; +import org.traccar.model.DataManager; +import org.traccar.model.Position; + +/** + * Meiligao protocol decoder + */ +public class MeiligaoProtocolDecoder extends GenericProtocolDecoder { + + /** + * Initialize + */ + public MeiligaoProtocolDecoder(DataManager dataManager, Integer resetDelay) { + super(dataManager, resetDelay); + } + + /** + * Regular expressions pattern + */ + static private Pattern pattern = Pattern.compile( + "([\\d]{2})([\\d]{2})([\\d]{2}).([\\d]{3})," + // Time (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 + "([\\d]{2})([\\d]{2})([\\d]{2})," + // Date (DDMMYY) + "[^\\|]+\\|(\\d+.\\d)\\|" + // Dilution of precision + "(\\d+)\\|" + // Altitude + "([0-9a-fA-F]+)\\|" + // State + ".*"); // TODO: parse ADC + + /** + * Parse device id + */ + private String getId(ChannelBuffer buf) { + String id = ""; + + for (int i = 0; i < 7; i++) { + int b = buf.getUnsignedByte(i); + + // First digit + int d1 = (b & 0xf0) >> 4; + if (d1 == 0xf) break; + id += d1; + + // Second digit + int d2 = (b & 0x0f); + if (d2 == 0xf) break; + id += d2; + } + + return id; + } + + /** + * Decode message + */ + protected Object decode( + ChannelHandlerContext ctx, Channel channel, Object msg) + throws Exception { + + ChannelBuffer buf = (ChannelBuffer) msg; + int command = buf.getUnsignedShort(7); + + // Login confirmation + if (command == 0x5000) { + ChannelBuffer sendBuf = HeapChannelBufferFactory.getInstance().getBuffer(18); + sendBuf.writeByte('@'); + sendBuf.writeByte('@'); + sendBuf.writeShort(sendBuf.capacity()); + byte[] array = new byte[7]; + buf.getBytes(0, array); + sendBuf.writeBytes(array); + sendBuf.writeShort(0x4000); + sendBuf.writeByte(0x01); + array = new byte[sendBuf.readableBytes()]; + sendBuf.getBytes(0, array); + sendBuf.writeShort(Crc.crc16Ccitt(array)); + sendBuf.writeByte('\r'); + sendBuf.writeByte('\n'); + if (channel != null) { + channel.write(sendBuf); + } + } + + // Data offset + int offset = 7 + 2; + if (command == 0x9955) { + offset += 0; + } else if (command == 0x9016) { + offset += 6; + } else if (command == 0x9999) { + offset += 1; + } else { + return null; + } + + // Create new position + Position position = new Position(); + String extendedInfo = "<protocol>meiligao</protocol>"; + + // Get device by id + // TODO: change imei to unique id + position.setDeviceId(getDataManager().getDeviceByImei(getId(buf)).getId()); + + // Parse message + String sentence = buf.toString(offset, buf.readableBytes() - offset - 4, Charset.defaultCharset()); + Matcher parser = pattern.matcher(sentence); + if (!parser.matches()) { + throw new ParseException(null, 0); + } + + Integer index = 1; + + // Time + Calendar time = new GregorianCalendar(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++))); + time.set(Calendar.MILLISECOND, Integer.valueOf(parser.group(index++))); + + // 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 + 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); + } + + // 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()); + + // Dilution of precision + extendedInfo += "<hdop>" + parser.group(index++) + "</hdop>"; + + // Altitude + String altitude = parser.group(index++); + if (altitude != null) { + position.setAltitude(Double.valueOf(altitude)); + } else { + position.setAltitude(0.0); + } + + // State + extendedInfo += "<state>" + parser.group(index++) + "</state>"; + + // Extended info + position.setExtendedInfo(extendedInfo); + + return position; + } + +} |