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authorAnton Tananaev <anton.tananaev@gmail.com>2012-06-03 20:18:03 +0400
committerAnton Tananaev <anton.tananaev@gmail.com>2012-06-03 20:18:03 +0400
commitf442d992179fe0355177181c01cc6c7ca8bfaca1 (patch)
treeaccc453bc5897a20ecfc239041ea130734232a01 /src/org/traccar/protocol
parent02de9b3a41bdb4dd3b10ec646200369b94b673fe (diff)
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Added Enfora protocol (fix #2)
Diffstat (limited to 'src/org/traccar/protocol')
-rw-r--r--src/org/traccar/protocol/EnforaProtocolDecoder.java187
1 files changed, 187 insertions, 0 deletions
diff --git a/src/org/traccar/protocol/EnforaProtocolDecoder.java b/src/org/traccar/protocol/EnforaProtocolDecoder.java
new file mode 100644
index 000000000..eb9cb8ae4
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+++ b/src/org/traccar/protocol/EnforaProtocolDecoder.java
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+/*
+ * 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.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.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;
+
+/**
+ * Enfora protocol decoder
+ */
+public class EnforaProtocolDecoder extends GenericProtocolDecoder {
+
+ /**
+ * Initialize
+ */
+ public EnforaProtocolDecoder(DataManager dataManager, Integer resetDelay) {
+ super(dataManager, resetDelay);
+ }
+
+ /**
+ * Regular expressions pattern
+ */
+ static private Pattern pattern = Pattern.compile(
+ "GPRMC," +
+ "(\\d{2})(\\d{2})(\\d{2}).(\\d{2})," + // Time (HHMMSS.SS)
+ "([AV])," + // Validity
+ "(\\d{2})(\\d{2}.\\d{6})," + // Latitude (DDMM.MMMMMM)
+ "([NS])," +
+ "(\\d{3})(\\d{2}.\\d{6})," + // Longitude (DDDMM.MMMMMM)
+ "([EW])," +
+ "(\\d+.\\d)?," + // Speed
+ "(\\d+.\\d)?," + // Course
+ "(\\d{2})(\\d{2})(\\d{2})," + // Date (DDMMYY)
+ ".*[\r\n]*");
+
+ public static final int IMEI_LENGTH = 15;
+
+ // TODO: avoid copy-paste (from XexunFrameDecoder)
+ private static Integer find(
+ ChannelBuffer buf,
+ Integer start,
+ Integer length,
+ String subString) {
+
+ int index = start;
+ boolean match;
+
+ for (; index < length; index++) {
+ match = true;
+
+ for (int i = 0; i < subString.length(); i++) {
+ char c = (char) buf.getByte(index + i);
+ if (c != subString.charAt(i)) {
+ match = false;
+ break;
+ }
+ }
+
+ if (match) {
+ return index;
+ }
+ }
+
+ return null;
+ }
+
+ /**
+ * Decode message
+ */
+ protected Object decode(
+ ChannelHandlerContext ctx, Channel channel, Object msg)
+ throws Exception {
+
+ ChannelBuffer buf = (ChannelBuffer) msg;
+
+ // Find IMEI (Modem ID)
+ String imei = null;
+ for (int first = -1, i = 0; i < buf.readableBytes(); i++) {
+ if (!Character.isDigit((char) buf.getByte(i))) {
+ first = i + 1;
+ }
+
+ // Found digit string
+ if (i - first == IMEI_LENGTH - 1) {
+ imei = buf.toString(first, IMEI_LENGTH, Charset.defaultCharset());
+ break;
+ }
+ }
+
+ // Write log
+ if (imei == null) {
+ Log.warning("Enfora decoder failed to find IMEI");
+ return null;
+ }
+
+ // Find GPSMC string
+ Integer start = find(buf, 0, buf.readableBytes(), "GPRMC");
+ if (start == null) {
+ // Message does not contain GPS data
+ return null;
+ }
+ String sentence = buf.toString(start, buf.readableBytes() - start, Charset.defaultCharset());
+
+ // Parse message
+ Matcher parser = pattern.matcher(sentence);
+ if (!parser.matches()) {
+ return null;
+ }
+
+ // Create new position
+ Position position = new Position();
+ Integer index = 1;
+
+ // Get device by IMEI
+ position.setDeviceId(getDataManager().getDeviceByImei(imei).getId());
+
+ // 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++)) * 10);
+
+ // 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);
+
+ // 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);
+ }
+
+ // 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());
+
+ return position;
+ }
+
+}