Add new MaxonProtocolDecoder class

1 files changed, 154 insertions, 0 deletions

diff --git a/src/org/traccar/protocol/MaxonProtocolDecoder.java b/src/org/traccar/protocol/MaxonProtocolDecoder.java
new file mode 100644
index 000000000..7e26c9c19
--- /dev/null
+++ b/src/org/traccar/protocol/MaxonProtocolDecoder.java
@@ -0,0 +1,154 @@
+/*
+ * 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.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, 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.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);
+                position.setDeviceId(getDataManager().getDeviceByImei(imei).getId());
+                return position;
+            }
+        }
+
+        return null;
+    }
+
+}