Add JT600 support (fix #58)

1 files changed, 220 insertions, 0 deletions

diff --git a/src/org/traccar/protocol/Jt600ProtocolDecoder.java b/src/org/traccar/protocol/Jt600ProtocolDecoder.java
new file mode 100644
index 000000000..8a2be63fb
--- /dev/null
+++ b/src/org/traccar/protocol/Jt600ProtocolDecoder.java
@@ -0,0 +1,220 @@
+/*
+ * 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.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.ChannelBufferTools;
+import org.traccar.model.DataManager;
+import org.traccar.model.Position;
+
+/**
+ * JT600 protocol decoder
+ */
+public class Jt600ProtocolDecoder extends GenericProtocolDecoder {
+
+    /**
+     * Initialize
+     */
+    public Jt600ProtocolDecoder(DataManager dataManager, Integer resetDelay) {
+        super(dataManager, resetDelay);
+    }
+
+    /**
+     * Decode regular message
+     */
+    private Position decodeNormalMessage(ChannelBuffer buf) throws Exception {
+        
+        Position position = new Position();
+        
+        buf.readByte(); // header
+        
+        // Get device by identifier
+        int id = ChannelBufferTools.readHexInteger(buf, 10);
+        position.setDeviceId(getDataManager().getDeviceByImei(String.valueOf(id)).getId());
+        
+        buf.readByte(); // protocol version + data type
+        
+        buf.readBytes(2); // length
+        
+        // Time
+        Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
+        time.clear();
+        time.set(Calendar.DAY_OF_MONTH, ChannelBufferTools.readHexInteger(buf, 2));
+        time.set(Calendar.MONTH, ChannelBufferTools.readHexInteger(buf, 2) - 1);
+        time.set(Calendar.YEAR, 2000 + ChannelBufferTools.readHexInteger(buf, 2));
+        time.set(Calendar.HOUR, ChannelBufferTools.readHexInteger(buf, 2));
+        time.set(Calendar.MINUTE, ChannelBufferTools.readHexInteger(buf, 2));
+        time.set(Calendar.SECOND, ChannelBufferTools.readHexInteger(buf, 2));
+        position.setTime(time.getTime());
+        
+        // Coordinates
+        int temp = ChannelBufferTools.readHexInteger(buf, 8);
+        double latitude = temp % 1000000;
+        latitude /= 60 * 10000;
+        latitude += temp / 1000000;
+        temp = ChannelBufferTools.readHexInteger(buf, 9);
+        double longitude = temp % 1000000;
+        longitude /= 60 * 10000;
+        longitude += temp / 1000000;
+        
+        // Flags
+        byte flags = buf.readByte();
+        position.setValid((flags & 0x1) == 0x1);
+        if ((flags & 0x2) == 0) latitude = -latitude;
+        position.setLatitude(latitude);
+        if ((flags & 0x4) == 0) longitude = -longitude;
+        position.setLongitude(longitude);
+        
+        // Speed
+        double speed = ChannelBufferTools.readHexInteger(buf, 2);
+        position.setSpeed(speed);
+
+        // Course
+        double course = buf.readUnsignedByte() * 2;
+        position.setCourse(course);
+        
+        buf.readByte(); // number of satellites
+        
+        // Course
+        double power = buf.readUnsignedByte();
+        position.setPower(power);
+        
+        buf.readByte(); // other flags and sensors
+        
+        // Altitude
+        double altitude = buf.readUnsignedShort();
+        position.setAltitude(altitude);
+        
+        buf.readUnsignedShort(); // cell id
+        buf.readUnsignedShort(); // lac
+        
+        buf.readUnsignedByte(); // gsm signal
+        
+        buf.readUnsignedByte(); // message number
+        
+        return position;
+    }
+
+    /**
+     * Alert message pattern
+     */
+    static private Pattern pattern = Pattern.compile(
+            "\\(" +
+            "([\\d]+)," +                // Id
+            "W01," +                     // Type
+            "(\\d{3})(\\d{2}.\\d{4})," + // Longitude (DDDMM.MMMM)
+            "([EW])," +
+            "(\\d{2})(\\d{2}.\\d{4})," + // Latitude (DDMM.MMMM)
+            "([NS])," +
+            "([AV])," +                  // Validity
+            "(\\d{2})(\\d{2})(\\d{2})," + // Date (DDMMYY)
+            "(\\d{2})(\\d{2})(\\d{2})," + // Time (HHMMSS)
+            "(\\d+)," +                  // Speed (km/h)
+            "(\\d+)," +                  // Course
+            "(\\d+)," +                  // Power
+            "(\\d+)," +                  // GPS signal
+            "(\\d+)," +                  // GSM signal
+            "(\\d+)," +                  // Alert Type
+            ".*\\)");
+
+    /**
+     * Decode alert message
+     */
+    private Position decodeAlertMessage(ChannelBuffer buf) throws Exception {
+
+        String message = buf.toString(Charset.defaultCharset());
+        
+        // Parse message
+        Matcher parser = pattern.matcher(message);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        // Create new position
+        Position position = new Position();
+        Integer index = 1;
+
+        // Get device by identifier
+        String id = parser.group(index++);
+        position.setDeviceId(getDataManager().getDeviceByImei(id).getId());
+
+        // 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);
+        
+        // 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);
+
+        // Validity
+        position.setValid(parser.group(index++).compareTo("A") == 0 ? true : false);
+        
+        // Time
+        Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
+        time.clear();
+        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++)));
+        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++)));
+        position.setTime(time.getTime());
+
+        // Speed
+        position.setSpeed(Double.valueOf(parser.group(index++)));
+
+        // Course
+        position.setCourse(Double.valueOf(parser.group(index++)));
+
+        // Power
+        position.setPower(Double.valueOf(parser.group(index++)));
+        
+        return position;
+    }
+
+    /**
+     * Decode message
+     */
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, Object msg)
+            throws Exception {
+
+        ChannelBuffer buf = (ChannelBuffer) msg;
+        char first = (char) buf.getByte(0);
+
+        // Check message type
+        if (first == '$') {
+            return decodeNormalMessage(buf);
+        } else if (first == '(') {
+            return decodeAlertMessage(buf);
+        }
+
+        return null;
+    }
+
+}