1 files changed, 181 insertions, 0 deletions

diff --git a/src/org/traccar/protocol/avl08/Avl08ProtocolDecoder.java b/src/org/traccar/protocol/avl08/Avl08ProtocolDecoder.java
new file mode 100644
index 000000000..ca59b8413
--- /dev/null
+++ b/src/org/traccar/protocol/avl08/Avl08ProtocolDecoder.java
@@ -0,0 +1,181 @@
+/*
+ * 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.avl08;
+
+import java.text.ParseException;
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+import java.util.Timer;
+import java.util.TimerTask;
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.oneone.OneToOneDecoder;
+import org.traccar.Position;
+import org.traccar.DataManager;
+import org.jboss.netty.channel.ChannelEvent;
+import org.jboss.netty.channel.ChannelState;
+import org.jboss.netty.channel.ChannelStateEvent;
+
+/**
+ * AVL-08 tracker protocol decoder
+ */
+public class Avl08ProtocolDecoder extends OneToOneDecoder {
+
+    /**
+     * Data manager
+     */
+    private DataManager dataManager;
+
+    /**
+     * Reset connection delay
+     */
+    private Integer resetDelay;
+    
+    /**
+     * Device ID
+     */
+    private Long deviceId;
+
+    /**
+     * Init device table
+     */
+    public Avl08ProtocolDecoder(DataManager dataManager, Integer resetDelay) {
+        this.dataManager = dataManager;
+        this.resetDelay = resetDelay;
+    }
+    
+    /**
+     * Regular expressions pattern
+     */
+    static private Pattern pattern = Pattern.compile(
+            ".{2}" +                     // Length
+            "(\\d{15})\\|" +             // IMEI
+            ".{2}" +                     // Alarm Type
+            "\\$GPRMC," +
+            "(\\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{2})?," +          // Speed
+            "(\\d+.\\d{2})?," +          // Course
+            "(\\d{2})(\\d{2})(\\d{2})" + // Date (DDMMYY)
+            ".+");
+    /**
+     * Decode message
+     */
+    protected Object decode(
+            ChannelHandlerContext ctx, Channel channel, Object msg)
+            throws Exception {
+
+        // Parse message
+        String sentence = (String) msg;
+        Matcher parser = pattern.matcher(sentence);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        // Create new position
+        Position position = new Position();
+
+        Integer index = 1;
+
+        // Get device by IMEI
+        String imei = parser.group(index++);
+        position.setDeviceId(dataManager.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++)));
+
+        // 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;
+    }
+
+    /**
+     * Disconnect channel
+     */
+    class DisconnectTask extends TimerTask {
+        private Channel channel;
+
+        public DisconnectTask(Channel channel) {
+            this.channel = channel;
+        }
+
+        public void run() {
+            channel.disconnect();
+        }
+    }
+
+    /**
+     * Handle connect event
+     */
+    @Override
+    public void handleUpstream(ChannelHandlerContext ctx, ChannelEvent evt) throws Exception {
+        super.handleUpstream(ctx, evt);
+
+        if (evt instanceof ChannelStateEvent) {
+            ChannelStateEvent event = (ChannelStateEvent) evt;
+
+            if (event.getState() == ChannelState.CONNECTED && event.getValue() != null && resetDelay != 0) {
+                new Timer().schedule(new Avl08ProtocolDecoder.DisconnectTask(evt.getChannel()), resetDelay);
+            }
+        }
+    }
+
+}