2 files changed, 267 insertions, 0 deletions

diff --git a/src/org/traccar/protocol/xexun/XexunFrameDecoder.java b/src/org/traccar/protocol/xexun/XexunFrameDecoder.java
new file mode 100644
index 000000000..839e5b3ec
--- /dev/null
+++ b/src/org/traccar/protocol/xexun/XexunFrameDecoder.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2010 Anton Tananaev (anton@tananaev.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 net.sourceforge.opentracking.protocol.xexun;
+
+import org.jboss.netty.handler.codec.frame.FrameDecoder;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.buffer.ChannelBuffer;
+
+public class XexunFrameDecoder extends FrameDecoder {
+
+    /**
+     * Find string in network buffer
+     */
+    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;
+    }
+
+    protected Object decode(
+            ChannelHandlerContext ctx,
+            Channel channel,
+            ChannelBuffer buf) throws Exception {
+
+        // Check minimum length
+        int length = buf.readableBytes();
+        if (length < 100) {
+            return null;
+        }
+
+        // Find start
+        Integer beginIndex = find(buf, 0, length, "GPRMC");
+        if (beginIndex == null) {
+            return null;
+        }
+
+        // Find identifier
+        Integer idIndex = find(buf, beginIndex, length, "imei:");
+        if (idIndex == null) {
+            return null;
+        }
+
+        // Find end
+        Integer endIndex = find(buf, idIndex, length, ",");
+        if (endIndex == null) {
+            return null;
+        }
+
+        // Read buffer
+        buf.skipBytes(beginIndex);
+        ChannelBuffer frame = buf.readBytes(endIndex - beginIndex + 1);
+
+        return frame;
+    }
+
+}
diff --git a/src/org/traccar/protocol/xexun/XexunProtocolDecoder.java b/src/org/traccar/protocol/xexun/XexunProtocolDecoder.java
new file mode 100644
index 000000000..872569e1a
--- /dev/null
+++ b/src/org/traccar/protocol/xexun/XexunProtocolDecoder.java
@@ -0,0 +1,175 @@
+/*
+ * Copyright 2010 Anton Tananaev (anton@tananaev.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 net.sourceforge.opentracking.protocol.xexun;
+
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+import java.text.ParseException;
+import java.util.TimeZone;
+import java.util.Timer;
+import java.util.TimerTask;
+import org.jboss.netty.channel.Channel;
+import org.jboss.netty.channel.ChannelHandlerContext;
+import org.jboss.netty.handler.codec.oneone.OneToOneDecoder;
+import net.sourceforge.opentracking.Position;
+import net.sourceforge.opentracking.DataManager;
+import org.jboss.netty.channel.ChannelEvent;
+import org.jboss.netty.channel.ChannelState;
+import org.jboss.netty.channel.ChannelStateEvent;
+
+/**
+ * Xexun tracker protocol decoder
+ */
+public class XexunProtocolDecoder extends OneToOneDecoder {
+
+    /**
+     * Data manager
+     */
+    private DataManager dataManager;
+
+    /**
+     * Reset connection delay
+     */
+    private Integer resetDelay;
+
+    /**
+     * Init device table
+     */
+    public XexunProtocolDecoder(DataManager dataManager, Integer resetDelay) {
+        this.dataManager = dataManager;
+        this.resetDelay = resetDelay;
+    }
+
+    /**
+     * Regular expressions pattern
+     */
+    static private Pattern pattern = Pattern.compile(
+            "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]+)," +                // Speed
+            "([\\d]+.[\\d]+)?," +               // Course
+            "([\\d]{2})([\\d]{2})([\\d]{2})," + // Date (DDMMYY)
+            ".*imei:" +
+            "([\\d]+),");                       // IMEI
+
+    /**
+     * 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()) {
+            throw new ParseException(null, 0);
+        }
+
+        // Create new position
+        Position position = new Position();
+
+        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);
+
+        // 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());
+
+        // Get device by IMEI
+        String imei = parser.group(index++);
+        position.setDeviceId(dataManager.getDeviceByImei(imei).getId());
+
+        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 DisconnectTask(evt.getChannel()), resetDelay);
+            }
+        }
+    }
+
+}