Changeset 21622 in osm for applications

Timestamp:

2010-06-09T15:21:27+02:00 (14 years ago)

Author:

stoecker

Message:

fixes by Gleb Smirnoff

Location:

applications/editors/josm/plugins/livegps/src

Files:

• livegps/LiveGpsAcquirer.java (modified) (6 diffs)
• org (added)
• org/json (added)
• org/json/JSONArray.java (added)
• org/json/JSONException.java (added)
• org/json/JSONObject.java (added)
• org/json/JSONString.java (added)
• org/json/JSONTokener.java (added)

applications/editors/josm/plugins/livegps/src/livegps/LiveGpsAcquirer.java

@@ -2 +2 @@
 
 import static org.openstreetmap.josm.tools.I18n.tr;
+
+import java.lang.Float;
 
 import java.beans.PropertyChangeEvent;
@@ -16 +18 @@
 import org.openstreetmap.josm.data.coor.LatLon;
 
+import org.json.JSONObject;
+import org.json.JSONException;
+
 public class LiveGpsAcquirer implements Runnable {
-        Socket gpsdSocket;
-        BufferedReader gpsdReader;
-        boolean connected = false;
-        String gpsdHost;
-        int gpsdPort;
-        boolean shutdownFlag = false;
+        private String gpsdHost;
+        private int gpsdPort;
+
+        private Socket gpsdSocket;
+        private BufferedReader gpsdReader;
+        private boolean connected = false;
+        private boolean shutdownFlag = false;
+        private boolean JSONProtocol = true;
+
         private final List<PropertyChangeListener> propertyChangeListener = new ArrayList<PropertyChangeListener>();
         private PropertyChangeEvent lastStatusEvent;
@@ -112 +120 @@
                 shutdownFlag = false;
                 while (!shutdownFlag) {
-                        double lat = 0;
-                        double lon = 0;
-                        float speed = 0;
-                        float course = 0;
-                        boolean haveFix = false;
 
                         try {
-                                if (!connected) {
-                                        System.out.println("LiveGps tries to connect to gpsd");
-                                        fireGpsStatusChangeEvent(
-                                                        LiveGpsStatus.GpsStatus.CONNECTING,
-                                                        tr("Connecting"));
-                                        InetAddress[] addrs = InetAddress.getAllByName(gpsdHost);
-                                        for (int i = 0; i < addrs.length && gpsdSocket == null; i++) {
-                                                try {
-                                                        gpsdSocket = new Socket(addrs[i], gpsdPort);
-                                                        break;
-                                                } catch (Exception e) {
-                                                        System.out
-                                                                        .println("LiveGps: Could not open connection to gpsd: "
-                                                                                        + e);
-                                                        gpsdSocket = null;
-                                                }
-                                        }
-
-                                        if (gpsdSocket != null) {
-                                                gpsdReader = new BufferedReader(new InputStreamReader(
-                                                                gpsdSocket.getInputStream()));
-                                                gpsdSocket.getOutputStream().write(
-                                                                new byte[] { 'w', 13, 10 });
-                                                fireGpsStatusChangeEvent(
-                                                                LiveGpsStatus.GpsStatus.CONNECTING,
-                                                                tr("Connecting"));
-                                                connected = true;
-                                                System.out.println("LiveGps: Connected to gpsd");
-                                        }
-                                }
+                                if (!connected)
+                                        connect();
 
                                 if (connected) {
+                                        String line;
+
                                         // <FIXXME date="23.06.2007" author="cdaller">
                                         // TODO this read is blocking if gps is connected but has no
                                         // fix, so gpsd does not send positions
-                                        String line = gpsdReader.readLine();
+                                        line = gpsdReader.readLine();
                                         // </FIXXME>
                                         if (line == null)
                                                 break;
-                                        String words[] = line.split(",");
-
-                                        if ((words.length == 0) || (!words[0].equals("GPSD"))) {
-                                                // unexpected response.
+
+                                        if (JSONProtocol == true)
+                                                gpsData = ParseJSON(line);
+                                        else
+                                                gpsData = ParseOld(line);
+
+                                        if (gpsData == null)
                                                 continue;
-                                        }
-
-                                        for (int i = 1; i < words.length; i++) {
-
-                                                if ((words[i].length() < 2)
-                                                                || (words[i].charAt(1) != '=')) {
-                                                        // unexpected response.
-                                                        continue;
-                                                }
-
-                                                char what = words[i].charAt(0);
-                                                String value = words[i].substring(2);
-                                                oldGpsData = gpsData;
-                                                gpsData = new LiveGpsData();
-                                                switch (what) {
-                                                case 'O':
-                                                        // full report, tab delimited.
-                                                        String[] status = value.split("\\s+");
-                                                        if (status.length >= 5) {
-                                                                lat = Double.parseDouble(status[3]);
-                                                                lon = Double.parseDouble(status[4]);
-                                                                try {
-                                                                        speed = Float.parseFloat(status[9]);
-                                                                        course = Float.parseFloat(status[8]);
-                                                                        // view.setSpeed(speed);
-                                                                        // view.setCourse(course);
-                                                                } catch (NumberFormatException nex) {
-                                                                }
-                                                                haveFix = true;
-                                                        }
-                                                        break;
-                                                case 'P':
-                                                        // position report, tab delimited.
-                                                        String[] pos = value.split("\\s+");
-                                                        if (pos.length >= 2) {
-                                                                lat = Double.parseDouble(pos[0]);
-                                                                lon = Double.parseDouble(pos[1]);
-                                                                speed = Float.NaN;
-                                                                course = Float.NaN;
-                                                                haveFix = true;
-                                                        }
-                                                        break;
-                                                default:
-                                                        // not interested
-                                                }
-                                                fireGpsStatusChangeEvent(
-                                                                LiveGpsStatus.GpsStatus.CONNECTED,
-                                                                tr("Connected"));
-                                                gpsData.setFix(haveFix);
-                                                if (haveFix) {
-                                                        // view.setCurrentPosition(lat, lon);
-                                                        gpsData.setLatLon(new LatLon(lat, lon));
-                                                        gpsData.setSpeed(speed);
-                                                        gpsData.setCourse(course);
-                                                        fireGpsDataChangeEvent(oldGpsData, gpsData);
-                                                }
-                                        }
+
+                                        fireGpsDataChangeEvent(oldGpsData, gpsData);
+                                        oldGpsData = gpsData;
                                 } else {
-                                        // not connected:
-                                        fireGpsStatusChangeEvent(
-                                                        LiveGpsStatus.GpsStatus.DISCONNECTED,
-                                                        tr("Not connected"));
+                                        fireGpsStatusChangeEvent(LiveGpsStatus.GpsStatus.DISCONNECTED, tr("Not connected"));
                                         try {
                                                 Thread.sleep(1000);
-                                        } catch (InterruptedException ignore) {
-                                        }
-                                        ;
+                                        } catch (InterruptedException ignore) {}
                                 }
                         } catch (IOException iox) {
@@ -242 +163 @@
                                 try {
                                         Thread.sleep(1000);
-                                } catch (InterruptedException ignore) {
-                                }
-                                ;
+                                } catch (InterruptedException ignore) {} ;
                                 // send warning to layer
-
                         }
                 }
@@ -258 +176 @@
                                 System.out.println("LiveGps: Disconnected from gpsd");
                         } catch (Exception e) {
-                                System.out
-                                                .println("LiveGps: Unable to close socket; reconnection may not be possible");
+                                System.out.println("LiveGps: Unable to close socket; reconnection may not be possible");
                         }
                 }
@@ -268 +185 @@
         }
 
+        private void connect() throws IOException {
+                JSONObject greeting;
+                String line, type, release;
+
+                System.out.println("LiveGps: trying to connect to gpsd at " + gpsdHost + ":" + gpsdPort);
+                fireGpsStatusChangeEvent( LiveGpsStatus.GpsStatus.CONNECTING, tr("Connecting"));
+
+                InetAddress[] addrs = InetAddress.getAllByName(gpsdHost);
+                for (int i = 0; i < addrs.length && gpsdSocket == null; i++) {
+                        try {
+                                gpsdSocket = new Socket(addrs[i], gpsdPort);
+                                break;
+                        } catch (Exception e) {
+                                System.out.println("LiveGps: Could not open connection to gpsd: " + e);
+                                gpsdSocket = null;
+                        }
+                }
+
+                if (gpsdSocket == null)
+                        return;
+
+                fireGpsStatusChangeEvent(LiveGpsStatus.GpsStatus.CONNECTING, tr("Connecting"));
+
+                /*
+                 * First emit the "w" symbol. The older version will activate, the newer one will ignore it.
+                 */
+                gpsdSocket.getOutputStream().write(new byte[] { 'w', 13, 10 });
+
+                gpsdReader = new BufferedReader(new InputStreamReader(gpsdSocket.getInputStream()));
+                line = gpsdReader.readLine();
+                if (line == null)
+                        return;
+
+                try {
+                        greeting = new JSONObject(line);
+                        type = greeting.getString("class");
+                        if (type.equals("VERSION")) {
+                                release = greeting.getString("release");
+                                System.out.println("LiveGps: Connected to gpsd " + release);
+                        } else
+                                System.out.println("LiveGps: Unexpected JSON in gpsd greeting: " + line);
+                } catch (JSONException jex) {
+                        if (line.startsWith("GPSD,")) {
+                                connected = true;
+                                JSONProtocol = false;
+                                System.out.println("LiveGps: Connected to old gpsd protocol version.");
+                                fireGpsStatusChangeEvent(LiveGpsStatus.GpsStatus.CONNECTED, tr("Connected"));
+                        }
+                }
+
+                if (JSONProtocol == true) {
+                        JSONObject Watch = new JSONObject();
+                        try { 
+                                Watch.put("enable", true);
+                                Watch.put("json", true);
+                        } catch (JSONException je) {};
+
+                        String Request = "?WATCH=" + Watch.toString() + ";\n";
+                        gpsdSocket.getOutputStream().write(Request.getBytes());
+
+                        connected = true;
+                        fireGpsStatusChangeEvent(LiveGpsStatus.GpsStatus.CONNECTED, tr("Connected"));
+                }
+        }
+
+        private LiveGpsData ParseJSON(String line) {
+                JSONObject report;
+                String type;
+                double lat = 0;
+                double lon = 0;
+                float speed = 0;
+                float course = 0;
+
+                try {
+                        report = new JSONObject(line);
+                        type = report.getString("class");
+                } catch (JSONException jex) {
+                        System.out.println("LiveGps: line read from gpsd is not a JSON object:" + line);
+                        return null;
+                }
+                if (!type.equals("TPV"))
+                        return null;
+
+                try {
+                        lat = report.getDouble("lat");
+                        lon = report.getDouble("lon");
+                        speed = (new Float(report.getDouble("speed"))).floatValue();
+                        course = (new Float(report.getDouble("track"))).floatValue();
+
+                        return new LiveGpsData(lat, lon, course, speed, true);
+                } catch (JSONException je) {}
+
+                return null;
+        }
+
+        private LiveGpsData ParseOld(String line) {
+                String words[];
+                double lat = 0;
+                double lon = 0;
+                float speed = 0;
+                float course = 0;
+
+                words = line.split(",");
+                if ((words.length == 0) || (!words[0].equals("GPSD")))
+                        return null;
+
+                for (int i = 1; i < words.length; i++) {
+                        if ((words[i].length() < 2) || (words[i].charAt(1) != '=')) {
+                                // unexpected response.
+                                continue;
+                        }
+
+                        char what = words[i].charAt(0);
+                        String value = words[i].substring(2);
+                        switch (what) {
+                        case 'O':
+                                // full report, tab delimited.
+                                String[] status = value.split("\\s+");
+                                if (status.length >= 5) {
+                                        lat = Double.parseDouble(status[3]);
+                                        lon = Double.parseDouble(status[4]);
+                                        try {
+                                                speed = Float.parseFloat(status[9]);
+                                                course = Float.parseFloat(status[8]);
+                                        } catch (NumberFormatException nex) {}
+                                        return new LiveGpsData(lat, lon, course, speed, true);
+                                }
+                                break;
+                        case 'P':
+                                // position report, tab delimited.
+                                String[] pos = value.split("\\s+");
+                                if (pos.length >= 2) {
+                                        lat = Double.parseDouble(pos[0]);
+                                        lon = Double.parseDouble(pos[1]);
+                                        speed = Float.NaN;
+                                        course = Float.NaN;
+                                        return new LiveGpsData(lat, lon, course, speed, true);
+                                }
+                                break;
+                        default:
+                                // not interested
+                        }
+                }
+
+                return null;
+        }
 }