Examples with GeoHash com.firebase.geofire.core.GeoHash used on opensource projects

Example 1 with GeoHash

use of com.firebase.geofire.core.GeoHash in project geofire-java by firebase.

the class GeoHashQueryTest method pointsInGeoHash.

@Test
public void pointsInGeoHash() {
    for (int i = 0; i < 1000; i++) {
        double centerLat = Math.random() * 160 - 80;
        double centerLong = Math.random() * 360 - 180;
        double radius = Math.random() * 100000;
        double radiusDegrees = GeoUtils.distanceToLatitudeDegrees(radius);
        Set<GeoHashQuery> queries = GeoHashQuery.queriesAtLocation(new GeoLocation(centerLat, centerLong), radius);
        for (int j = 0; j < 1000; j++) {
            double pointLat = Math.max(-89.9, Math.min(89.9, centerLat + Math.random() * radiusDegrees));
            double pointLong = GeoUtils.wrapLongitude(centerLong + Math.random() * radiusDegrees);
            if (GeoUtils.distance(centerLat, centerLong, pointLat, pointLong) < radius) {
                GeoHash geoHash = new GeoHash(pointLat, pointLong);
                boolean inQuery = false;
                for (GeoHashQuery query : queries) {
                    if (query.containsGeoHash(geoHash)) {
                        inQuery = true;
                    }
                }
                Assert.assertTrue(inQuery);
            }
        }
    }
}

Example 2 with GeoHash

use of com.firebase.geofire.core.GeoHash in project geofire-java by firebase.

the class GeoFire method setLocation.

/**
 * Sets the location for a given key.
 *
 * @param key                The key to save the location for
 * @param location           The location of this key
 * @param completionListener A listener that is called once the location was successfully saved on the server or an
 *                           error occurred
 */
public void setLocation(final String key, final GeoLocation location, final CompletionListener completionListener) {
    if (key == null) {
        throw new NullPointerException();
    }
    DatabaseReference keyRef = this.getDatabaseRefForKey(key);
    GeoHash geoHash = new GeoHash(location);
    Map<String, Object> updates = new HashMap<>();
    updates.put("g", geoHash.getGeoHashString());
    updates.put("l", Arrays.asList(location.latitude, location.longitude));
    if (completionListener != null) {
        keyRef.setValue(updates, geoHash.getGeoHashString(), new DatabaseReference.CompletionListener() {

            @Override
            public void onComplete(DatabaseError databaseError, DatabaseReference databaseReference) {
                completionListener.onComplete(key, databaseError);
            }
        });
    } else {
        keyRef.setValue(updates, geoHash.getGeoHashString());
    }
}

Example 3 with GeoHash

use of com.firebase.geofire.core.GeoHash in project geofire-java by firebase.

the class GeoQuery method childRemoved.

private void childRemoved(DataSnapshot dataSnapshot) {
    final String key = dataSnapshot.getKey();
    final LocationInfo info = this.locationInfos.get(key);
    if (info != null) {
        this.geoFire.getDatabaseRefForKey(key).addListenerForSingleValueEvent(new ValueEventListener() {

            @Override
            public void onDataChange(final DataSnapshot dataSnapshot) {
                synchronized (GeoQuery.this) {
                    GeoLocation location = GeoFire.getLocationValue(dataSnapshot);
                    GeoHash hash = (location != null) ? new GeoHash(location) : null;
                    if (hash == null || !GeoQuery.this.geoHashQueriesContainGeoHash(hash)) {
                        final LocationInfo info = locationInfos.remove(key);
                        if (info != null && info.inGeoQuery) {
                            for (final GeoQueryDataEventListener listener : GeoQuery.this.eventListeners) {
                                GeoQuery.this.geoFire.raiseEvent(new Runnable() {

                                    @Override
                                    public void run() {
                                        listener.onDataExited(info.dataSnapshot);
                                    }
                                });
                            }
                        }
                    }
                }
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {
            // tough luck
            }
        });
    }
}

Example 4 with GeoHash

use of com.firebase.geofire.core.GeoHash in project geofire-java by firebase.

the class GeoHashQueryTest method queryForGeoHash.

@Test
public void queryForGeoHash() {
    Assert.assertEquals(new GeoHashQuery("60", "6h"), GeoHashQuery.queryForGeoHash(new GeoHash("64m9yn96mx"), 6));
    Assert.assertEquals(new GeoHashQuery("0", "h"), GeoHashQuery.queryForGeoHash(new GeoHash("64m9yn96mx"), 1));
    Assert.assertEquals(new GeoHashQuery("64", "65"), GeoHashQuery.queryForGeoHash(new GeoHash("64m9yn96mx"), 10));
    Assert.assertEquals(new GeoHashQuery("640", "64h"), GeoHashQuery.queryForGeoHash(new GeoHash("6409yn96mx"), 11));
    Assert.assertEquals(new GeoHashQuery("64h", "64~"), GeoHashQuery.queryForGeoHash(new GeoHash("64m9yn96mx"), 11));
    Assert.assertEquals(new GeoHashQuery("6", "6~"), GeoHashQuery.queryForGeoHash(new GeoHash("6"), 10));
    Assert.assertEquals(new GeoHashQuery("64s", "64~"), GeoHashQuery.queryForGeoHash(new GeoHash("64z178"), 12));
    Assert.assertEquals(new GeoHashQuery("64z", "64~"), GeoHashQuery.queryForGeoHash(new GeoHash("64z178"), 15));
}

Example 5 with GeoHash

use of com.firebase.geofire.core.GeoHash in project geofire-java by firebase.

the class GeoHashTest method customPrecision.

@Test
public void customPrecision() {
    Assert.assertEquals(new GeoHash("000000"), new GeoHash(-90, -180, 6));
    Assert.assertEquals(new GeoHash("zzzzzzzzzzzzzzzzzzzz"), new GeoHash(90, 180, 20));
    Assert.assertEquals(new GeoHash("p"), new GeoHash(-90, 180, 1));
    Assert.assertEquals(new GeoHash("bpbpb"), new GeoHash(90, -180, 5));
    Assert.assertEquals(new GeoHash("9q8yywe5"), new GeoHash(37.7853074, -122.4054274, 8));
    Assert.assertEquals(new GeoHash("dqcjf17sy6cppp8vfn"), new GeoHash(38.98719, -77.250783, 18));
    Assert.assertEquals(new GeoHash("tj4p5gerfzqu"), new GeoHash(29.3760648, 47.9818853, 12));
    Assert.assertEquals(new GeoHash("u"), new GeoHash(78.216667, 15.55, 1));
    Assert.assertEquals(new GeoHash("4qpzmre"), new GeoHash(-54.933333, -67.616667, 7));
    Assert.assertEquals(new GeoHash("4w2kg3s54"), new GeoHash(-54, -67, 9));
}