Some code smell reduction (#202)

* Missing override
* Removed unused parameters
* Unused assignment
* Boolean literals redundant
* Unused import
* Catches combined
* Return redundant
* Missing override
* Removed unused parameters
* Unused assignment
* Boolean literals redundant
* Unused import
* Catches combined
* Return redundant

Author: matteobaccan

src/main/java/org/locationtech/spatial4j/distance/DistanceUtils.java

@@ -143,7 +143,7 @@ public static double[] vectorBoxCorner(double[] center, double[] result, double
     if (result == null || result.length != center.length) {
       result = new double[center.length];
     }
-    if (upperRight == false) {
+    if (!upperRight) {
       distance = -distance;
     }
     //We don't care about the power here,
@@ -269,7 +269,7 @@ public static Rectangle calcBoxByDistFromPtDEG(double lat, double lon, double di
           minY = -90;
       } else {
         //--calc longitude bounds
-        double lon_delta_deg = calcBoxByDistFromPt_deltaLonDEG(lat, lon, distDEG);
+        double lon_delta_deg = calcBoxByDistFromPt_deltaLonDEG(lat, distDEG);
 
         minX = normLonDEG(lon - lon_delta_deg);
         maxX = normLonDEG(lon + lon_delta_deg);
@@ -287,7 +287,7 @@ public static Rectangle calcBoxByDistFromPtDEG(double lat, double lon, double di
    * The delta longitude of a point-distance. In other words, half the width of
    * the bounding box of a circle.
    */
-  public static double calcBoxByDistFromPt_deltaLonDEG(double lat, double lon, double distDEG) {
+  public static double calcBoxByDistFromPt_deltaLonDEG(double lat, double distDEG) {
     //http://gis.stackexchange.com/questions/19221/find-tangent-point-on-circle-furthest-east-or-west
     if (distDEG == 0)
       return 0;

src/main/java/org/locationtech/spatial4j/io/GeoJSONReader.java

@@ -62,8 +62,7 @@ public Shape readIfSupported(Object value) throws InvalidShapeException {
     }
     try {
       return read(new StringReader(v));
-    } catch (IOException ex) {
-    } catch (ParseException e) {
+    } catch (IOException | ParseException ex) {
     }
     return null;
   }
@@ -114,7 +113,6 @@ protected void readCoordXYZ(JSONParser parser, ShapeFactory.PointsBuilder points
       }
       evt = parser.nextEvent();
     }
-    return;
   }
 
   protected void readCoordListXYZ(JSONParser parser, ShapeFactory.PointsBuilder pointsBuilder) throws IOException, ParseException {

src/main/java/org/locationtech/spatial4j/io/GeohashUtils.java

@@ -81,7 +81,7 @@ public static String encodeLatLon(double latitude, double longitude, int precisi
     int ch = 0;
 
     while (geohash.length() < precision) {
-      double mid = 0.0;
+      double mid;
       if (isEven) {
         mid = (lngInterval[0] + lngInterval[1]) / 2D;
         if (longitude > mid) {

src/main/java/org/locationtech/spatial4j/io/PolyshapeReader.java

@@ -30,7 +30,6 @@
 import org.locationtech.spatial4j.exception.InvalidShapeException;
 import org.locationtech.spatial4j.shape.Shape;
 import org.locationtech.spatial4j.shape.ShapeFactory;
-import org.locationtech.jts.geom.LinearRing;
 
 
 /**
@@ -62,8 +61,7 @@ public Shape readIfSupported(Object value) throws InvalidShapeException {
     if(first >= '0' && first <= '9') {
       try {
         return read(new StringReader(v));
-      } catch (ParseException e) {
-      } catch (IOException e) {
+      } catch (ParseException | IOException e) {
       }
     }
     return null;

src/main/java/org/locationtech/spatial4j/io/jts/JtsGeoJSONWriter.java

@@ -101,24 +101,20 @@ public void write(Writer output, Geometry geom) throws IOException {
       output.append("{\"type\":\"Point\",\"coordinates\":");
       write(output, nf, v.getCoordinate());
       output.append("}");
-      return;
     } else if (geom instanceof Polygon) {
       output.append("{\"type\":\"Polygon\",\"coordinates\":");
       write(output, nf, (Polygon) geom);
       output.append("}");
-      return;
     } else if (geom instanceof LineString) {
       LineString v = (LineString) geom;
       output.append("{\"type\":\"LineString\",\"coordinates\":");
       write(output, nf, v.getCoordinateSequence());
       output.append("}");
-      return;
     } else if (geom instanceof MultiPoint) {
       MultiPoint v = (MultiPoint) geom;
       output.append("{\"type\":\"MultiPoint\",\"coordinates\":");
       write(output, nf, v.getCoordinates());
       output.append("}");
-      return;
     } else if (geom instanceof MultiLineString) {
       MultiLineString v = (MultiLineString) geom;
       output.append("{\"type\":\"MultiLineString\",\"coordinates\":[");

src/main/java/org/locationtech/spatial4j/io/jts/JtsPolyshapeWriter.java

@@ -47,7 +47,7 @@ public JtsPolyshapeWriter(JtsSpatialContext ctx, SpatialContextFactory factory)
   // --------------------------------------------------------------
 
   protected void write(Encoder output, CoordinateSequence coordseq) throws IOException {
-    int dim = coordseq.getDimension();
+//    int dim = coordseq.getDimension();
 //    if(dim>2) {
 //      throw new IllegalArgumentException("only supports 2d geometry now ("+dim+")");
 //    }
@@ -77,20 +77,16 @@ public void write(Encoder output, Geometry geom) throws IOException {
       Point v = (Point) geom;
       output.write(PolyshapeWriter.KEY_POINT);
       write(output, v.getCoordinateSequence());
-      return;
     } else if (geom instanceof Polygon) {
       write(output, (Polygon) geom);
-      return;
     } else if (geom instanceof LineString) {
       LineString v = (LineString) geom;
       output.write(PolyshapeWriter.KEY_LINE);
       write(output, v.getCoordinateSequence());
-      return;
     } else if (geom instanceof MultiPoint) {
       MultiPoint v = (MultiPoint) geom;
       output.write(PolyshapeWriter.KEY_MULTIPOINT);
       write(output, v.getCoordinates());
-      return;
     } else if (geom instanceof GeometryCollection) {
       GeometryCollection v = (GeometryCollection) geom;
       for (int i = 0; i < v.getNumGeometries(); i++) {

src/main/java/org/locationtech/spatial4j/shape/impl/Range.java

@@ -128,6 +128,7 @@ public boolean crossesDateline() {
       return min > max;
     }
 
+    @Override
     public double getCenter() {
       double ctr = super.getCenter();
       if (ctr > 180)

src/main/java/org/locationtech/spatial4j/shape/impl/RectangleImpl.java

@@ -74,7 +74,7 @@ public Rectangle getBuffered(double distance, SpatialContext ctx) {
         double latDistance = distance;
         double closestToPoleY = Math.abs(maxY) > Math.abs(minY) ? maxY : minY;
         double lonDistance = DistanceUtils.calcBoxByDistFromPt_deltaLonDEG(
-            closestToPoleY, minX, distance);//lat,lon order
+            closestToPoleY, distance);//lat,lon order
         //could still wrap the world though...
         if (lonDistance * 2 + getWidth() >= 360)
           return ctx.makeRectangle(-180, 180, minY - latDistance, maxY + latDistance);