DATAMONGO-1607 - Fix ClassCastException in Circle, Point and Sphere when coordinates are not Double.

Original Pull Request: #438

Author: thiagodsti

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/convert/GeoConverters.java

@@ -53,6 +53,7 @@
  * @author Thomas Darimont
  * @author Oliver Gierke
  * @author Christoph Strobl
+ * @author Thiago Diniz da Silveira
  * @since 1.5
  */
 abstract class GeoConverters {
@@ -120,8 +121,11 @@ public Point convert(DBObject source) {
 			if (source.containsField("type")) {
 				return DbObjectToGeoJsonPointConverter.INSTANCE.convert(source);
 			}
+			
+			Number x = (Number) source.get("x");
+			Number y = (Number) source.get("y");
 
-			return new Point((Double) source.get("x"), (Double) source.get("y"));
+			return new Point(x.doubleValue(), y.doubleValue());
 		}
 	}
 
@@ -255,7 +259,8 @@ public Circle convert(DBObject source) {
 			}
 
 			DBObject center = (DBObject) source.get("center");
-			Double radius = (Double) source.get("radius");
+			Number radiusNumber = (Number) source.get("radius");
+			Double radius = radiusNumber.doubleValue();
 
 			Distance distance = new Distance(radius);
 
@@ -326,7 +331,9 @@ public Sphere convert(DBObject source) {
 			}
 
 			DBObject center = (DBObject) source.get("center");
-			Double radius = (Double) source.get("radius");
+			Number radiusNumber = (Number) source.get("radius");
+			Double radius = radiusNumber.doubleValue();
+
 
 			Distance distance = new Distance(radius);