diff options
Diffstat (limited to 'src/main/java/org/onap/a1pesimulator/util/DistanceCalculator.java')
-rw-r--r-- | src/main/java/org/onap/a1pesimulator/util/DistanceCalculator.java | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/main/java/org/onap/a1pesimulator/util/DistanceCalculator.java b/src/main/java/org/onap/a1pesimulator/util/DistanceCalculator.java new file mode 100644 index 0000000..e487ed3 --- /dev/null +++ b/src/main/java/org/onap/a1pesimulator/util/DistanceCalculator.java @@ -0,0 +1,46 @@ +/* + * Copyright (C) 2021 Samsung Electronics + * 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 org.onap.a1pesimulator.util; + +public class DistanceCalculator { + + private static final int EARTH_RADIUS = 6371; // Earth radius in KM + + private DistanceCalculator() { + } + + /** + * Calculate distance in KM using Haversine formula + */ + public static double calculate(double startLat, double startLong, double endLat, double endLong) { + return haversine(startLat, startLong, endLat, endLong); + } + + public static boolean isInRange(double startLat, double startLong, double endLat, double endLong, double range) { + double distance = calculate(startLat, startLong, endLat, endLong); + return distance < range; + } + + private static double haversine(double startLat, double startLong, double endLat, double endLong) { + double dLat = Math.toRadians(endLat - startLat); + double dLon = Math.toRadians(endLong - startLong); + double startLatInRadians = Math.toRadians(startLat); + double endLatInRadians = Math.toRadians(endLat); + + double a = Math.pow(Math.sin(dLat / 2), 2) + Math.pow(Math.sin(dLon / 2), 2) * Math.cos(startLatInRadians) + * Math.cos(endLatInRadians); + double c = 2 * Math.asin(Math.sqrt(a)); + return EARTH_RADIUS * c; + } +} |