org.springframework.data.geo.Metric Java Examples

/**
 * This method users Haversine formula to calculate the distance between two points
 * Formula is explained here - https://www.movable-type.co.uk/scripts/gis-faq-5.1.html
 * Sample Java code is here - https://rosettacode.org/wiki/Haversine_formula#Java
 * @param lat1 - Latitude of first point.
 * @param lng1 - Longitude of first point.
 * @param lat2 - Latitude of second point.
 * @param lng2 - Longitude of second point.
 * @param metric - metric to specify where its KILOMETERS, MILES or NEUTRAL
 * @return
 */
private double calculateDistance(double lat1, double lng1, double lat2, double lng2, Metric metric) {
    if ((lat1 == lat2) && (lng1 == lng2)) {
        return 0;
    } else {
        double dLat = Math.toRadians(lat2 - lat1);
        double dLon = Math.toRadians(lng2 - lng1);
        double lat1Radians = Math.toRadians(lat1);
        double lat2Radians = Math.toRadians(lat2);

        double a = Math.pow(Math.sin(dLat / 2), 2)
            + Math.pow(Math.sin(dLon / 2), 2) * Math.cos(lat1Radians) * Math.cos(lat2Radians);
        double c = 2 * Math.asin(Math.sqrt(a));
        double dist = R * c;

        if (Metrics.MILES.equals(metric)) {
            dist = dist * KM_TO_MILES;
        } else if (Metrics.NEUTRAL.equals(metric)) {
            dist = dist * KM_TO_NEUTRAL;
        }

        return dist;
    }
}
 

@Override
public Distance geoDist(byte[] key, byte[] member1, byte[] member2, Metric metric) {
  return helper.doInScope(RedisCommand.GEODIST, key,
      () -> connection.geoDist(key, member1, member2, metric));
}
 

@Override
public Distance geoDist(byte[] key, byte[] member1, byte[] member2, Metric metric) {
  return helper.doInScope(RedisCommand.GEODIST, key,
      () -> connection.geoDist(key, member1, member2, metric));
}
 

@Override
public Distance geoDist(byte[] key, byte[] member1, byte[] member2, Metric metric) {
    return read(key, DoubleCodec.INSTANCE, new RedisCommand<Distance>("GEODIST", new DistanceConvertor(metric)), key, member1, member2, metric.getAbbreviation());
}
 

public DistanceConvertor(Metric metric) {
    super();
    this.metric = metric;
}
 

public DistanceConvertor(Metric metric) {
    super();
    this.metric = metric;
}
 

@Override
public Distance geoDist(byte[] key, byte[] member1, byte[] member2, Metric metric) {
    return read(key, DoubleCodec.INSTANCE, new RedisCommand<Distance>("GEODIST", new DistanceConvertor(metric)), key, member1, member2, metric.getAbbreviation());
}
 

public DistanceConvertor(Metric metric) {
    super();
    this.metric = metric;
}
 

@Override
public Distance geoDist(byte[] key, byte[] member1, byte[] member2, Metric metric) {
    return read(key, DoubleCodec.INSTANCE, new RedisCommand<Distance>("GEODIST", new DistanceConvertor(metric)), key, member1, member2, metric.getAbbreviation());
}
 

public DistanceConvertor(Metric metric) {
    super();
    this.metric = metric;
}
 

@Override
public Distance geoDist(byte[] key, byte[] member1, byte[] member2, Metric metric) {
    return read(key, DoubleCodec.INSTANCE, new RedisCommand<Distance>("GEODIST", new DistanceConvertor(metric)), key, member1, member2, metric.getAbbreviation());
}
 

public DistanceConvertor(Metric metric) {
    super();
    this.metric = metric;
}
 

public DistanceConvertor(Metric metric) {
    super();
    this.metric = metric;
}