package au.gov.amsa.geo.model;
   
   import java.io.Serializable;
   
   import au.gov.amsa.risky.format.HasPosition;
   
   public class Position implements HasPosition, Serializable {
   
       private static final long serialVersionUID = 4470547471465912154L;
  
      private final float lat, lon;
  
      private final int hashCode;
  
      public Position(float lat, float lon) {
          this.lat = lat;
          this.lon = lon;
          this.hashCode = calculateHashCode();
      }
  
      public Position(double lat, double lon) {
          this((float) lat, (float) lon);
      }
  
      @Override
      public float lat() {
          return lat;
      }
  
      @Override
      public float lon() {
          return lon;
      }
  
      @Override
      public String toString() {
          return "Position [lat=" + lat + ", lon=" + lon + "]";
      }
  
      @Override
      public int hashCode() {
          return hashCode;
      }
  
      private int calculateHashCode() {
          final int prime = 31;
          int result = 1;
          long temp;
          temp = Double.doubleToLongBits(lat);
          result = prime * result + (int) (temp ^ (temp >>> 32));
          temp = Double.doubleToLongBits(lon);
          result = prime * result + (int) (temp ^ (temp >>> 32));
          return result;
      }
  
      @Override
      public boolean equals(Object obj) {
          if (this == obj)
              return true;
          if (obj == null)
              return false;
          if (getClass() != obj.getClass())
              return false;
          Position other = (Position) obj;
          if (Double.doubleToLongBits(lat) != Double.doubleToLongBits(other.lat))
              return false;
          if (Double.doubleToLongBits(lon) != Double.doubleToLongBits(other.lon))
              return false;
          return true;
      }
  
  }