/** @methodtype set */
public SphericCoordinate setLongitude(double longitude) {
// precondition
assertIsValidLongitude(longitude);
SphericCoordinate result = getInstance(this.latitude, longitude, this.radius);
// postcondition
assertClassInvariants();
return result;
}
/** @methodtype constructor */
private SphericCoordinate(double latitude, double longitude, double radiusInKm) {
// preconditions
assertIsValidLatitude(latitude);
assertIsValidLongitude(longitude);
assertIsValidRadius(radiusInKm);
this.latitude = latitude;
this.longitude = longitude;
this.radius = radiusInKm;
// postconditions
assertClassInvariants();
}
/** @methodtype assertion */
protected void assertClassInvariants() {
super.assertClassInvariants();
assertIsValidLatitude(this.latitude);
assertIsValidLongitude(this.longitude);
assertIsValidRadius(this.radius);
}