/*
   Define the credentials for the service call. SpaceTrack Client includes the `DefaultCredentialProvider`
   class which takes and stores the credentials as simple strings. If a different implementation is
   required (e.g. store an encrypted password), just implement the `CredentialProvider` interface and pass
   that to the query instead. The implementation can be anything as long as it can provide the credentials
   as they should be passed to Space-Track.org.
*/
CredentialProvider credentials = new DefaultCredentialProvider("user", "password");


/*
   Query for the International Space Station's satellite record (catalog number 25544). Start by
   instantiating the query class that represents Space-Track.org's "request class" (SatCatQuery, TleQuery,
   etc.). Next, set the credential object on the query. Then set any predicates, limits, sorting, etc. that
   define how the query functions. In this example, the query is searching for the satellite whose catalog
   number is equal to 25544. Finally, call the `execute()` method to run the query and return results as
   deserialized data model objects.
*/
List<SatCat> results = new SatCatQuery().setCredentials(credentials)
  .addPredicate(new Equal<>(SatCatQueryField.CATALOG_NUMBER, 25544)).execute();


/*
   Print out the apogee height
*/
SatCat internationalSpaceStation = results.get(0);

if (internationalSpaceStation.getApogeeHeightKilometers().isPresent()) {

  long apogeeHeightKm = internationalSpaceStation.getApogeeHeightKilometers().get();
  System.out.println("The International Space Station's apogee height is: " + apogeeHeightKm + " km");

} else {

  System.out.println("The International Space Station's apogee height is: unknown");
}