EventUsingEventDetector 4.5.1

<syntaxhighlight lang="java"> public class EventUsingEventDetector implements EventDetector {

   private static final long serialVersionUID = 1L;
   private final AbsoluteDate date;
   
   /**
    * Constructor
    * @param date absolute date when event will occured.
    */
   public EventUsingEventDetector( final AbsoluteDate date ) {
       this.date = date;
   }

   public Action eventOccurred(SpacecraftState s, boolean increasing,
           boolean forward) throws PatriusException {
       return EventDetector.Action.STOP;
   }

   public double g(SpacecraftState s) throws PatriusException {
       return s.getDate().durationFrom(date);
   }

   public double getMaxCheckInterval() {
       return AbstractDetector.DEFAULT_MAXCHECK;
   }

   public int getMaxIterationCount() {
       return 20;
   }

   public int getSlopeSelection() {
       // TODO Auto-generated method stub
       return AbstractDetector.INCREASING_DECREASING;
   }

   public double getThreshold() {
       return AbstractDetector.DEFAULT_THRESHOLD;
   }

   public void init(SpacecraftState s0, AbsoluteDate t) {
       // Nothing specific to do ...
   }

   public SpacecraftState resetState(SpacecraftState oldState)
           throws PatriusException {
       return oldState;
   }

   public boolean shouldBeRemoved() {
       return false;
   }
   
   @Override
   public EventDetector copy() {
       final AbsoluteDate newDate = new AbsoluteDate(date, 0.);
       return new EventUsingEventDetector(newDate);
   }

   /**
    * @param args
    * @throws PatriusException 
    * @throws URISyntaxException 
    * @throws IOException 
    */
   public static void main(String[] args) throws PatriusException, IOException, URISyntaxException {

       // Patrius Dataset initialization (needed for example to get the UTC time)
       PatriusDataset.addResourcesFromPatriusDataset() ;

       // Recovery of the UTC time scale using a "factory" (not to duplicate such unique object)
       final TimeScale TUC = TimeScalesFactory.getUTC();
       
       // Date of the orbit (given in UTC time scale)
       final AbsoluteDate date = new AbsoluteDate("2010-01-01T12:00:00.000", TUC);

       EventUsingEventDetector event = new EventUsingEventDetector(date);
       
       System.out.println("Max check interval of the event: " + event.getMaxCheckInterval() + " s");
       System.out.println("Threshold of the event: " + event.getThreshold() + " s");
       System.out.println("Remove the event after occuring: " + event.shouldBeRemoved());
       
   }

} <syntaxhighlight>