1   /* Copyright 2002-2025 CS GROUP
2    * Licensed to CS GROUP (CS) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * CS licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *   http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.orekit.estimation.leastsquares;
18  
19  import java.util.Map;
20  
21  import org.orekit.estimation.measurements.EstimatedMeasurement;
22  import org.orekit.estimation.measurements.ObservedMeasurement;
23  import org.orekit.orbits.Orbit;
24  
25  /** Observer for {@link BatchLSModel model} calls.
26   * <p>
27   * This interface is an internal one intended to pass the orbit
28   * back from {@link BatchLSModel model} to {@link BatchLSEstimator estimator}.
29   * </p>
30   * @author Luc Maisonobe
31   * @since 8.0
32   */
33  @FunctionalInterface
34  public interface ModelObserver {
35  
36      /** Notification callback for orbit changes.
37       * @param orbits current estimated orbits
38       * @param estimations map of measurements estimations resulting from
39       * the current estimated orbit (this is an unmodifiable view of the
40       * current estimations, its content is changed at each iteration)
41       */
42      void modelCalled(Orbit[] orbits, Map<ObservedMeasurement<?>, EstimatedMeasurement<?>> estimations);
43  
44  }