1   /* Copyright 2022-2025 Romain Serra
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.control.indirect.adjoint.cost;
18  
19  import org.hipparchus.CalculusFieldElement;
20  import org.orekit.propagation.events.FieldEventDetectionSettings;
21  import org.orekit.propagation.events.FieldEventDetector;
22  import org.orekit.propagation.events.handlers.FieldEventHandler;
23  import org.orekit.propagation.events.handlers.FieldResetDerivativesOnEvent;
24  
25  /**
26   * Abstract event detector for singularities in adjoint dynamics.
27   *
28   * @author Romain Serra
29   * @since 13.0
30   */
31  public abstract class FieldControlSwitchDetector<T extends CalculusFieldElement<T>> implements FieldEventDetector<T> {
32  
33      /** Event handler. */
34      private final FieldEventHandler<T> handler = new FieldResetDerivativesOnEvent<>();
35  
36      /** Event detection settings. */
37      private final FieldEventDetectionSettings<T> detectionSettings;
38  
39      /**
40       * Constructor.
41       * @param detectionSettings detection settings
42       */
43      protected FieldControlSwitchDetector(final FieldEventDetectionSettings<T> detectionSettings) {
44          this.detectionSettings = detectionSettings;
45      }
46  
47      @Override
48      public FieldEventDetectionSettings<T> getDetectionSettings() {
49          return detectionSettings;
50      }
51  
52      @Override
53      public FieldEventHandler<T> getHandler() {
54          return handler;
55      }
56  }