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  
18  package org.orekit.propagation.events.handlers;
19  
20  
21  import org.hipparchus.CalculusFieldElement;
22  import org.hipparchus.ode.events.Action;
23  import org.orekit.propagation.FieldSpacecraftState;
24  import org.orekit.propagation.events.FieldEventDetector;
25  
26  
27  /**
28   * Event handler which will always return {@link Action#RESET_DERIVATIVES continue} as a state.
29   * @author Romain Serra
30   *
31   * @param <T> type of the field element
32   * @since 12.2
33   */
34  public class FieldResetDerivativesOnEvent<T extends CalculusFieldElement<T>> implements FieldEventHandler<T> {
35  
36      /**
37       * Specific implementation of the eventOccurred interface.
38       *
39       * @param s SpaceCraft state to be used in the evaluation
40       * @param detector object with appropriate type that can be used in determining correct return state
41       * @param increasing with the event occurred in an "increasing" or "decreasing" slope direction
42       * @return {@link Action#RESET_DERIVATIVES stop} under all circumstances
43       */
44      @Override
45      public Action eventOccurred(final FieldSpacecraftState<T> s, final FieldEventDetector<T> detector, final boolean increasing) {
46          return Action.RESET_DERIVATIVES;
47      }
48  
49  }