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.propagation.sampling; 18 19 import org.hipparchus.CalculusFieldElement; 20 import org.orekit.propagation.FieldSpacecraftState; 21 import org.orekit.time.FieldAbsoluteDate; 22 23 /** This interface is a space-dynamics aware step handler. 24 * 25 * <p>It mirrors the <code>StepHandler</code> interface from <a 26 * href="http://commons.apache.org/math/"> commons-math</a> but 27 * provides a space-dynamics interface to the methods.</p> 28 * @author Luc Maisonobe 29 * @param <T> type of the field elements 30 */ 31 public interface FieldOrekitStepHandler<T extends CalculusFieldElement<T>> { 32 33 /** Initialize step handler at the start of a propagation. 34 * <p> 35 * This method is called once at the start of the propagation. It 36 * may be used by the step handler to initialize some internal data 37 * if needed. 38 * </p> 39 * @param s0 initial state 40 * @param t target time for the integration 41 */ 42 default void init(FieldSpacecraftState<T> s0, FieldAbsoluteDate<T> t) { 43 // do nothing by default 44 } 45 46 /** Handle the current step. 47 * @param interpolator interpolator set up for the current step 48 */ 49 void handleStep(FieldOrekitStepInterpolator<T> interpolator); 50 51 /** 52 * Finalize propagation. 53 * @param finalState state at propagation end 54 * @since 11.0 55 */ 56 default void finish(FieldSpacecraftState<T> finalState) { 57 // nothing by default 58 } 59 60 }