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.propagation.sampling; 18 19 import org.orekit.propagation.SpacecraftState; 20 import org.orekit.time.AbsoluteDate; 21 22 import java.util.ArrayList; 23 import java.util.List; 24 25 /** 26 * Step handler recording states. 27 * Automatically clears them at start of propagation. 28 * 29 * @author Romain Serra 30 * @since 13.0 31 */ 32 public class PropagationStepRecorder implements OrekitStepHandler { 33 34 /** 35 * Recorded times. 36 */ 37 private final List<SpacecraftState> states; 38 39 /** 40 * Constructor. 41 */ 42 public PropagationStepRecorder() { 43 this.states = new ArrayList<>(); 44 } 45 46 /** 47 * Copy the current saved steps. 48 * @return copy of steps 49 */ 50 public List<SpacecraftState> copyStates() { 51 return new ArrayList<>(states); 52 } 53 54 /** {@inheritDoc} */ 55 @Override 56 public void init(final SpacecraftState s0, final AbsoluteDate t) { 57 OrekitStepHandler.super.init(s0, t); 58 states.clear(); 59 } 60 61 /** {@inheritDoc} */ 62 @Override 63 public void handleStep(final OrekitStepInterpolator interpolator) { 64 states.add(interpolator.getCurrentState()); 65 } 66 }