TrajectoryStateHistory.java
- /* Copyright 2002-2022 CS GROUP
- * Licensed to CS GROUP (CS) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * CS licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package org.orekit.files.ccsds.ndm.odm.ocm;
- import java.util.Collections;
- import java.util.List;
- import java.util.stream.Collectors;
- import org.orekit.errors.OrekitException;
- import org.orekit.errors.OrekitMessages;
- import org.orekit.files.general.EphemerisFile;
- import org.orekit.frames.Frame;
- import org.orekit.time.AbsoluteDate;
- import org.orekit.utils.CartesianDerivativesFilter;
- import org.orekit.utils.TimeStampedPVCoordinates;
- /** Trajectory state history.
- * @author Luc Maisonobe
- * @since 11.0
- */
- public class TrajectoryStateHistory implements EphemerisFile.EphemerisSegment<TimeStampedPVCoordinates> {
- /** Metadata. */
- private final TrajectoryStateHistoryMetadata metadata;
- /** Trajectory states. */
- private final List<TrajectoryState> states;
- /** Gravitational parameter in m³/s². */
- private final double mu;
- /** Simple constructor.
- * @param metadata metadata
- * @param states orbital states
- * @param mu gravitational parameter in m³/s²
- */
- TrajectoryStateHistory(final TrajectoryStateHistoryMetadata metadata,
- final List<TrajectoryState> states,
- final double mu) {
- this.metadata = metadata;
- this.states = states;
- this.mu = mu;
- }
- /** Get metadata.
- * @return metadata
- */
- public TrajectoryStateHistoryMetadata getMetadata() {
- return metadata;
- }
- /** Get the trajectory states.
- * @return trajectory states
- */
- public List<TrajectoryState> getTrajectoryStates() {
- return Collections.unmodifiableList(states);
- }
- /** {@inheritDoc} */
- @Override
- public double getMu() {
- return mu;
- }
- /** {@inheritDoc} */
- @Override
- public Frame getFrame() {
- final Frame frame = metadata.getTrajReferenceFrame().asFrame();
- if (frame == null) {
- throw new OrekitException(OrekitMessages.CCSDS_INVALID_FRAME,
- metadata.getTrajReferenceFrame().getName());
- }
- return frame;
- }
- /** {@inheritDoc} */
- @Override
- public int getInterpolationSamples() {
- return metadata.getInterpolationDegree() + 1;
- }
- /** {@inheritDoc} */
- @Override
- public CartesianDerivativesFilter getAvailableDerivatives() {
- return states.get(0).getAvailableDerivatives();
- }
- /** {@inheritDoc} */
- @Override
- public AbsoluteDate getStart() {
- return states.get(0).getDate();
- }
- /** {@inheritDoc} */
- @Override
- public AbsoluteDate getStop() {
- return states.get(states.size() - 1).getDate();
- }
- /** {@inheritDoc} */
- @Override
- public List<TimeStampedPVCoordinates> getCoordinates() {
- return states.stream().map(os -> os.toCartesian(mu)).collect(Collectors.toList());
- }
- }