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.conversion;
18  
19  import org.hipparchus.CalculusFieldElement;
20  import org.hipparchus.Field;
21  import org.hipparchus.ode.AbstractFieldIntegrator;
22  import org.orekit.orbits.FieldCartesianOrbit;
23  import org.orekit.orbits.FieldOrbit;
24  import org.orekit.orbits.Orbit;
25  import org.orekit.orbits.OrbitType;
26  import org.orekit.orbits.PositionAngleType;
27  import org.orekit.utils.FieldAbsolutePVCoordinates;
28  import org.orekit.utils.TimeStampedFieldPVCoordinates;
29  
30  /**
31   * This abstract class implements some of the required methods for integrators in propagators conversion.
32  
33   * @author Vincent Cucchietti
34   * @author Romain Serra
35   * @since 13.0
36   * @param <T> type of the field elements
37   */
38  public abstract class FieldAbstractIntegratorBuilder<T extends CalculusFieldElement<T>, W extends AbstractFieldIntegrator<T>>
39          implements FieldODEIntegratorBuilder<T> {
40  
41      /** {@inheritDoc} */
42      @Override
43      public W buildIntegrator(final Field<T> field, final Orbit orbit, final OrbitType orbitType) {
44          return buildIntegrator(field, orbit, orbitType, PositionAngleType.MEAN);
45      }
46  
47      /** {@inheritDoc} */
48      public abstract W buildIntegrator(Field<T> field, Orbit orbit, OrbitType orbitType, PositionAngleType angleType);
49  
50      /** {@inheritDoc} */
51      @Override
52      public W buildIntegrator(final FieldOrbit<T> orbit, final OrbitType orbitType) {
53          return buildIntegrator(orbit.getA().getField(), orbit.toOrbit(), orbitType);
54      }
55  
56      /** {@inheritDoc} */
57      @Override
58      public W buildIntegrator(final FieldAbsolutePVCoordinates<T> fieldAbsolutePVCoordinates) {
59          final TimeStampedFieldPVCoordinates<T> fieldPVCoordinates = fieldAbsolutePVCoordinates.getPVCoordinates();
60          final FieldCartesianOrbit<T> fieldOrbit = new FieldCartesianOrbit<>(fieldPVCoordinates, fieldAbsolutePVCoordinates.getFrame(),
61                  fieldAbsolutePVCoordinates.getDate().getField().getOne());
62          return buildIntegrator(fieldOrbit, OrbitType.CARTESIAN);
63      }
64  }