1   /* Copyright 2002-2024 CS GROUP
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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
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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
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17  package org.orekit.propagation.conversion;
18  
19  import org.hipparchus.ode.AbstractIntegrator;
20  import org.hipparchus.ode.nonstiff.AdamsMoultonIntegrator;
21  import org.orekit.orbits.Orbit;
22  import org.orekit.orbits.OrbitType;
23  import org.orekit.propagation.numerical.NumericalPropagator;
24  
25  /** Builder for AdamsMoultonIntegrator.
26   * @author Pascal Parraud
27   * @since 6.0
28   */
29  public class AdamsMoultonIntegratorBuilder implements ODEIntegratorBuilder {
30  
31      /** Number of steps. */
32      private final int nSteps;
33  
34      /** Minimum step size (s). */
35      private final double minStep;
36  
37      /** Maximum step size (s). */
38      private final double maxStep;
39  
40      /** Minimum step size (s). */
41      private final double dP;
42  
43      /** Build a new instance.
44       * @param nSteps number of steps
45       * @param minStep minimum step size (s)
46       * @param maxStep maximum step size (s)
47       * @param dP position error (m)
48       * @see AdamsMoultonIntegrator
49       * @see NumericalPropagator#tolerances(double, Orbit, OrbitType)
50       */
51      public AdamsMoultonIntegratorBuilder(final int nSteps, final double minStep,
52                                             final double maxStep, final double dP) {
53          this.nSteps  = nSteps;
54          this.minStep = minStep;
55          this.maxStep = maxStep;
56          this.dP      = dP;
57      }
58  
59      /** {@inheritDoc} */
60      public AbstractIntegrator buildIntegrator(final Orbit orbit, final OrbitType orbitType) {
61          final double[][] tol = NumericalPropagator.tolerances(dP, orbit, orbitType);
62          return new AdamsMoultonIntegrator(nSteps, minStep, maxStep, tol[0], tol[1]);
63      }
64  
65  }