/*
    * Licensed to the Hipparchus project under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF 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.propagation.events;
  
  import org.hipparchus.ode.nonstiff.AdamsBashforthIntegrator;
  import org.hipparchus.ode.nonstiff.AdamsMoultonFieldIntegrator;
  import org.hipparchus.ode.nonstiff.DormandPrince853FieldIntegrator;
  import org.hipparchus.util.Decimal64;
  import org.hipparchus.util.Decimal64Field;
  import org.orekit.orbits.OrbitType;
  import org.orekit.propagation.FieldPropagator;
  import org.orekit.propagation.FieldSpacecraftState;
  import org.orekit.propagation.numerical.FieldNumericalPropagator;
  import org.orekit.propagation.numerical.NumericalPropagator;
  
  /**
   * Test event handling with a {@link NumericalPropagator} and a {@link
   * AdamsBashforthIntegrator}.
   *
   * @author Evan Ward
   */
  public class FieldCloseEventsNumericalAMTest extends FieldCloseEventsAbstractTest<Decimal64> {
  
      /** Constructor. */
      public FieldCloseEventsNumericalAMTest() {
          super(Decimal64Field.getInstance());
      }
  
      /**
       * Create a propagator using the {@link #initialOrbit}.
       *
       * @param stepSize of integrator.
       * @return a usable propagator.
       */
      public FieldPropagator<Decimal64> getPropagator(double stepSize) {
          double[][] tol = FieldNumericalPropagator
                  .tolerances(v(1), initialOrbit, OrbitType.CARTESIAN);
          final AdamsMoultonFieldIntegrator<Decimal64> integrator =
                  new AdamsMoultonFieldIntegrator<>(field, 4, stepSize, stepSize, tol[0], tol[1]);
          final DormandPrince853FieldIntegrator<Decimal64> starter =
                  new DormandPrince853FieldIntegrator<>(
                          field, stepSize / 100, stepSize / 10, tol[0], tol[1]);
          starter.setInitialStepSize(stepSize / 20);
          integrator.setStarterIntegrator(starter);
          final FieldNumericalPropagator<Decimal64> propagator = new FieldNumericalPropagator<>(field, integrator);
          propagator.setInitialState(new FieldSpacecraftState<>(initialOrbit));
          propagator.setOrbitType(OrbitType.CARTESIAN);
          return propagator;
      }
  
  }