AdamsMoultonIntegratorBuilder.java

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package org.orekit.propagation.conversion;

import org.hipparchus.ode.AbstractIntegrator;
import org.hipparchus.ode.nonstiff.AdamsMoultonIntegrator;
import org.orekit.orbits.Orbit;
import org.orekit.orbits.OrbitType;
import org.orekit.propagation.numerical.NumericalPropagator;

/** Builder for AdamsMoultonIntegrator.
 * @author Pascal Parraud
 * @since 6.0
 */
public class AdamsMoultonIntegratorBuilder implements ODEIntegratorBuilder {

    /** Number of steps. */
    private final int nSteps;

    /** Minimum step size (s). */
    private final double minStep;

    /** Maximum step size (s). */
    private final double maxStep;

    /** Minimum step size (s). */
    private final double dP;

    /** Build a new instance.
     * @param nSteps number of steps
     * @param minStep minimum step size (s)
     * @param maxStep maximum step size (s)
     * @param dP position error (m)
     * @see AdamsMoultonIntegrator
     * @see NumericalPropagator#tolerances(double, Orbit, OrbitType)
     */
    public AdamsMoultonIntegratorBuilder(final int nSteps, final double minStep,
                                           final double maxStep, final double dP) {
        this.nSteps  = nSteps;
        this.minStep = minStep;
        this.maxStep = maxStep;
        this.dP      = dP;
    }

    /** {@inheritDoc} */
    public AbstractIntegrator buildIntegrator(final Orbit orbit, final OrbitType orbitType) {
        final double[][] tol = NumericalPropagator.tolerances(dP, orbit, orbitType);
        return new AdamsMoultonIntegrator(nSteps, minStep, maxStep, tol[0], tol[1]);
    }

}