org.apache.commons.math3.ode

Class MultistepFieldIntegrator.FieldNordsieckInitializer

java.lang.Object

org.apache.commons.math3.ode.MultistepFieldIntegrator.FieldNordsieckInitializer

All Implemented Interfaces:

FieldStepHandler<T>

Enclosing class:

MultistepFieldIntegrator<T extends RealFieldElement<T>>

private class MultistepFieldIntegrator.FieldNordsieckInitializer
extends java.lang.Object
implements FieldStepHandler<T>

Specialized step handler storing the first step.

Field Summary

Fields

Modifier and Type	Field and Description
private int	count Steps counter.
private FieldEquationsMapper<T>	mapper Equation mapper.
private FieldODEStateAndDerivative<T>	savedStart Saved start.
private T[]	t First steps times.
private T[][]	y First steps states.
private T[][]	yDot First steps derivatives.

Constructor Summary

Constructors

Constructor and Description
MultistepFieldIntegrator.FieldNordsieckInitializer(FieldEquationsMapper<T> mapper, int nbStartPoints) Simple constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	handleStep(FieldStepInterpolator<T> interpolator, boolean isLast) Handle the last accepted step
void	init(FieldODEStateAndDerivative<T> initialState, T finalTime) Initialize step handler at the start of an ODE integration.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

mapper

private final FieldEquationsMapper<T extends RealFieldElement<T>> mapper

Equation mapper.

count

private int count

Steps counter.

savedStart

private FieldODEStateAndDerivative<T extends RealFieldElement<T>> savedStart

Saved start.

t

private final T extends RealFieldElement<T>[] t

First steps times.

y

private final T extends RealFieldElement<T>[][] y

First steps states.

yDot

private final T extends RealFieldElement<T>[][] yDot

First steps derivatives.

Constructor Detail

MultistepFieldIntegrator.FieldNordsieckInitializer

MultistepFieldIntegrator.FieldNordsieckInitializer(FieldEquationsMapper<T> mapper,
                                                  int nbStartPoints)

Simple constructor.

Parameters:

mapper - equation mapper

nbStartPoints - number of start points (including the initial point)

Method Detail

handleStep

public void handleStep(FieldStepInterpolator<T> interpolator,
              boolean isLast)
                throws MaxCountExceededException

Handle the last accepted step

Specified by:

handleStep in interface FieldStepHandler<T extends RealFieldElement<T>>

Parameters:

interpolator - interpolator for the last accepted step. For efficiency purposes, the various integrators reuse the same object on each call, so if the instance wants to keep it across all calls (for example to provide at the end of the integration a continuous model valid throughout the integration range, as the ContinuousOutputModel class does), it should build a local copy using the clone method of the interpolator and store this copy. Keeping only a reference to the interpolator and reusing it will result in unpredictable behavior (potentially crashing the application).

isLast - true if the step is the last one

Throws:

MaxCountExceededException - if the interpolator throws one because the number of functions evaluations is exceeded

init

public void init(FieldODEStateAndDerivative<T> initialState,
        T finalTime)

Initialize step handler at the start of an ODE integration.

This method is called once at the start of the integration. It may be used by the step handler to initialize some internal data if needed.

Specified by:

init in interface FieldStepHandler<T extends RealFieldElement<T>>

Parameters:

initialState - initial time, state vector and derivative

finalTime - target time for the integration