org.apache.commons.math3.ode
Class MultistepIntegrator.NordsieckInitializer

java.lang.Object
  extended by org.apache.commons.math3.ode.MultistepIntegrator.NordsieckInitializer
All Implemented Interfaces:
StepHandler
Enclosing class:
MultistepIntegrator

private class MultistepIntegrator.NordsieckInitializer
extends Object
implements StepHandler

Specialized step handler storing the first step.


Field Summary
private  int count
          Steps counter.
private  double[] t
          First steps times.
private  double[][] y
          First steps states.
private  double[][] yDot
          First steps derivatives.
 
Constructor Summary
MultistepIntegrator.NordsieckInitializer(int nSteps, int n)
          Simple constructor.
 
Method Summary
 void handleStep(StepInterpolator interpolator, boolean isLast)
          Handle the last accepted step
 void init(double t0, double[] y0, double time)
          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

count

private int count
Steps counter.


t

private final double[] t
First steps times.


y

private final double[][] y
First steps states.


yDot

private final double[][] yDot
First steps derivatives.

Constructor Detail

MultistepIntegrator.NordsieckInitializer

public MultistepIntegrator.NordsieckInitializer(int nSteps,
                                                int n)
Simple constructor.

Parameters:
nSteps - number of steps of the multistep method (excluding the one being computed)
n - problem dimension
Method Detail

handleStep

public void handleStep(StepInterpolator interpolator,
                       boolean isLast)
                throws MaxCountExceededException
Handle the last accepted step

Specified by:
handleStep in interface StepHandler
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(double t0,
                 double[] y0,
                 double time)
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 StepHandler
Parameters:
t0 - start value of the independent time variable
y0 - array containing the start value of the state vector
time - target time for the integration


Copyright (c) 2003-2013 Apache Software Foundation