org.apache.commons.math.ode.sampling
Interface StepHandler

All Known Implementing Classes:

ContinuousOutputModel, DummyStepHandler, StepNormalizer

public interface StepHandler

This interface represents a handler that should be called after each successful step.

The ODE integrators compute the evolution of the state vector at some grid points that depend on their own internal algorithm. Once they have found a new grid point (possibly after having computed several evaluation of the derivative at intermediate points), they provide it to objects implementing this interface. These objects typically either ignore the intermediate steps and wait for the last one, store the points in an ephemeris, or forward them to specialized processing or output methods.

Since:

1.2

Version:

$Id: StepHandler.java 1165033 2011-09-04 14:36:48Z luc $

See Also:

FirstOrderIntegrator, SecondOrderIntegrator, StepInterpolator

Method Summary

void	handleStep(StepInterpolator interpolator, boolean isLast) Handle the last accepted step
void	reset() Reset the step handler.

Method Detail

reset

void reset()

Reset the step handler. Initialize the internal data as required before the first step is handled.

handleStep

void handleStep(StepInterpolator interpolator,
                boolean isLast)

Handle the last accepted step

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