Class DummyStepHandler

  extended by org.apache.commons.math3.ode.sampling.DummyStepHandler
All Implemented Interfaces:

public class DummyStepHandler
extends Object
implements StepHandler

This class is a step handler that does nothing.

This class is provided as a convenience for users who are only interested in the final state of an integration and not in the intermediate steps. Its handleStep method does nothing.

Since this class has no internal state, it is implemented using the Singleton design pattern. This means that only one instance is ever created, which can be retrieved using the getInstance method. This explains why there is no public constructor.

$Id: 1416643 2012-12-03 19:37:14Z tn $
See Also:

Method Summary
static DummyStepHandler getInstance()
          Get the only instance.
 void handleStep(StepInterpolator interpolator, boolean isLast)
          Handle the last accepted step.
 void init(double t0, double[] y0, double t)
          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

Method Detail


public static DummyStepHandler getInstance()
Get the only instance.

the only instance


public void init(double t0,
                 double[] y0,
                 double t)
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
t0 - start value of the independent time variable
y0 - array containing the start value of the state vector
t - target time for the integration


public void handleStep(StepInterpolator interpolator,
                       boolean isLast)
Handle the last accepted step. This method does nothing in this class.

Specified by:
handleStep in interface StepHandler
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), it should build a local copy using the clone method and store this copy.
isLast - true if the step is the last one

Copyright © 2003-2012 The Apache Software Foundation. All Rights Reserved.