All Superinterfaces:

ODEStepHandler
```
@Deprecated
public interface StepHandler
extends ODEStepHandler
```
Deprecated.
as of 1.0, replaced with ODEStepHandler

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.

See Also:

ODEIntegrator, ODEStateInterpolator

Method Summary

All Methods Instance Methods Abstract Methods Default Methods Deprecated Methods
Modifier and Type	Method	Description
`void`	`handleStep(org.hipparchus.migration.ode.sampling.MigrationStepInterpolator interpolator, boolean isLast)`	Deprecated. Handle the last accepted step
`default void`	`handleStep(ODEStateInterpolator interpolator, boolean isLast)`	Deprecated. Handle the last accepted step
`void`	`init(double t0, double[] y0, double t)`	Deprecated. Initialize step handler at the start of an ODE integration.
`default void`	`init(ODEStateAndDerivative initialState, double finalTime)`	Deprecated. Initialize step handler at the start of an ODE integration.

- Method Detail
  - init
```
default void init(ODEStateAndDerivative initialState,
                  double finalTime)
```
    Deprecated.
    
    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.
    
    The default implementation does nothing
    }
    
    Specified by:
    
    init in interface ODEStepHandler
    
    Parameters:
    
    initialState - initial time, state vector and derivative
    
    finalTime - target time for the integration
  - handleStep
```
default void handleStep(ODEStateInterpolator interpolator,
                        boolean isLast)
                 throws MathIllegalStateException
```
    Deprecated.
    
    Handle the last accepted step}
    
    Specified by:
    
    handleStep in interface ODEStepHandler
    
    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 DenseOutputModel 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:
    
    MathIllegalStateException - if the interpolator throws one because the number of functions evaluations is exceeded
  - init
```
void init(double t0,
          double[] y0,
          double t)
```
    Deprecated.
    
    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.
    
    Parameters:
    
    t0 - start value of the independent time variable
    
    y0 - array containing the start value of the state vector
    
    t - target time for the integration
  - handleStep
```
void handleStep(org.hipparchus.migration.ode.sampling.MigrationStepInterpolator interpolator,
                boolean isLast)
         throws MathIllegalStateException
```
    Deprecated.
    
    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
    
    Throws:
    
    MathIllegalStateException - if the interpolator throws one because the number of functions evaluations is exceeded

Interface StepHandler

Method Summary

Method Detail

init

handleStep

init

handleStep