java.lang.Object
- org.apache.commons.math4.legacy.linear.IterationManager

```
public class IterationManager
extends Object
```
This abstract class provides a general framework for managing iterative algorithms. The maximum number of iterations can be set, and methods are provided to monitor the current iteration count. A lightweight event framework is also provided.

Constructor Summary

Constructors
Constructor	Description
`IterationManager(int maxIterations)`	Creates a new instance of this class.
`IterationManager(int maxIterations, IntegerSequence.Incrementor.MaxCountExceededCallback callback)`	Creates a new instance of this class.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addIterationListener(IterationListener listener)`	Attaches a listener to this manager.
`void`	`fireInitializationEvent(IterationEvent e)`	Informs all registered listeners that the initial phase (prior to the main iteration loop) has been completed.
`void`	`fireIterationPerformedEvent(IterationEvent e)`	Informs all registered listeners that a new iteration (in the main iteration loop) has been performed.
`void`	`fireIterationStartedEvent(IterationEvent e)`	Informs all registered listeners that a new iteration (in the main iteration loop) has been started.
`void`	`fireTerminationEvent(IterationEvent e)`	Informs all registered listeners that the final phase (post-iterations) has been completed.
`int`	`getIterations()`	Returns the number of iterations of this solver, 0 if no iterations has been performed yet.
`int`	`getMaxIterations()`	Returns the maximum number of iterations.
`void`	`incrementIterationCount()`	Increments the iteration count by one, and throws an exception if the maximum number of iterations is reached.
`void`	`removeIterationListener(IterationListener listener)`	Removes the specified iteration listener from the list of listeners currently attached to `this` object.
`void`	`resetIterationCount()`	Sets the iteration count to 0.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - IterationManager
```
public IterationManager(int maxIterations)
```
    Creates a new instance of this class.
    
    Parameters:
    
    maxIterations - Maximum number of iterations. MaxCountExceededException will be raised at counter exhaustion.
  - IterationManager
```
public IterationManager(int maxIterations,
                        IntegerSequence.Incrementor.MaxCountExceededCallback callback)
```
    Creates a new instance of this class.
    
    Parameters:
    
    maxIterations - the maximum number of iterations
    
    callback - the function to be called when the maximum number of iterations has been reached. If null, MaxCountExceededException will be raised at counter exhaustion.
    
    Since:
    
    3.1
- Method Detail
  - addIterationListener
```
public void addIterationListener(IterationListener listener)
```
    Attaches a listener to this manager.
    
    Parameters:
    
    listener - A IterationListener object.
  - fireInitializationEvent
```
public void fireInitializationEvent(IterationEvent e)
```
    Informs all registered listeners that the initial phase (prior to the main iteration loop) has been completed.
    
    Parameters:
    
    e - The IterationEvent object.
  - fireIterationPerformedEvent
```
public void fireIterationPerformedEvent(IterationEvent e)
```
    Informs all registered listeners that a new iteration (in the main iteration loop) has been performed.
    
    Parameters:
    
    e - The IterationEvent object.
  - fireIterationStartedEvent
```
public void fireIterationStartedEvent(IterationEvent e)
```
    Informs all registered listeners that a new iteration (in the main iteration loop) has been started.
    
    Parameters:
    
    e - The IterationEvent object.
  - fireTerminationEvent
```
public void fireTerminationEvent(IterationEvent e)
```
    Informs all registered listeners that the final phase (post-iterations) has been completed.
    
    Parameters:
    
    e - The IterationEvent object.
  - getIterations
```
public int getIterations()
```
    Returns the number of iterations of this solver, 0 if no iterations has been performed yet.
    
    Returns:
    
    the number of iterations.
  - getMaxIterations
```
public int getMaxIterations()
```
    Returns the maximum number of iterations.
    
    Returns:
    
    the maximum number of iterations.
  - incrementIterationCount
```
public void incrementIterationCount()
```
    Increments the iteration count by one, and throws an exception if the maximum number of iterations is reached. This method should be called at the beginning of a new iteration.
    
    Throws:
    
    MaxCountExceededException - if the maximum number of iterations is reached.
  - removeIterationListener
```
public void removeIterationListener(IterationListener listener)
```
    Removes the specified iteration listener from the list of listeners currently attached to this object. Attempting to remove a listener which was not previously registered does not cause any error.
    
    Parameters:
    
    listener - The IterationListener to be removed.
  - resetIterationCount
```
public void resetIterationCount()
```
    Sets the iteration count to 0. This method must be called during the initial phase.

Class IterationManager

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

IterationManager

IterationManager

Method Detail

addIterationListener

fireInitializationEvent

fireIterationPerformedEvent

fireIterationStartedEvent

fireTerminationEvent

getIterations

getMaxIterations

incrementIterationCount

removeIterationListener

resetIterationCount