net.sourceforge.cilib.util.selection.recipes
Class RouletteWheelSelection<E extends Comparable>

java.lang.Object
  net.sourceforge.cilib.util.selection.recipes.RouletteWheelSelection<E>

Type Parameters:

E - The selection type.

All Implemented Interfaces:

Serializable, Cloneable, SelectionRecipe<E>

public class RouletteWheelSelection<E extends Comparable>
extends Object
implements SelectionRecipe<E>

A recipe for Roulette wheel selection.

Roulette wheel selection is performed by:

1. Weighing the elements of a selection.
2. Performing a proportional ordering of the weighed elements.
3. Returning the best result.

Author:

Wiehann Matthysen

See Also:

Serialized Form

Constructor Summary

RouletteWheelSelection()
Create a new instance.

RouletteWheelSelection(RouletteWheelSelection copy)
Create a copy of the provided instance.

RouletteWheelSelection(Weighing<E> weighing)
Create a new instance with the provided weighing strategy.

RouletteWheelSelection(Weighing<E> weighing, Random random)

Method Summary

RouletteWheelSelection	getClone() Create a cloned copy of the current object and return it.
Weighing<E>	getWeighing() Get the current weighing strategy.
E	select(List<? extends E> elements) Perform the selection process.
void	setWeighing(Weighing<E> weighing) Set the weighing strategy

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RouletteWheelSelection

public RouletteWheelSelection()

Create a new instance.

RouletteWheelSelection

public RouletteWheelSelection(Weighing<E> weighing)

Create a new instance with the provided weighing strategy.

Parameters:

weighing - The weighing strategy to set.

RouletteWheelSelection

public RouletteWheelSelection(Weighing<E> weighing,
                              Random random)

RouletteWheelSelection

public RouletteWheelSelection(RouletteWheelSelection copy)

Create a copy of the provided instance.

Parameters:

copy - The instance to copy.

Method Detail

getClone

public RouletteWheelSelection getClone()

Create a cloned copy of the current object and return it. In general the created copy will be a deep copy of the provided instance. As a result this operation an be quite expensive if used incorrectly.

Specified by:

getClone in interface Cloneable

Specified by:

getClone in interface SelectionRecipe<E extends Comparable>

Returns:

An exact clone of the current object instance.

See Also:

Object.clone()

setWeighing

public void setWeighing(Weighing<E> weighing)

Set the weighing strategy

Parameters:

weighing - The strategy to set.

getWeighing

public Weighing<E> getWeighing()

Get the current weighing strategy.

Returns:

The current weighing strategy.

select

public E select(List<? extends E> elements)

Perform the selection process.

Specified by:

select in interface SelectionRecipe<E extends Comparable>

Parameters:

elements - The elements to perfrom the selection on.

Returns:

The selected element.