org.dllearner.algorithms.el

Class StableHeuristic

java.lang.Object

org.dllearner.algorithms.el.StableHeuristic

All Implemented Interfaces:

Comparator<SearchTreeNode>, ELHeuristic, Component, Heuristic<SearchTreeNode>

public class StableHeuristic
extends Object
implements ELHeuristic

A stable comparator for search tree nodes. Stable means that the order of nodes will not change during the run of the learning algorithm. In this implementation, this is ensured by using only covered examples and tree size as criteria.

Author:

Jens Lehmann

Constructor Summary

Constructors

Constructor and Description
StableHeuristic()

Method Summary

Modifier and Type	Method and Description
int	compare(SearchTreeNode o1, SearchTreeNode o2)
double	getNodeScore(SearchTreeNode node)
void	init() Method to be called after the component has been configured.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

StableHeuristic

public StableHeuristic()

Method Detail

compare

public int compare(SearchTreeNode o1,
                   SearchTreeNode o2)

Specified by:

compare in interface Comparator<SearchTreeNode>

init

public void init()
          throws ComponentInitException

Description copied from interface: Component

Method to be called after the component has been configured. Implementation of components can overwrite this method to perform setup and initialisation tasks for this component.

Specified by:

init in interface Component

Throws:

ComponentInitException - This exception is thrown if any exceptions occur within the initialisation process of this component. As component developer, you are encouraged to re-throw occurring exception as ComponentInitException and giving an error message as well as the actually exception by using the constructor ComponentInitException(String, Throwable).

getNodeScore

public double getNodeScore(SearchTreeNode node)

Specified by:

getNodeScore in interface Heuristic<SearchTreeNode>