org.dllearner.algorithms
Class SimpleSubclassLearner

java.lang.Object
  org.dllearner.core.AbstractComponent
      org.dllearner.core.AbstractAxiomLearningAlgorithm
          org.dllearner.algorithms.SimpleSubclassLearner

All Implemented Interfaces:

AxiomLearningAlgorithm, ClassExpressionLearningAlgorithm, Component, LearningAlgorithm

public class SimpleSubclassLearner
extends AbstractAxiomLearningAlgorithm
implements ClassExpressionLearningAlgorithm

Learns sub classes using SPARQL queries.

Author:

Lorenz Bühmann, Jens Lehmann

Constructor Summary

SimpleSubclassLearner(SparqlEndpointKS ks)

Method Summary

NamedClass	getClassToDescribe()
List<Axiom>	getCurrentlyBestAxioms(int nrOfAxioms)
List<Description>	getCurrentlyBestDescriptions(int nrOfDescriptions)
List<EvaluatedAxiom>	getCurrentlyBestEvaluatedAxioms(int nrOfAxioms)
List<? extends EvaluatedDescription>	getCurrentlyBestEvaluatedDescriptions(int nrOfDescriptions) Return the best currently found concepts up to some maximum count (no minimality filter used).
int	getMaxExecutionTimeInSeconds()
int	getMaxFetchedRows()
void	init() Method to be called after the component has been configured.
static void	main(String[] args)
void	setClassToDescribe(NamedClass classToDescribe)
void	setMaxExecutionTimeInSeconds(int maxExecutionTimeInSeconds)
void	setMaxFetchedRows(int maxFetchedRows)
void	start() Starts the algorithm.

Methods inherited from class org.dllearner.core.AbstractAxiomLearningAlgorithm

getConfigurator, getCurrentlyBestAxioms, getCurrentlyBestAxioms, getCurrentlyBestEvaluatedAxioms, getCurrentlyBestEvaluatedAxioms

Methods inherited from class org.dllearner.core.AbstractComponent

createConfigOptions, getName

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleSubclassLearner

public SimpleSubclassLearner(SparqlEndpointKS ks)

Method Detail

getCurrentlyBestDescriptions

public List<Description> getCurrentlyBestDescriptions(int nrOfDescriptions)

Specified by:

getCurrentlyBestDescriptions in interface ClassExpressionLearningAlgorithm

Parameters:

nrOfDescriptions - Limit for the number or returned descriptions.

Returns:

The best class descriptions found by the learning algorithm so far.

See Also:

ClassExpressionLearningAlgorithm.getCurrentlyBestEvaluatedDescriptions(int)

getCurrentlyBestEvaluatedDescriptions

public List<? extends EvaluatedDescription> getCurrentlyBestEvaluatedDescriptions(int nrOfDescriptions)

Description copied from interface: ClassExpressionLearningAlgorithm

Return the best currently found concepts up to some maximum count (no minimality filter used).

Specified by:

getCurrentlyBestEvaluatedDescriptions in interface ClassExpressionLearningAlgorithm

Parameters:

nrOfDescriptions - Maximum number of descriptions returned.

Returns:

Return value is getCurrentlyBestDescriptions(nrOfDescriptions, 0.0, false).

getCurrentlyBestAxioms

public List<Axiom> getCurrentlyBestAxioms(int nrOfAxioms)

Specified by:

getCurrentlyBestAxioms in interface AxiomLearningAlgorithm

Overrides:

getCurrentlyBestAxioms in class AbstractAxiomLearningAlgorithm

Parameters:

nrOfAxioms - Limit for the number or returned axioms.

Returns:

The best axioms found by the learning algorithm so far.

getCurrentlyBestEvaluatedAxioms

public List<EvaluatedAxiom> getCurrentlyBestEvaluatedAxioms(int nrOfAxioms)

Specified by:

getCurrentlyBestEvaluatedAxioms in interface AxiomLearningAlgorithm

Overrides:

getCurrentlyBestEvaluatedAxioms in class AbstractAxiomLearningAlgorithm

Parameters:

nrOfAxioms - Limit for the number or returned evaluated axioms.

Returns:

The best evaluated axioms found by the learning algorithm so far.

start

public void start()

Description copied from interface: LearningAlgorithm

Starts the algorithm. It runs until paused, stopped, or a termination criterion has been reached.

Specified by:

start in interface LearningAlgorithm

Overrides:

start in class AbstractAxiomLearningAlgorithm

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

Overrides:

init in class AbstractAxiomLearningAlgorithm

Throws:

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

getMaxExecutionTimeInSeconds

public int getMaxExecutionTimeInSeconds()

setMaxExecutionTimeInSeconds

public void setMaxExecutionTimeInSeconds(int maxExecutionTimeInSeconds)

getClassToDescribe

public NamedClass getClassToDescribe()

setClassToDescribe

public void setClassToDescribe(NamedClass classToDescribe)

getMaxFetchedRows

public int getMaxFetchedRows()

setMaxFetchedRows

public void setMaxFetchedRows(int maxFetchedRows)

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception