org.dllearner.kb.sparql

Class ClassBasedSampleGenerator

java.lang.Object

org.dllearner.kb.sparql.AbstractSampleGenerator

org.dllearner.kb.sparql.InstanceBasedSampleGenerator

org.dllearner.kb.sparql.ClassBasedSampleGenerator

All Implemented Interfaces:

HasProgressMonitor<AbstractSampleGenerator.SampleGeneratorProgressMonitor>

public class ClassBasedSampleGenerator
extends InstanceBasedSampleGenerator

Computes a sample fragment of the knowledge base given an OWL class.

Author:

Lorenz Buehmann

Nested Class Summary

Nested classes/interfaces inherited from class org.dllearner.kb.sparql.AbstractSampleGenerator

AbstractSampleGenerator.SampleGeneratorProgressMonitor

Constructor Summary

Constructors

Constructor and Description
ClassBasedSampleGenerator(SparqlEndpointKS ks)

Method Summary

Modifier and Type	Method and Description
Set<org.semanticweb.owlapi.model.OWLIndividual>	getNegativeExamples()
Set<org.semanticweb.owlapi.model.OWLIndividual>	getPositiveExamples()
org.semanticweb.owlapi.model.OWLOntology	getSample(org.semanticweb.owlapi.model.OWLClass cls) Computes a sample fragment of the knowledge base by using instances of the given OWL class and also, if enabled, use some instances that do not belong to the class.
static void	main(String[] args)
void	setMaxNrOfNegExamples(int maxNrOfNegExamples)
void	setMaxNrOfPosExamples(int maxNrOfPosExamples)
void	setSeed(long seed) The examples for the sample are chosen randomly, thus, the seed for shuffling can be set here.
void	setUseNegExamples(boolean useNegExamples)

Methods inherited from class org.dllearner.kb.sparql.AbstractSampleGenerator

addAllowedClassNamespaces, addAllowedObjectNamespaces, addAllowedPropertyNamespaces, addIgnoredClasses, addIgnoredProperties, addPostProcessor, getSample, getSampleDepth, progressMonitors, setLoadRelatedSchema, setSampleDepth

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.dllearner.utilities.HasProgressMonitor

addProgressMonitor, removeProgressMonitor

Constructor Detail

ClassBasedSampleGenerator

public ClassBasedSampleGenerator(SparqlEndpointKS ks)

Method Detail

getSample

public org.semanticweb.owlapi.model.OWLOntology getSample(org.semanticweb.owlapi.model.OWLClass cls)

Computes a sample fragment of the knowledge base by using instances of the given OWL class and also, if enabled, use some instances that do not belong to the class.

Parameters:

cls - the OWL class

Returns:

a sample fragment

setMaxNrOfPosExamples

public void setMaxNrOfPosExamples(int maxNrOfPosExamples)

Parameters:

maxNrOfPosExamples - the max. number of pos. examples used for sampling

setMaxNrOfNegExamples

public void setMaxNrOfNegExamples(int maxNrOfNegExamples)

Parameters:

maxNrOfNegExamples - the max. number of neg. examples used for sampling

setUseNegExamples

public void setUseNegExamples(boolean useNegExamples)

Parameters:

useNegExamples - whether to use negative examples or not

getPositiveExamples

public Set<org.semanticweb.owlapi.model.OWLIndividual> getPositiveExamples()

Returns:

the positive examples, i.e. instances of the class used to generate the sample

getNegativeExamples

public Set<org.semanticweb.owlapi.model.OWLIndividual> getNegativeExamples()

Returns:

the negative examples, i.e. individuals that do not belong to the class and are used to generate the sample

setSeed

public void setSeed(long seed)

The examples for the sample are chosen randomly, thus, the seed for shuffling can be set here.

Parameters:

seed - the seed

See Also:

Random.setSeed(long)

main

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

Throws:

Exception