org.dllearner.algorithms.meta

Class DisjunctiveCELA

java.lang.Object

org.dllearner.core.AbstractComponent

org.dllearner.core.AbstractCELA

org.dllearner.algorithms.meta.DisjunctiveCELA

All Implemented Interfaces:

ClassExpressionLearningAlgorithm, Component, LearningAlgorithm, StoppableLearningAlgorithm

public class DisjunctiveCELA
extends AbstractCELA

A meta algorithm that combines the (partial) solutions of multiple calls of the base class learning algorithm LA into a disjunction. In particular, a partial solution is computed by running LA for a given time only on examples of the learning problem that aren't already covered by previously computed solutions.

Author:

Lorenz Buehmann

Field Summary

Fields inherited from class org.dllearner.core.AbstractCELA

allowedConcepts, allowedDataProperties, allowedObjectProperties, baseURI, bestEvaluatedDescriptions, dataFactory, dfPercent, duplicator, ignoredConcepts, ignoredDataProperties, ignoredObjectProperties, isRunning, learningProblem, MAX_NR_OF_RESULTS, maxExecutionTimeInSeconds, minimizer, nanoStartTime, OWL_NOTHING, OWL_THING, prefixes, reasoner, renderer, stop

Fields inherited from class org.dllearner.core.AbstractComponent

initialized

Constructor Summary

Constructors

Constructor and Description
DisjunctiveCELA(AbstractCELA la)

Method Summary

Modifier and Type	Method and Description
void	init() Method to be called after the component has been configured.
void	setMaxExecutionTimeInSeconds(long maxExecutionTimeInSeconds) Sets the max.
void	setMinAccuracyPartialSolution(double minAccuracyPartialSolution)
void	setPartialSolutionSearchTimeSeconds(int partialSolutionSearchTimeSeconds)
void	setTryFullCoverage(boolean tryFullCoverage)
void	start() Starts the algorithm.
void	stop() Stops the algorithm gracefully.

Methods inherited from class org.dllearner.core.AbstractCELA

changeLearningProblem, changeReasonerComponent, descriptionToString, getAllowedConcepts, getAllowedDataProperties, getAllowedObjectProperties, getCurrentlyBestDescription, getCurrentlyBestDescriptions, getCurrentlyBestDescriptions, getCurrentlyBestDescriptions, getCurrentlyBestEvaluatedDescription, getCurrentlyBestEvaluatedDescriptions, getCurrentlyBestEvaluatedDescriptions, getCurrentlyBestEvaluatedDescriptions, getCurrentlyBestEvaluatedDescriptions, getCurrentlyBestMostGeneralEvaluatedDescriptions, getCurrentRuntimeInMilliSeconds, getDurationAsString, getIgnoredConcepts, getIgnoredDataProperties, getIgnoredObjectProperties, getLearningProblem, getMaxExecutionTimeInSeconds, getNiceDescription, getReasoner, getRemainingRuntimeInMilliseconds, getSolutionString, initClassHierarchy, initDataPropertyHierarchy, initObjectPropertyHierarchy, isRunning, isTimeExpired, isUseMinimizer, rewrite, setAllowedConcepts, setAllowedDataProperties, setAllowedObjectProperties, setIgnoredConcepts, setIgnoredDataProperties, setIgnoredObjectProperties, setLearningProblem, setMaxExecutionTime, setReasoner, setRenderer, setUseMinimizer, supportedLearningProblems

Methods inherited from class org.dllearner.core.AbstractComponent

isInitialized

Methods inherited from class java.lang.Object

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

Constructor Detail

DisjunctiveCELA

public DisjunctiveCELA(AbstractCELA la)

Parameters:

la - the basic learning algorithm

Method Detail

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.

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.ComponentInitException(String, Throwable).

start

public void start()

Description copied from interface: LearningAlgorithm

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

stop

public void stop()

Description copied from interface: StoppableLearningAlgorithm

Stops the algorithm gracefully. A stopped algorithm cannot be resumed anymore. Use this method for cleanup and freeing memory.

Specified by:

stop in interface StoppableLearningAlgorithm

Overrides:

stop in class AbstractCELA

setMaxExecutionTimeInSeconds

public void setMaxExecutionTimeInSeconds(long maxExecutionTimeInSeconds)

Sets the max. execution time of the whole algorithm. Note, this values should always be higher than the max. execution time to compute a partial solution.

Overrides:

setMaxExecutionTimeInSeconds in class AbstractCELA

Parameters:

maxExecutionTimeInSeconds - the overall the max. execution time

setTryFullCoverage

public void setTryFullCoverage(boolean tryFullCoverage)

setMinAccuracyPartialSolution

public void setMinAccuracyPartialSolution(double minAccuracyPartialSolution)

setPartialSolutionSearchTimeSeconds

public void setPartialSolutionSearchTimeSeconds(int partialSolutionSearchTimeSeconds)