Package org.eclipse.rdf4j.query.algebra.evaluation.function.aggregate

Class StatisticCollector

java.lang.Object

org.eclipse.rdf4j.query.algebra.evaluation.function.aggregate.StatisticCollector

All Implemented Interfaces:

org.eclipse.rdf4j.query.parser.sparql.aggregate.AggregateCollector

Direct Known Subclasses:

StandardDeviationCollector, VarianceCollector

@Experimental
public abstract class StatisticCollector
extends Object
implements org.eclipse.rdf4j.query.parser.sparql.aggregate.AggregateCollector

AggregateCollector implementation that processes SPARQL statistical functions based on input Literal values.

Author:

Tomas Kovachev t.kovachev1996@gmail.com

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	population
protected org.apache.commons.math3.stat.descriptive.SummaryStatistics	statistics
protected ValueExprEvaluationException	typeError
protected static org.eclipse.rdf4j.model.Literal	ZERO

Constructor Summary

Constructors

Constructor	Description
StatisticCollector(boolean population)

Method Summary

Modifier and Type	Method	Description
void	addValue(org.eclipse.rdf4j.model.Literal val)
protected abstract org.eclipse.rdf4j.model.Literal	computeValue()
org.eclipse.rdf4j.model.Value	getFinalValue()
boolean	hasError()
void	setTypeError(ValueExprEvaluationException typeError)

Methods inherited from class java.lang.Object

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

Field Detail

ZERO

protected static final org.eclipse.rdf4j.model.Literal ZERO

statistics

protected final org.apache.commons.math3.stat.descriptive.SummaryStatistics statistics

population

protected final boolean population

typeError

protected ValueExprEvaluationException typeError

Constructor Detail

StatisticCollector

public StatisticCollector(boolean population)

Method Detail

getFinalValue

public org.eclipse.rdf4j.model.Value getFinalValue()
                                            throws ValueExprEvaluationException

Specified by:

getFinalValue in interface org.eclipse.rdf4j.query.parser.sparql.aggregate.AggregateCollector

Throws:

ValueExprEvaluationException

setTypeError

public void setTypeError(ValueExprEvaluationException typeError)

hasError

public boolean hasError()

addValue

public void addValue(org.eclipse.rdf4j.model.Literal val)

computeValue

protected abstract org.eclipse.rdf4j.model.Literal computeValue()