org.eclipse.rdf4j.query.algebra.evaluation

Interface EvaluationStrategyFactory

All Known Implementing Classes:

AbstractEvaluationStrategyFactory, ExtendedEvaluationStrategyFactory, StrictEvaluationStrategyFactory

public interface EvaluationStrategyFactory

Factory for EvaluationStrategys.

Method Summary

Modifier and Type	Method and Description
EvaluationStrategy	createEvaluationStrategy(Dataset dataset, TripleSource tripleSource) Returns the EvaluationStrategy to use to evaluate queries for the given Dataset and TripleSource.
long	getQuerySolutionCacheThreshold() Get the number of query solutions the EvaluationStrategy will keep in main memory before it attempts to sync to a temporary disk cache.
void	setQuerySolutionCacheThreshold(long threshold) Set the number of query solutions the EvaluationStrategy will keep in main memory before it attempts to sync to a temporary disk cache.

Method Detail

setQuerySolutionCacheThreshold

void setQuerySolutionCacheThreshold(long threshold)

Set the number of query solutions the EvaluationStrategy will keep in main memory before it attempts to sync to a temporary disk cache. If set to 0, no disk caching will occur. EvaluationStrategies that provide no disk caching functionality are free to ignore this parameter.

Parameters:

threshold - the number of query solutions that the EvaluationStrategy can cache in main memory before attempting disk sync.

getQuerySolutionCacheThreshold

long getQuerySolutionCacheThreshold()

Get the number of query solutions the EvaluationStrategy will keep in main memory before it attempts to sync to a temporary disk cache. If set to 0, no disk caching will occur. EvaluationStrategies that provide no disk caching functionality are free to ignore this parameter.

createEvaluationStrategy

EvaluationStrategy createEvaluationStrategy(Dataset dataset,
                                            TripleSource tripleSource)

Returns the EvaluationStrategy to use to evaluate queries for the given Dataset and TripleSource.

Parameters:

dataset - the DataSet to evaluate queries against.

tripleSource - the TripleSource to evaluate queries against.

Returns:

an EvaluationStrategy.