Package org.eclipse.rdf4j.query.algebra.evaluation.impl

Interface QueryEvaluationContext

All Known Implementing Classes:

ArrayBindingBasedQueryEvaluationContext, QueryEvaluationContext.Minimal

public interface QueryEvaluationContext

A QueryEvaluationContext stores values and methods that are valid throughout the lifetime of a query execution.

A classic case is the case of NOW() evaluation to the same instant for all invocations of that function in one query evaluation.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static class	QueryEvaluationContext.Minimal

Method Summary

Modifier and Type	Method	Description
default BiConsumer<Value,MutableBindingSet>	addBinding(String variableName)
default MutableBindingSet	createBindingSet()
default MutableBindingSet	createBindingSet(BindingSet bindings)
default Function<BindingSet,Binding>	getBinding(String variableName)
default Comparator<Value>	getComparator()
Dataset	getDataset()
Literal	getNow()
default Function<BindingSet,Value>	getValue(String variableName)
default Predicate<BindingSet>	hasBinding(String variableName)
default BiConsumer<Value,MutableBindingSet>	setBinding(String variableName)

Method Details

getComparator

@Experimental
default Comparator<Value> getComparator()

getNow

Literal getNow()

Returns:

the shared now;

getDataset

Dataset getDataset()

Returns:

The dataset that this query is operation on.

createBindingSet

default MutableBindingSet createBindingSet()

hasBinding

default Predicate<BindingSet> hasBinding(String variableName)

getBinding

default Function<BindingSet,Binding> getBinding(String variableName)

getValue

default Function<BindingSet,Value> getValue(String variableName)

setBinding

default BiConsumer<Value,MutableBindingSet> setBinding(String variableName)

addBinding

default BiConsumer<Value,MutableBindingSet> addBinding(String variableName)

createBindingSet

default MutableBindingSet createBindingSet(BindingSet bindings)