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

Class GroupIterator

java.lang.Object

org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E,X>

org.eclipse.rdf4j.common.iteration.CloseableIteratorIteration<BindingSet,QueryEvaluationException>

org.eclipse.rdf4j.query.algebra.evaluation.iterator.GroupIterator

All Implemented Interfaces:

AutoCloseable, CloseableIteration<BindingSet,QueryEvaluationException>, Iteration<BindingSet,QueryEvaluationException>

public class GroupIterator
extends CloseableIteratorIteration<BindingSet,QueryEvaluationException>

Author:

David Huynh, Arjohn Kampman, Jeen Broekstra, James Leigh, Jerven Bolleman, Tomas Kovachev

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	GroupIterator.Key	A unique key for a set of existing bindings.

Constructor Summary

Constructors

Constructor	Description
GroupIterator(EvaluationStrategy strategy, Group group, BindingSet parentBindings, long iterationCacheSyncThreshold, QueryEvaluationContext context)
GroupIterator(EvaluationStrategy strategy, Group group, BindingSet parentBindings, QueryEvaluationContext context)

Method Summary

Modifier and Type	Method	Description
protected void	handleClose()
boolean	hasNext()
BindingSet	next()

Methods inherited from class org.eclipse.rdf4j.common.iteration.CloseableIteratorIteration

hasIterator, remove, setIterator

Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration

close, isClosed

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.common.iteration.CloseableIteration

stream

Constructor Detail

GroupIterator

public GroupIterator(EvaluationStrategy strategy,
                     Group group,
                     BindingSet parentBindings,
                     QueryEvaluationContext context)
              throws QueryEvaluationException

Throws:

QueryEvaluationException

GroupIterator

public GroupIterator(EvaluationStrategy strategy,
                     Group group,
                     BindingSet parentBindings,
                     long iterationCacheSyncThreshold,
                     QueryEvaluationContext context)
              throws QueryEvaluationException

Throws:

QueryEvaluationException

Method Detail

hasNext

public boolean hasNext()
                throws QueryEvaluationException

Specified by:

hasNext in interface Iteration<BindingSet,QueryEvaluationException>

Overrides:

hasNext in class CloseableIteratorIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException

next

public BindingSet next()
                throws QueryEvaluationException

Specified by:

next in interface Iteration<BindingSet,QueryEvaluationException>

Overrides:

next in class CloseableIteratorIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException

handleClose

protected void handleClose()
                    throws QueryEvaluationException

Overrides:

handleClose in class AbstractCloseableIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException