org.eclipse.rdf4j.federated.evaluation.iterator

Class SingleBindingSetIteration

java.lang.Object

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

org.eclipse.rdf4j.federated.evaluation.iterator.SingleBindingSetIteration

All Implemented Interfaces:

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

public class SingleBindingSetIteration
extends AbstractCloseableIteration<BindingSet,QueryEvaluationException>

Represents an iteration that contains only a single binding set.

Author:

Andreas Schwarte

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	hasNext
protected BindingSet	res

Constructor Summary

Constructors

Constructor and Description
SingleBindingSetIteration(BindingSet res)

Method Summary

Modifier and Type	Method and Description
protected void	handleClose() Called by AbstractCloseableIteration.close() when it is called for the first time.
boolean	hasNext() Returns true if the iteration has more elements.
BindingSet	next() Returns the next element in the iteration.
void	remove() Removes from the underlying collection the last element returned by the iteration (optional operation).

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.Iteration

stream

Field Detail

res

protected final BindingSet res

hasNext

protected boolean hasNext

Constructor Detail

SingleBindingSetIteration

public SingleBindingSetIteration(BindingSet res)

Method Detail

hasNext

public boolean hasNext()

Description copied from interface: Iteration

Returns true if the iteration has more elements. (In other words, returns true if Iteration.next() would return an element rather than throwing a NoSuchElementException.)

Returns:

true if the iteration has more elements.

next

public BindingSet next()

Description copied from interface: Iteration

Returns the next element in the iteration.

Returns:

the next element in the iteration.

remove

public void remove()

Description copied from interface: Iteration

Removes from the underlying collection the last element returned by the iteration (optional operation). This method can be called only once per call to next.

handleClose

protected void handleClose()
                    throws QueryEvaluationException

Description copied from class: AbstractCloseableIteration

Called by AbstractCloseableIteration.close() when it is called for the first time. This method is only called once on each iteration. By default, this method does nothing.

Overrides:

handleClose in class AbstractCloseableIteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException