Package org.eclipse.rdf4j.query

Class QueryResults.TupleQueryResultFilter

java.lang.Object

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

org.eclipse.rdf4j.query.QueryResults.TupleQueryResultFilter

All Implemented Interfaces:

AutoCloseable, Iterable<BindingSet>, CloseableIteration<BindingSet,QueryEvaluationException>, Iteration<BindingSet,QueryEvaluationException>, QueryResult<BindingSet>, TupleQueryResult

Enclosing class:

QueryResults

private static class QueryResults.TupleQueryResultFilter
extends AbstractCloseableIteration<BindingSet,QueryEvaluationException>
implements TupleQueryResult

Field Summary

Fields

Modifier and Type	Field	Description
private final DistinctIteration<BindingSet,QueryEvaluationException>	filter
private final TupleQueryResult	unfiltered

Constructor Summary

Constructors

Constructor	Description
TupleQueryResultFilter(TupleQueryResult wrappedResult)

Method Summary

Modifier and Type	Method	Description
List<String>	getBindingNames()	Gets the names of the bindings, in order of projection.
void	handleClose()	Called by AbstractCloseableIteration.close() when it is called for the first time.
boolean	hasNext()	Returns true if the query result has more elements.
BindingSet	next()	Returns the next element in the query result.
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.CloseableIteration

close

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface org.eclipse.rdf4j.query.QueryResult

iterator, stream

Field Details

filter

private final DistinctIteration<BindingSet,QueryEvaluationException> filter

unfiltered

private final TupleQueryResult unfiltered

Constructor Details

TupleQueryResultFilter

public TupleQueryResultFilter(TupleQueryResult wrappedResult)

Method Details

hasNext

public boolean hasNext()
                throws QueryEvaluationException

Description copied from interface: QueryResult

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

Specified by:

hasNext in interface Iteration<BindingSet,QueryEvaluationException>

Specified by:

hasNext in interface QueryResult<BindingSet>

Returns:

true if the iteration has more elements.

Throws:

QueryEvaluationException - if an error occurs while executing the query.

next

public BindingSet next()
                throws QueryEvaluationException

Description copied from interface: QueryResult

Returns the next element in the query result.

Specified by:

next in interface Iteration<BindingSet,QueryEvaluationException>

Specified by:

next in interface QueryResult<BindingSet>

Returns:

the next element in the query result.

Throws:

QueryEvaluationException - if an error occurs while executing the query.

remove

public void remove()
            throws QueryEvaluationException

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.

Specified by:

remove in interface Iteration<BindingSet,QueryEvaluationException>

Throws:

QueryEvaluationException

handleClose

public 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

getBindingNames

public List<String> getBindingNames()
                             throws QueryEvaluationException

Description copied from interface: TupleQueryResult

Gets the names of the bindings, in order of projection.

Specified by:

getBindingNames in interface TupleQueryResult

Returns:

The binding names, in order of projection.

Throws:

QueryEvaluationException