Package org.eclipse.rdf4j.query
Interface QueryResult<T>
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- All Superinterfaces:
AutoCloseable,CloseableIteration<T>,Iterable<T>,Iterator<T>
- All Known Subinterfaces:
GraphQueryResult,TupleQueryResult
- All Known Implementing Classes:
BackgroundGraphResult,BackgroundTupleResult,CachedGraphQueryResult,CachedTupleQueryResult,CleanerGraphQueryResult,CleanerTupleQueryResult,IteratingGraphQueryResult,IteratingTupleQueryResult,MutableTupleQueryResult,ReusableGraphQueryResult,ReusableTupleQueryResult
public interface QueryResult<T> extends CloseableIteration<T>, Iterable<T>
Super type of all query result types (TupleQueryResult, GraphQueryResult, etc.).- Author:
- Jeen Broekstra, Arjohn Kampman
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Method Summary
All Methods Instance Methods Abstract Methods Default Methods Modifier and Type Method Description booleanhasNext()Returnstrueif the query result has more elements.default Iterator<T>iterator()Tnext()Returns the next element in the query result.default Stream<T>stream()Convert the result elements to a JavaStream.-
Methods inherited from interface org.eclipse.rdf4j.common.iteration.CloseableIteration
close
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Methods inherited from interface java.lang.Iterable
forEach, spliterator
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Methods inherited from interface java.util.Iterator
forEachRemaining, remove
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Method Detail
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hasNext
boolean hasNext() throws QueryEvaluationExceptionReturnstrueif the query result has more elements. (In other words, returnstrueifnext()would return an element rather than throwing aNoSuchElementException.)- Specified by:
hasNextin interfaceIterator<T>- Returns:
trueif the iteration has more elements.- Throws:
QueryEvaluationException- if an error occurs while executing the query.
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next
T next() throws QueryEvaluationException
Returns the next element in the query result.- Specified by:
nextin interfaceIterator<T>- Returns:
- the next element in the query result.
- Throws:
NoSuchElementException- if the iteration has no more elements or if it has been closed.QueryEvaluationException- if an error occurs while executing the query.
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stream
default Stream<T> stream()
Convert the result elements to a JavaStream. Note that the consumer should take care to close the stream (by calling Stream#close() or using try-with-resource) if it is not fully consumed.- Specified by:
streamin interfaceCloseableIteration<T>- Returns:
- stream a
Streamof query result elements.
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