Package org.eclipse.rdf4j.query
Class QueryResults.GraphQueryResultFilter
- java.lang.Object
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- org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<Statement,QueryEvaluationException>
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- org.eclipse.rdf4j.query.QueryResults.GraphQueryResultFilter
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- All Implemented Interfaces:
java.lang.AutoCloseable,java.lang.Iterable<Statement>,CloseableIteration<Statement,QueryEvaluationException>,Iteration<Statement,QueryEvaluationException>,GraphQueryResult,QueryResult<Statement>
- Enclosing class:
- QueryResults
private static class QueryResults.GraphQueryResultFilter extends AbstractCloseableIteration<Statement,QueryEvaluationException> implements GraphQueryResult
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Field Summary
Fields Modifier and Type Field Description private DistinctIteration<Statement,QueryEvaluationException>filterprivate GraphQueryResultunfiltered
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Constructor Summary
Constructors Constructor Description GraphQueryResultFilter(GraphQueryResult wrappedResult)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description java.util.Map<java.lang.String,java.lang.String>getNamespaces()Retrieves relevant namespaces from the query result.voidhandleClose()Called byAbstractCloseableIteration.close()when it is called for the first time.booleanhasNext()Returnstrueif the query result has more elements.Statementnext()Returns the next element in the query result.voidremove()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
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.eclipse.rdf4j.common.iteration.CloseableIteration
close
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Methods inherited from interface org.eclipse.rdf4j.query.QueryResult
iterator, stream
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Field Detail
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filter
private final DistinctIteration<Statement,QueryEvaluationException> filter
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unfiltered
private final GraphQueryResult unfiltered
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Constructor Detail
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GraphQueryResultFilter
public GraphQueryResultFilter(GraphQueryResult wrappedResult)
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Method Detail
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hasNext
public boolean hasNext() throws QueryEvaluationExceptionDescription copied from interface:QueryResultReturnstrueif the query result has more elements. (In other words, returnstrueifQueryResult.next()would return an element rather than throwing aNoSuchElementException.)- Specified by:
hasNextin interfaceIteration<Statement,QueryEvaluationException>- Specified by:
hasNextin interfaceQueryResult<Statement>- Returns:
trueif the iteration has more elements.- Throws:
QueryEvaluationException- if an error occurs while executing the query.
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next
public Statement next() throws QueryEvaluationException
Description copied from interface:QueryResultReturns the next element in the query result.- Specified by:
nextin interfaceIteration<Statement,QueryEvaluationException>- Specified by:
nextin interfaceQueryResult<Statement>- Returns:
- the next element in the query result.
- Throws:
QueryEvaluationException- if an error occurs while executing the query.
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remove
public void remove() throws QueryEvaluationExceptionDescription copied from interface:IterationRemoves 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:
removein interfaceIteration<Statement,QueryEvaluationException>- Throws:
QueryEvaluationException
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handleClose
public void handleClose() throws QueryEvaluationExceptionDescription copied from class:AbstractCloseableIterationCalled byAbstractCloseableIteration.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:
handleClosein classAbstractCloseableIteration<Statement,QueryEvaluationException>- Throws:
QueryEvaluationException
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getNamespaces
public java.util.Map<java.lang.String,java.lang.String> getNamespaces() throws QueryEvaluationExceptionDescription copied from interface:GraphQueryResultRetrieves relevant namespaces from the query result.
The contents of the Map may be modified after it is returned, as the initial return may be performed when the first RDF Statement is encountered.- Specified by:
getNamespacesin interfaceGraphQueryResult- Returns:
- a Map<String, String> object containing (prefix, namespace) pairs.
- Throws:
QueryEvaluationException
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