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>
filter
private GraphQueryResult
unfiltered
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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.void
handleClose()
Called byAbstractCloseableIteration.close()
when it is called for the first time.boolean
hasNext()
Returnstrue
if the query result has more elements.Statement
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
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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 QueryEvaluationException
Description copied from interface:QueryResult
Returnstrue
if the query result has more elements. (In other words, returnstrue
ifQueryResult.next()
would return an element rather than throwing aNoSuchElementException
.)- Specified by:
hasNext
in interfaceIteration<Statement,QueryEvaluationException>
- Specified by:
hasNext
in interfaceQueryResult<Statement>
- Returns:
true
if 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:QueryResult
Returns the next element in the query result.- Specified by:
next
in interfaceIteration<Statement,QueryEvaluationException>
- Specified by:
next
in 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 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 interfaceIteration<Statement,QueryEvaluationException>
- Throws:
QueryEvaluationException
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handleClose
public void handleClose() throws QueryEvaluationException
Description copied from class:AbstractCloseableIteration
Called 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:
handleClose
in classAbstractCloseableIteration<Statement,QueryEvaluationException>
- Throws:
QueryEvaluationException
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getNamespaces
public java.util.Map<java.lang.String,java.lang.String> getNamespaces() throws QueryEvaluationException
Description copied from interface:GraphQueryResult
Retrieves 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:
getNamespaces
in interfaceGraphQueryResult
- Returns:
- a Map<String, String> object containing (prefix, namespace) pairs.
- Throws:
QueryEvaluationException
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