Class SPARQLMinusIteration
- java.lang.Object
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- org.eclipse.rdf4j.common.iteration.FilterIteration<BindingSet>
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- org.eclipse.rdf4j.query.algebra.evaluation.iterator.SPARQLMinusIteration
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- All Implemented Interfaces:
AutoCloseable
,Iterator<BindingSet>
,CloseableIteration<BindingSet>
public class SPARQLMinusIteration extends FilterIteration<BindingSet>
An Iteration that returns the results of an Iteration (the left argument) MINUS any results that are compatible with results of another Iteration (the right argument) or that have no shared variables. This iteration uses the formal definition of the SPARQL 1.1 MINUS operator to determine which BindingSets to return.- Author:
- Jeen
- See Also:
- SPARQL Algebra Documentation
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Constructor Summary
Constructors Constructor Description SPARQLMinusIteration(CloseableIteration<BindingSet> leftArg, CloseableIteration<BindingSet> rightArg)
Creates a new MinusIteration that returns the results of the left argument minus the results of the right argument.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected boolean
accept(BindingSet bindingSet)
Tests whether or not the specified object should be returned by this Iteration.protected long
clearExcludeSet()
protected CloseableIteration<BindingSet>
getRightArg()
protected void
handleClose()
Closes this Iteration and also closes the wrapped Iteration if it is aCloseableIteration
.protected Set<BindingSet>
makeSet()
protected Set<String>
makeSet(Set<String> set)
protected Set<BindingSet>
makeSet(CloseableIteration<BindingSet> rightArg)
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Methods inherited from class org.eclipse.rdf4j.common.iteration.FilterIteration
close, hasNext, next, remove
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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
stream
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Methods inherited from interface java.util.Iterator
forEachRemaining
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Constructor Detail
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SPARQLMinusIteration
public SPARQLMinusIteration(CloseableIteration<BindingSet> leftArg, CloseableIteration<BindingSet> rightArg)
Creates a new MinusIteration that returns the results of the left argument minus the results of the right argument. By default, duplicates are not filtered from the results.- Parameters:
leftArg
- An Iteration containing the main set of elements.rightArg
- An Iteration containing the set of elements that should be filtered from the main set.
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Method Detail
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accept
protected boolean accept(BindingSet bindingSet)
Description copied from class:FilterIteration
Tests whether or not the specified object should be returned by this Iteration. All objects from the wrapped Iteration pass through this method in the same order as they are coming from the wrapped Iteration.- Specified by:
accept
in classFilterIteration<BindingSet>
- Parameters:
bindingSet
- The object to be tested.- Returns:
- true if the object should be returned, false otherwise.
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makeSet
protected Set<BindingSet> makeSet()
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makeSet
protected Set<BindingSet> makeSet(CloseableIteration<BindingSet> rightArg)
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handleClose
protected void handleClose()
Description copied from class:FilterIteration
Closes this Iteration and also closes the wrapped Iteration if it is aCloseableIteration
.- Specified by:
handleClose
in classFilterIteration<BindingSet>
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getRightArg
protected CloseableIteration<BindingSet> getRightArg()
- Returns:
- Returns the rightArg.
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clearExcludeSet
protected long clearExcludeSet()
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