Class SPARQLMinusIteration
java.lang.Object
org.eclipse.rdf4j.common.iteration.FilterIteration<BindingSet>
org.eclipse.rdf4j.query.algebra.evaluation.iterator.SPARQLMinusIteration
- All Implemented Interfaces:
AutoCloseable,Iterator<BindingSet>,CloseableIteration<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:
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Constructor Summary
ConstructorsConstructorDescriptionSPARQLMinusIteration(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. -
Method Summary
Modifier and TypeMethodDescriptionprotected booleanaccept(BindingSet bindingSet) Tests whether or not the specified object should be returned by this Iteration.protected longprotected CloseableIteration<BindingSet>protected voidCloses this Iteration and also closes the wrapped Iteration if it is aCloseableIteration.protected Set<BindingSet>makeSet()protected Set<BindingSet>makeSet(CloseableIteration<BindingSet> rightArg) Methods inherited from class org.eclipse.rdf4j.common.iteration.FilterIteration
close, hasNext, next, removeMethods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods inherited from interface org.eclipse.rdf4j.common.iteration.CloseableIteration
streamMethods inherited from interface java.util.Iterator
forEachRemaining
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Constructor Details
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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 Details
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accept
Description copied from class:FilterIterationTests 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:
acceptin classFilterIteration<BindingSet>- Parameters:
bindingSet- The object to be tested.- Returns:
- true if the object should be returned, false otherwise.
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makeSet
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makeSet
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makeSet
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handleClose
protected void handleClose()Description copied from class:FilterIterationCloses this Iteration and also closes the wrapped Iteration if it is aCloseableIteration.- Specified by:
handleClosein classFilterIteration<BindingSet>
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getRightArg
- Returns:
- Returns the rightArg.
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clearExcludeSet
protected long clearExcludeSet()
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