Class BottomUpJoinIterator
- java.lang.Object
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- org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E,X>
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- org.eclipse.rdf4j.common.iteration.LookAheadIteration<BindingSet,QueryEvaluationException>
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- org.eclipse.rdf4j.query.algebra.evaluation.iterator.BottomUpJoinIterator
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- All Implemented Interfaces:
AutoCloseable,CloseableIteration<BindingSet,QueryEvaluationException>,Iteration<BindingSet,QueryEvaluationException>
@Deprecated public class BottomUpJoinIterator extends LookAheadIteration<BindingSet,QueryEvaluationException>
Deprecated.replaced by HashJoinIterationJoin Iterator that executes a basic bottom-up hash-join algorithm. To be used in cases where interleaved iteration joining is not appropriate (e.g. when the join arguments are subselects).- Author:
- jeen
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Constructor Summary
Constructors Constructor Description BottomUpJoinIterator(EvaluationStrategy strategy, Join join, BindingSet bindings)Deprecated.
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description protected voidadd(List<BindingSet> leftArgResults, BindingSet b)Deprecated.protected voidaddAll(List<BindingSet> hashTableValues, List<BindingSet> values)Deprecated.protected longclearHashTable()Deprecated.protected BindingSetgetNextElement()Deprecated.Gets the next element.protected voidhandleClose()Deprecated.Called byAbstractCloseableIteration.close()when it is called for the first time.protected List<BindingSet>makeList()Deprecated.Utility methods to make it easier to inserted custom store dependent listprotected List<BindingSet>makeList(List<BindingSet> key)Deprecated.Utility methods to make it easier to inserted custom store dependent listprotected Map<BindingSet,List<BindingSet>>makeMap()Deprecated.Utility methods to make it easier to inserted custom store dependent mapsprotected voidput(Map<BindingSet,List<BindingSet>> hashTable, BindingSet hashKey, List<BindingSet> hashValue)Deprecated.protected BindingSetremoveFirstElement(List<BindingSet> list)Deprecated.Remove the first (0 index) element from a BindingSet list.-
Methods inherited from class org.eclipse.rdf4j.common.iteration.LookAheadIteration
hasNext, next, remove
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Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration
close, isClosed
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Constructor Detail
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BottomUpJoinIterator
public BottomUpJoinIterator(EvaluationStrategy strategy, Join join, BindingSet bindings) throws QueryEvaluationException
Deprecated.- Throws:
QueryEvaluationException
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Method Detail
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getNextElement
protected BindingSet getNextElement() throws QueryEvaluationException
Deprecated.Description copied from class:LookAheadIterationGets the next element. Subclasses should implement this method so that it returns the next element.- Specified by:
getNextElementin classLookAheadIteration<BindingSet,QueryEvaluationException>- Returns:
- The next element, or null if no more elements are available.
- Throws:
QueryEvaluationException
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handleClose
protected void handleClose() throws QueryEvaluationExceptionDeprecated.Description 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 classLookAheadIteration<BindingSet,QueryEvaluationException>- Throws:
QueryEvaluationException
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clearHashTable
protected long clearHashTable()
Deprecated.- Returns:
- the size that the hashtable had before clearing it.
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put
protected void put(Map<BindingSet,List<BindingSet>> hashTable, BindingSet hashKey, List<BindingSet> hashValue) throws QueryEvaluationException
Deprecated.- Throws:
QueryEvaluationException
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addAll
protected void addAll(List<BindingSet> hashTableValues, List<BindingSet> values) throws QueryEvaluationException
Deprecated.- Throws:
QueryEvaluationException
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add
protected void add(List<BindingSet> leftArgResults, BindingSet b) throws QueryEvaluationException
Deprecated.- Throws:
QueryEvaluationException
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makeMap
protected Map<BindingSet,List<BindingSet>> makeMap()
Deprecated.Utility methods to make it easier to inserted custom store dependent maps- Returns:
- map
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makeList
protected List<BindingSet> makeList()
Deprecated.Utility methods to make it easier to inserted custom store dependent list- Returns:
- list
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makeList
protected List<BindingSet> makeList(List<BindingSet> key)
Deprecated.Utility methods to make it easier to inserted custom store dependent list- Returns:
- list
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removeFirstElement
protected BindingSet removeFirstElement(List<BindingSet> list) throws QueryEvaluationException
Deprecated.Remove the first (0 index) element from a BindingSet list.- Parameters:
list- which is worked on.- Returns:
- the removed BindingSet
- Throws:
QueryEvaluationException
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