Class BottomUpJoinIterator
java.lang.Object
org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E,X>
org.eclipse.rdf4j.common.iteration.LookAheadIteration<BindingSet,QueryEvaluationException>
org.eclipse.rdf4j.query.algebra.evaluation.iterator.BottomUpJoinIterator
- All Implemented Interfaces:
AutoCloseable,CloseableIteration<BindingSet,,QueryEvaluationException> Iteration<BindingSet,QueryEvaluationException>
@Deprecated
public class BottomUpJoinIterator
extends LookAheadIteration<BindingSet,QueryEvaluationException>
Deprecated.
replaced by HashJoinIteration
Join 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
-
Constructor Summary
ConstructorsConstructorDescriptionBottomUpJoinIterator(EvaluationStrategy strategy, Join join, BindingSet bindings) Deprecated. -
Method Summary
Modifier and TypeMethodDescriptionprotected voidadd(List<BindingSet> leftArgResults, BindingSet b) Deprecated.protected voidaddAll(List<BindingSet> hashTableValues, List<BindingSet> values) Deprecated.protected longDeprecated.protected BindingSetDeprecated.Gets the next element.protected voidDeprecated.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, removeMethods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration
close, isClosedMethods 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
stream
-
Constructor Details
-
BottomUpJoinIterator
public BottomUpJoinIterator(EvaluationStrategy strategy, Join join, BindingSet bindings) throws QueryEvaluationException Deprecated.- Throws:
QueryEvaluationException
-
-
Method Details
-
getNextElement
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
-
handleClose
Deprecated.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
-
clearHashTable
protected long clearHashTable()Deprecated.- Returns:
- the size that the hashtable had before clearing it.
-
put
protected void put(Map<BindingSet, List<BindingSet>> hashTable, BindingSet hashKey, List<BindingSet> hashValue) throws QueryEvaluationExceptionDeprecated.- Throws:
QueryEvaluationException
-
addAll
protected void addAll(List<BindingSet> hashTableValues, List<BindingSet> values) throws QueryEvaluationException Deprecated.- Throws:
QueryEvaluationException
-
add
Deprecated.- Throws:
QueryEvaluationException
-
makeMap
Deprecated.Utility methods to make it easier to inserted custom store dependent maps- Returns:
- map
-
makeList
Deprecated.Utility methods to make it easier to inserted custom store dependent list- Returns:
- list
-
makeList
Deprecated.Utility methods to make it easier to inserted custom store dependent list- Returns:
- list
-
removeFirstElement
Deprecated.Remove the first (0 index) element from a BindingSet list.- Parameters:
list- which is worked on.- Returns:
- the removed BindingSet
- Throws:
QueryEvaluationException
-