org.eclipse.rdf4j.query.algebra.evaluation.limited.iterator

Class LimitedSizeHashJoinIteration

java.lang.Object

org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration<E,X>

org.eclipse.rdf4j.common.iteration.LookAheadIteration<org.eclipse.rdf4j.query.BindingSet,org.eclipse.rdf4j.query.QueryEvaluationException>

org.eclipse.rdf4j.query.algebra.evaluation.iterator.HashJoinIteration

org.eclipse.rdf4j.query.algebra.evaluation.limited.iterator.LimitedSizeHashJoinIteration

All Implemented Interfaces:

AutoCloseable, org.eclipse.rdf4j.common.iteration.CloseableIteration<org.eclipse.rdf4j.query.BindingSet,org.eclipse.rdf4j.query.QueryEvaluationException>, org.eclipse.rdf4j.common.iteration.Iteration<org.eclipse.rdf4j.query.BindingSet,org.eclipse.rdf4j.query.QueryEvaluationException>

public class LimitedSizeHashJoinIteration
extends HashJoinIteration

Author:

MJAHale

Field Summary

Fields inherited from class org.eclipse.rdf4j.query.algebra.evaluation.iterator.HashJoinIteration

joinAttributes

Constructor Summary

Constructors

Constructor and Description
LimitedSizeHashJoinIteration(EvaluationStrategy limitedSizeEvaluationStrategy, org.eclipse.rdf4j.query.algebra.Join join, org.eclipse.rdf4j.query.BindingSet bindings, AtomicLong used, long maxSize)

Method Summary

Modifier and Type	Method and Description
protected <E> void	add(Collection<E> col, E value)
protected <E> void	addAll(Collection<E> col, List<E> values)
protected void	disposeHashTable(Map<BindingSetHashKey,List<org.eclipse.rdf4j.query.BindingSet>> map) Utility methods to clear-up in case not using in-memory hash table.
protected <E> E	nextFromCache(Iterator<E> iter)
protected void	putHashTableEntry(Map<BindingSetHashKey,List<org.eclipse.rdf4j.query.BindingSet>> hashTable, BindingSetHashKey hashKey, List<org.eclipse.rdf4j.query.BindingSet> hashValue)

Methods inherited from class org.eclipse.rdf4j.query.algebra.evaluation.iterator.HashJoinIteration

closeHashValue, disposeCache, getNextElement, handleClose, makeHashTable, makeHashValue, makeIterationCache, putHashTableEntry

Methods inherited from class org.eclipse.rdf4j.common.iteration.LookAheadIteration

hasNext, next, remove

Methods inherited from class org.eclipse.rdf4j.common.iteration.AbstractCloseableIteration

close, isClosed

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LimitedSizeHashJoinIteration

public LimitedSizeHashJoinIteration(EvaluationStrategy limitedSizeEvaluationStrategy,
                                    org.eclipse.rdf4j.query.algebra.Join join,
                                    org.eclipse.rdf4j.query.BindingSet bindings,
                                    AtomicLong used,
                                    long maxSize)
                             throws org.eclipse.rdf4j.query.QueryEvaluationException

Throws:

org.eclipse.rdf4j.query.QueryEvaluationException

Method Detail

nextFromCache

protected <E> E nextFromCache(Iterator<E> iter)

Overrides:

nextFromCache in class HashJoinIteration

add

protected <E> void add(Collection<E> col,
                       E value)
                throws org.eclipse.rdf4j.query.QueryEvaluationException

Overrides:

add in class HashJoinIteration

Throws:

org.eclipse.rdf4j.query.QueryEvaluationException

addAll

protected <E> void addAll(Collection<E> col,
                          List<E> values)
                   throws org.eclipse.rdf4j.query.QueryEvaluationException

Overrides:

addAll in class HashJoinIteration

Throws:

org.eclipse.rdf4j.query.QueryEvaluationException

putHashTableEntry

protected void putHashTableEntry(Map<BindingSetHashKey,List<org.eclipse.rdf4j.query.BindingSet>> hashTable,
                                 BindingSetHashKey hashKey,
                                 List<org.eclipse.rdf4j.query.BindingSet> hashValue)
                          throws org.eclipse.rdf4j.query.QueryEvaluationException

Throws:

org.eclipse.rdf4j.query.QueryEvaluationException

disposeHashTable

protected void disposeHashTable(Map<BindingSetHashKey,List<org.eclipse.rdf4j.query.BindingSet>> map)

Description copied from class: HashJoinIteration

Utility methods to clear-up in case not using in-memory hash table.

Overrides:

disposeHashTable in class HashJoinIteration