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

Class LimitedSizeIteratorUtil

java.lang.Object

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

public class LimitedSizeIteratorUtil
extends Object

Author:

Jerven Bolleman, SIB Swiss Institute of Bioinformatics

Constructor Summary

Constructors

Constructor and Description
LimitedSizeIteratorUtil()

Method Summary

Modifier and Type	Method and Description
static <V> boolean	add(V object, Collection<V> excludeSet, AtomicLong used, long maxSize)
static Set<org.eclipse.rdf4j.query.BindingSet>	addAll(org.eclipse.rdf4j.common.iteration.Iteration<? extends org.eclipse.rdf4j.query.BindingSet,? extends org.eclipse.rdf4j.query.QueryEvaluationException> arg2, Set<org.eclipse.rdf4j.query.BindingSet> includeSet, AtomicLong used, long maxSize)

Methods inherited from class java.lang.Object

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

Constructor Detail

LimitedSizeIteratorUtil

public LimitedSizeIteratorUtil()

Method Detail

addAll

public static Set<org.eclipse.rdf4j.query.BindingSet> addAll(org.eclipse.rdf4j.common.iteration.Iteration<? extends org.eclipse.rdf4j.query.BindingSet,? extends org.eclipse.rdf4j.query.QueryEvaluationException> arg2,
                                                             Set<org.eclipse.rdf4j.query.BindingSet> includeSet,
                                                             AtomicLong used,
                                                             long maxSize)
                                                      throws org.eclipse.rdf4j.query.QueryEvaluationException

Parameters:

arg2 - the iteration with elements to add to the includeSet

includeSet - the set that should have all unique elements of arg2

used - the collection size counter of all collections used in answering a query

maxSize - the point at which we throw a new query exception

Returns:

the includeSet

Throws:

org.eclipse.rdf4j.query.QueryEvaluationException - trigerred when maxSize is smaller than the used value

add

public static <V> boolean add(V object,
                              Collection<V> excludeSet,
                              AtomicLong used,
                              long maxSize)
                       throws org.eclipse.rdf4j.query.QueryEvaluationException

Parameters:

object - object to put in set if not there already.

excludeSet - set that we need to store object in.

used - AtomicLong tracking how many elements we have in storage.

maxSize -

Throws:

org.eclipse.rdf4j.query.QueryEvaluationException - when the object is added to the set and the total elements in all limited size collections exceed the allowed maxSize.