Module org.apache.jena.serviceplugins

Package org.apache.jena.sparql.service.enhancer.impl.util

Class IteratorUtils

java.lang.Object

org.apache.jena.sparql.service.enhancer.impl.util.IteratorUtils

public class IteratorUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
IteratorUtils()

Method Summary

Modifier and Type	Method	Description
static void	main(String[] args)
static void	mainBasic()
static <K, X, Y> com.google.common.collect.AbstractIterator<com.google.common.collect.Table.Cell<K,X,Iterator<Y>>>	partialLeftMergeJoin(Iterator<X> lhs, Iterator<Y> rhs, Function<X,K> xToK, Function<Y,K> yToK)	For every item in lhs return an iterator over the corresponding sub-range of items in rhs.

Methods inherited from class java.lang.Object

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

Constructor Details

IteratorUtils

public IteratorUtils()

Method Details

partialLeftMergeJoin

public static <K,
X,
Y>
com.google.common.collect.AbstractIterator<com.google.common.collect.Table.Cell<K,X,Iterator<Y>>> partialLeftMergeJoin(Iterator<X> lhs,
 Iterator<Y> rhs,
 Function<X,K> xToK,
 Function<Y,K> yToK)

For every item in lhs return an iterator over the corresponding sub-range of items in rhs. As soon as rhs is consumed, then for every remaining key in lhs the iterator will be null. Keys in both iterators must appear in the same order - although rhs may omit some or all keys. There MUST NOT exist an item in rhs which has a key that does not correspond to an item in lhs!

mainBasic

public static void mainBasic()

main

public static void main(String[] args)