org.neo4j.helpers.collection
Class FilteringIterator<T>

java.lang.Object
  org.neo4j.helpers.collection.PrefetchingIterator<T>
      org.neo4j.helpers.collection.FilteringIterator<T>

Type Parameters:

T - the type of items in the iteration.

All Implemented Interfaces:

java.util.Iterator<T>

public class FilteringIterator<T>
extends PrefetchingIterator<T>

An iterator which filters another iterator, only letting items with certain criterias pass through. All iteration/filtering is done lazily.

Constructor Summary

FilteringIterator(java.util.Iterator<T> source, Predicate<T> predicate)

Method Summary

protected T	fetchNextOrNull()
static <T> java.util.Iterator<T>	noDuplicates(java.util.Iterator<T> source)
static <T> java.util.Iterator<T>	notNull(java.util.Iterator<T> source)

Methods inherited from class org.neo4j.helpers.collection.PrefetchingIterator

getPrefetchedNextOrNull, hasNext, next, remove, setPrefetchedNext

Methods inherited from class java.lang.Object

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

Constructor Detail

FilteringIterator

public FilteringIterator(java.util.Iterator<T> source,
                         Predicate<T> predicate)

Method Detail

fetchNextOrNull

protected T fetchNextOrNull()

Specified by:

fetchNextOrNull in class PrefetchingIterator<T>

notNull

public static <T> java.util.Iterator<T> notNull(java.util.Iterator<T> source)

noDuplicates

public static <T> java.util.Iterator<T> noDuplicates(java.util.Iterator<T> source)