org.neo4j.helpers.collection
Class NestingIterator<T,U>

java.lang.Object
  org.neo4j.helpers.collection.PrefetchingIterator<T>
      org.neo4j.helpers.collection.NestingIterator<T,U>

Type Parameters:

T - the type of items to return

U - the type of items in the surface item iterator

All Implemented Interfaces:

Iterator<T>

public abstract class NestingIterator<T,U>
extends PrefetchingIterator<T>

For each item in the supplied iterator (called "surface item") there's instantiated an iterator from that item which is iterated before moving on to the next surface item.

Constructor Summary

NestingIterator(Iterator<U> source)

Method Summary

protected abstract Iterator<T>	createNestedIterator(U item)
protected T	fetchNextOrNull()
U	getCurrentSurfaceItem()

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

NestingIterator

public NestingIterator(Iterator<U> source)

Method Detail

createNestedIterator

protected abstract Iterator<T> createNestedIterator(U item)

getCurrentSurfaceItem

public U getCurrentSurfaceItem()

fetchNextOrNull

protected T fetchNextOrNull()

Specified by:

fetchNextOrNull in class PrefetchingIterator<T>