org.hypergraphdb
Interface TwoWayIterator<T>

All Superinterfaces:

java.util.Iterator<T>

All Known Subinterfaces:

HGRandomAccessResult<ValueType>, HGSearchResult<T>, RSCombiner<T>

All Known Implementing Classes:

FilteredResultSet, HandleArrayResultSet, IndexResultSet, InMemoryIntersectionResult, KeyScanResultSet, LinkTargetsResultSet, MappedResult, PipedResult, ProjectionAtomResultSet, SingleKeyResultSet, SingleValueResultSet, SortedIntersectionResult, TraversalResult, UnionResult, ZigZagIntersectionResult

public interface TwoWayIterator<T>
extends java.util.Iterator<T>

This interface defines a bi-directional iterator over a collection of objects.

Author:

Borislav Iordanov

Method Summary

boolean	hasPrev() Return true if there is a previous element in the current iteration state and false otherwise.
T	prev() Returns the previous element in this iteration.

Methods inherited from interface java.util.Iterator

hasNext, next, remove

Method Detail

hasPrev

boolean hasPrev()

Return true if there is a previous element in the current iteration state and false otherwise. After the iterator has been initialized, the value of hasPrev will always be false.

prev

T prev()

Returns the previous element in this iteration.

Throws:

NoSuchElementException - if there is no previous element (e.g. at the beginning of the iteration).