Package org.apache.jena.util.iterator

A package for defining useful iterators and iterator operations, including concatenation, mapping, filtering, empty and singleton iterators, iterator wrappers, and the ExtendedIterator class used in many places in Jena.

Interface Summary

Interface	Description
ClosableIterator<T>	An iterator which should be closed after use.
ExtendedIterator<T>	An ExtendedIterator is a ClosableIterator on which other operations are defined for convenience in iterator composition: composition, filtering in, filtering out, and element mapping. NOTE that the result of these operations consumes the base iterator(s); they do not make independent copies.
MapFilter<R,S>	Combines the actions of Map and Filter, mapping unacceptable objects to null and acceptable ones to their mapped value.

Class Summary

Class	Description
FilterIterator<T>	Creates a sub-Iterator by filtering.
LazyIterator<T>	An ExtendedIterator that is created lazily.
Map1Iterator<From,To>	An iterator that consumes an underlying iterator and maps its results before delivering them; supports remove if the underlying iterator does.
MapFilterIterator<T,X>	A MapFilterIterator takes a MapFilter and an [Extended]Iterator and returns a new ExtendedIterator which delivers the sequence of all non-null elements MapFilter(X) for X from the base iterator.
NiceIterator<T>	NiceIterator is the standard base class implementing ExtendedIterator.
NullIterator<T>	An empty iterator.
RandomOrderIterator<T>	RandomOrderIterator - Reorders the elements returned by an Iterator.
SingletonIterator<T>	A ClosableIterator that contains only one element
UniqueFilter<T>	A Filter that filters out duplicate values.
WrappedIterator<T>	a WrappedIterator is an ExtendedIterator wrapping around a plain (or presented as plain) Iterator.