LookaheadIterator

All Superinterfaces:

java.lang.AutoCloseable, java.io.Closeable, SequenceIterator

All Known Subinterfaces:

ConstrainedIterator<T>

All Known Implementing Classes:

AdjacentTextNodeMergingIterator, ArrayIterator, ArrayIterator.OfNodes, AttributeIterator, BigRangeIterator, EmptyIterator, FocusTrackingIterator, GroupAdjacentIterator, GroupByIterator, GroupByIterator.ManualGroupByIterator, GroupEndingIterator, GroupMatchingIterator, GroupStartingIterator, ItemMappingIterator, ListIterator, ListIterator.Atomic, ListIterator.OfNodes, LookaheadIteratorImpl, ManualGroupIterator, ManualIterator, ManualRegexIterator, MergeGroupingIterator, MergeGroupingIterator.ManualMergeGroupingIterator, MergeIterator, MultiIndex.SelectedItemsIterator, MultithreadedFocusTrackingIterator, MultithreadedItemMappingIterator, NodeWrappingAxisIterator, OneToOneMappingIterator, RangeIterator, ReverseListIterator, ReverseRangeIterator, SingleAtomicIterator, SingleNodeIterator, SingletonIterator, SortedGroupIterator, SortedIterator, SubsequenceIterator, TailIterator, UnionEnumeration, UnionIterator, UntypedAtomizingIterator, ValueTailIterator
```
public interface LookaheadIterator
extends SequenceIterator
```
A SequenceIterator is used to iterate over a sequence. A LookaheadIterator is one that supports a hasNext() method to determine if there are more nodes after the current node.

- Nested Class Summary
  - Nested classes/interfaces inherited from interface net.sf.saxon.om.SequenceIterator
    SequenceIterator.Property
- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  boolean hasNext()
  Determine whether there are more items to come.
  - Methods inherited from interface net.sf.saxon.om.SequenceIterator
    close, forEachOrFail, getProperties, materialize, next

- Method Detail
  - hasNext
```
boolean hasNext()
```
    Determine whether there are more items to come. Note that this operation is stateless and it is not necessary (or usual) to call it before calling next(). It is used only when there is an explicit need to tell if we are at the last element.
    This method must not be called unless the result of getProperties() on the iterator includes the property SequenceIterator.Property.LOOKAHEAD
    
    Returns:
    
    true if there are more items in the sequence