Package net.sf.saxon.tree.tiny

Class NamedChildIterator

java.lang.Object

net.sf.saxon.tree.tiny.NamedChildIterator

All Implemented Interfaces:

Closeable, AutoCloseable, AtomizedValueIterator, SequenceIterator, AxisIterator, LookaheadIterator

final class NamedChildIterator
extends Object
implements AxisIterator, LookaheadIterator, AtomizedValueIterator

This class is a fast path iterator for the child axis in the TinyTree, where the axis specifies an explicit name test for the required element nodes.

Constructor Summary

Constructors

Constructor	Description
NamedChildIterator(TinyTree tree, TinyNodeImpl node, int fingerprint)	Return an enumeration over children or siblings of the context node

Method Summary

Modifier and Type	Method	Description
boolean	hasNext()	Test whether there are any more nodes to come.
NodeInfo	next()	Return the next node in the sequence
AtomicSequence	nextAtomizedValue()	Deliver the atomic value that is next in the atomized result
boolean	supportsHasNext()	Ask whether the hasNext() method can be called.

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.saxon.om.SequenceIterator

close

Constructor Detail

NamedChildIterator

NamedChildIterator(TinyTree tree,
                   TinyNodeImpl node,
                   int fingerprint)

Return an enumeration over children or siblings of the context node

Parameters:

tree - The TinyTree containing the context node

node - The context node, the start point for the iteration

fingerprint - The fingerprint of the required element children

Method Detail

next

public NodeInfo next()

Return the next node in the sequence

Specified by:

next in interface AxisIterator

Specified by:

next in interface SequenceIterator

Returns:

the next node, or null if the end of the sequence is reached

nextAtomizedValue

public AtomicSequence nextAtomizedValue()
                                 throws XPathException

Deliver the atomic value that is next in the atomized result

Specified by:

nextAtomizedValue in interface AtomizedValueIterator

Returns:

the next atomic value

Throws:

XPathException - if a failure occurs reading or atomizing the next value

supportsHasNext

public boolean supportsHasNext()

Description copied from interface: LookaheadIterator

Ask whether the hasNext() method can be called. This method must be called before calling hasNext(), because some iterators implement this interface, but only support look-ahead under particular circumstances (this is usually because they delegate to another iterator)

Specified by:

supportsHasNext in interface LookaheadIterator

Returns:

true if the LookaheadIterator.hasNext() method is available

hasNext

public boolean hasNext()

Test whether there are any more nodes to come. This method is used only when testing whether the current item is the last in the sequence. It's not especially efficient, but is more efficient than the alternative strategy which involves counting how many nodes there are in the sequence.

Specified by:

hasNext in interface LookaheadIterator

Returns:

true if there are more items in the sequence