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NodeIterator Interface

Table 8-3 summarizes the methods of available through the NodeIterator interface.

Table 8-3 Summary of NodeIterator Methods; Package Traversal

Function	Summary
XmlDomIterDetach	Detach a node iterator (deactivate it).
XmlDomIterNextNode	Returns next node for iterator.
XmlDomIterPrevNode	Returns previous node for iterator.

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XmlDomIterDetach

Detaches the NodeIterator from the set which it iterated over, releasing any resources and placing the iterator in the INVALID state. After detach has been invoked, calls to XmlDomIterNextNode or XmlDomIterPrevNode will raise the exception XMLERR_ITER_DETACHED.

Syntax

xmlerr XmlDomIterDetach(
   xmlctx *xctx, 
   xmliter *iter);

Parameter	In/Out	Description
xctx	IN	XML context
iter	IN	node iterator object

See Also: XmlDomIterNextNode, XmlDomIterPrevNode

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XmlDomIterNextNode

Returns the next node in the set and advances the position of the iterator in the set. After a node iterator is created, the first call to XmlDomIterNextNode returns the first node in the set. It assumed that the reference node (current iterator position) is never deleted. Otherwise, changes in the underlying DOM tree do not invalidate the iterator.

Syntax

xmlnode* XmlDomIterNextNode(
   xmlctx *xctx, 
   xmliter *iter, 
   xmlerr *xerr);

Parameter	In/Out	Description
xctx	IN	XML context
iter	IN	node iterator object
xerr	OUT	numeric return error code

Returns

(xmlnode *) next node in set being iterated over [or NULL]

See Also: XmlDomIterPrevNode, XmlDomIterDetach

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XmlDomIterPrevNode

Returns the previous node in the set and moves the position of the iterator backward in the set.

Syntax

xmlnode* XmlDomIterPrevNode(
   xmlctx *xctx, 
   xmliter *iter, 
   xmlerr *xerr);

Parameter	In/Out	Description
xctx	IN	XML context
iter	IN	node iterator object
xerr	OUT	numeric return error code

Returns

(xmlnode *) previous node in set being iterated over [or NULL]

See Also: XmlDomIterNextNode, XmlDomIterDetach