Xerces-C++ 3.3.0
List of all members
DOMNodeIterator Class Referenceabstract

DOMNodeIterators are used to step through a set of nodes, e.g. More...

#include <xercesc/dom/DOMNodeIterator.hpp>

Public Member Functions

Destructor
virtual ~DOMNodeIterator ()
 Destructor.
 
Functions introduced in DOM Level 2
virtual DOMNode * getRoot ()=0
 The root node of the DOMNodeIterator, as specified when it was created.
 
virtual DOMNodeFilter::ShowType getWhatToShow ()=0
 Return which node types are presented via the iterator.
 
virtual DOMNodeFilter * getFilter ()=0
 The DOMNodeFilter used to screen nodes.
 
virtual bool getExpandEntityReferences ()=0
 Return the expandEntityReferences flag.
 
virtual DOMNode * nextNode ()=0
 Returns the next node in the set and advances the position of the DOMNodeIterator in the set.
 
virtual DOMNode * previousNode ()=0
 Returns the previous node in the set and moves the position of the DOMNodeIterator backwards in the set.
 
virtual void detach ()=0
 Detaches the DOMNodeIterator from the set which it iterated over, releasing any computational resources and placing the DOMNodeIterator in the INVALID state.
 
Non-standard Extension
virtual void release ()=0
 Called to indicate that this NodeIterator is no longer in use and that the implementation may relinquish any resources associated with it.
 

Protected Member Functions

Hidden constructors
 DOMNodeIterator ()
 
 DOMNodeIterator (const DOMNodeIterator &)
 

Detailed Description

DOMNodeIterators are used to step through a set of nodes, e.g.

the set of nodes in a DOMNodeList, the document subtree governed by a particular DOMNode, the results of a query, or any other set of nodes. The set of nodes to be iterated is determined by the implementation of the DOMNodeIterator. DOM Level 2 specifies a single DOMNodeIterator implementation for document-order traversal of a document subtree. Instances of these DOMNodeIterators are created by calling DOMDocumentTraversal.createNodeIterator().

See also the Document Object Model (DOM) Level 2 Traversal and Range Specification.

Since
DOM Level 2

Constructor & Destructor Documentation

◆ DOMNodeIterator() [1/2]

DOMNodeIterator::DOMNodeIterator ( )
protected

◆ DOMNodeIterator() [2/2]

DOMNodeIterator::DOMNodeIterator ( const DOMNodeIterator & )
protected

◆ ~DOMNodeIterator()

virtual DOMNodeIterator::~DOMNodeIterator ( )
virtual

Destructor.

Member Function Documentation

◆ detach()

virtual void DOMNodeIterator::detach ( )
pure virtual

Detaches the DOMNodeIterator from the set which it iterated over, releasing any computational resources and placing the DOMNodeIterator in the INVALID state.

After detach has been invoked, calls to nextNode or previousNode will raise the exception INVALID_STATE_ERR.

Since
DOM Level 2

◆ getExpandEntityReferences()

virtual bool DOMNodeIterator::getExpandEntityReferences ( )
pure virtual

Return the expandEntityReferences flag.

The value of this flag determines whether the children of entity reference nodes are visible to the DOMNodeIterator. If false, these children and their descendants will be rejected. Note that this rejection takes precedence over whatToShow and the filter. Also note that this is currently the only situation where DOMNodeIterators may reject a complete subtree rather than skipping individual nodes.

To produce a view of the document that has entity references expanded and does not expose the entity reference node itself, use the whatToShow flags to hide the entity reference node and set expandEntityReferences to true when creating the DOMNodeIterator. To produce a view of the document that has entity reference nodes but no entity expansion, use the whatToShow flags to show the entity reference node and set expandEntityReferences to false.

Since
DOM Level 2

◆ getFilter()

virtual DOMNodeFilter * DOMNodeIterator::getFilter ( )
pure virtual

The DOMNodeFilter used to screen nodes.

Since
DOM Level 2

◆ getRoot()

virtual DOMNode * DOMNodeIterator::getRoot ( )
pure virtual

The root node of the DOMNodeIterator, as specified when it was created.

Since
DOM Level 2

◆ getWhatToShow()

virtual DOMNodeFilter::ShowType DOMNodeIterator::getWhatToShow ( )
pure virtual

Return which node types are presented via the iterator.

This attribute determines which node types are presented via the DOMNodeIterator. The available set of constants is defined in the DOMNodeFilter interface. Nodes not accepted by whatToShow will be skipped, but their children may still be considered. Note that this skip takes precedence over the filter, if any.

Since
DOM Level 2

◆ nextNode()

virtual DOMNode * DOMNodeIterator::nextNode ( )
pure virtual

Returns the next node in the set and advances the position of the DOMNodeIterator in the set.

After a DOMNodeIterator is created, the first call to nextNode() returns the first node in the set.

Returns
The next DOMNode in the set being iterated over, or null if there are no more members in that set.
Exceptions
DOMExceptionINVALID_STATE_ERR: Raised if this method is called after the detach method was invoked.
Since
DOM Level 2

◆ previousNode()

virtual DOMNode * DOMNodeIterator::previousNode ( )
pure virtual

Returns the previous node in the set and moves the position of the DOMNodeIterator backwards in the set.

Returns
The previous DOMNode in the set being iterated over, or null if there are no more members in that set.
Exceptions
DOMExceptionINVALID_STATE_ERR: Raised if this method is called after the detach method was invoked.
Since
DOM Level 2

◆ release()

virtual void DOMNodeIterator::release ( )
pure virtual

Called to indicate that this NodeIterator is no longer in use and that the implementation may relinquish any resources associated with it.

(release() will call detach() where appropriate)

Access to a released object will lead to unexpected result.

The documentation for this class was generated from the following file:
Generated by doxygen 1.11.0