Package org.htmlunit.html

Class HtmlDomTreeWalker

java.lang.Object

org.htmlunit.html.HtmlDomTreeWalker

All Implemented Interfaces:

Serializable

public class HtmlDomTreeWalker
extends Object
implements Serializable

In general this is an implementation of org.w3c.dom.traversal.TreeWalker. The class org.w3c.dom.traversal.TreeWalker is not available on Android therefore we have this impl as backend.

See Also:

• DOM-Level-2-Traversal-Range
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
HtmlDomTreeWalker(DomNode root, int whatToShow, NodeFilter filter, boolean expandEntityReferences)	Creates an instance.

Method Summary

Modifier and Type	Method	Description
DomNode	firstChild()
DomNode	getCurrentNode()
boolean	getExpandEntityReferences()
NodeFilter	getFilter()
static int	getFlagForNode(Node node)	INTERNAL API - SUBJECT TO CHANGE AT ANY TIME - USE AT YOUR OWN RISK. Given a Node, return the appropriate constant for whatToShow.
DomNode	getRoot()
int	getWhatToShow()
DomNode	lastChild()
DomNode	nextNode()
DomNode	nextSibling()
DomNode	parentNode()
DomNode	previousNode()
DomNode	previousSibling()
void	setCurrentNode(Node currentNode)

Methods inherited from class java.lang.Object

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

Constructor Details

HtmlDomTreeWalker

public HtmlDomTreeWalker(DomNode root,
 int whatToShow,
 NodeFilter filter,
 boolean expandEntityReferences)
                  throws DOMException

Creates an instance.

Parameters:

root - The root node of the TreeWalker. Must not be null.

whatToShow - Flag specifying which types of nodes appear in the logical view of the TreeWalker. See NodeFilter for the set of possible Show_ values.

filter - The NodeFilter to be used with this TreeWalker, or null to indicate no filter.

expandEntityReferences - If false, the contents of EntityReference nodes are not present in the logical view.

Throws:

DOMException - on attempt to create a TreeWalker with a root that is null.

Method Details

getRoot

public DomNode getRoot()

Returns:

the root node

See Also:

• TreeWalker.getRoot()

getWhatToShow

public int getWhatToShow()

Returns:

NodeFilter constant

See Also:

• TreeWalker.getWhatToShow()

getFilter

public NodeFilter getFilter()

Returns:

the filter

See Also:

• TreeWalker.getFilter()

getExpandEntityReferences

public boolean getExpandEntityReferences()

Returns:

the ExpandEntityReferences setting

See Also:

• TreeWalker.getExpandEntityReferences()

getCurrentNode

public DomNode getCurrentNode()

Returns:

the current node

See Also:

• TreeWalker.getCurrentNode()

setCurrentNode

public void setCurrentNode(Node currentNode)
                    throws DOMException

Parameters:

currentNode - the current node

Throws:

DOMException - if the current node provides is null

See Also:

• TreeWalker.setCurrentNode(Node)

nextNode

public DomNode nextNode()

Returns:

the next node

See Also:

• TreeWalker.nextNode()

getFlagForNode

public static int getFlagForNode(Node node)

INTERNAL API - SUBJECT TO CHANGE AT ANY TIME - USE AT YOUR OWN RISK.
Given a Node, return the appropriate constant for whatToShow.

Parameters:

node - the node

Returns:

the whatToShow constant for the type of specified node

nextSibling

public DomNode nextSibling()

Returns:

the next sibling node

See Also:

• TreeWalker.nextSibling()

parentNode

public DomNode parentNode()

Returns:

the parent node

See Also:

• TreeWalker.parentNode()

previousSibling

public DomNode previousSibling()

Returns:

the previous sibling node

See Also:

• TreeWalker.previousSibling()

lastChild

public DomNode lastChild()

Returns:

the last child node

See Also:

• TreeWalker.lastChild()

previousNode

public DomNode previousNode()

Returns:

the previous node

See Also:

• TreeWalker.previousNode()

firstChild

public DomNode firstChild()

Returns:

the first child node

See Also:

• TreeWalker.firstChild()