org.apache.xml.utils
Class TreeWalker

java.lang.Object
  |
  +--org.apache.xml.utils.TreeWalker

public class TreeWalker

extends java.lang.Object

This class does a pre-order walk of the DOM tree, calling a ContentHandler interface as it goes.

Usage:

**For advanced use only**

Constructor Summary

TreeWalker(ContentHandler contentHandler)
Constructor.

TreeWalker(ContentHandler contentHandler, DOMHelper dh)
Constructor.

TreeWalker(ContentHandler contentHandler, DOMHelper dh, java.lang.String systemId)
Constructor.

Method Summary

ContentHandler	getContentHandler() Get the ContentHandler used for the tree walk.
void	setContentHandler(ContentHandler ch) Get the ContentHandler used for the tree walk.
void	traverse(Node pos) Perform a pre-order traversal non-recursive style.
void	traverse(Node pos, Node top) Perform a pre-order traversal non-recursive style.
void	traverseFragment(Node pos) Perform a pre-order traversal non-recursive style.

Methods inherited from class java.lang.Object

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

Constructor Detail

TreeWalker

public TreeWalker(ContentHandler contentHandler,
                  DOMHelper dh,
                  java.lang.String systemId)

Constructor.

Parameters:

contentHandler - The implemention of the

systemId - System identifier for the document. contentHandler operation (toXMLString, digest, ...)

TreeWalker

public TreeWalker(ContentHandler contentHandler,
                  DOMHelper dh)

Constructor.

Parameters:

contentHandler - The implemention of the contentHandler operation (toXMLString, digest, ...)

TreeWalker

public TreeWalker(ContentHandler contentHandler)

Constructor.

Parameters:

contentHandler - The implemention of the contentHandler operation (toXMLString, digest, ...)

Method Detail

getContentHandler

public ContentHandler getContentHandler()

Get the ContentHandler used for the tree walk.

Returns:

the ContentHandler used for the tree walk

setContentHandler

public void setContentHandler(ContentHandler ch)

Get the ContentHandler used for the tree walk.

Returns:

the ContentHandler used for the tree walk

traverse

public void traverse(Node pos)
              throws SAXException

Perform a pre-order traversal non-recursive style. Note that TreeWalker assumes that the subtree is intended to represent a complete (though not necessarily well-formed) document and, during a traversal, startDocument and endDocument will always be issued to the SAX listener.

Parameters:

pos - Node in the tree where to start traversal

Throws:

TransformerException -

traverseFragment

public void traverseFragment(Node pos)
                      throws SAXException

Perform a pre-order traversal non-recursive style. In contrast to the traverse() method this method will not issue startDocument() and endDocument() events to the SAX listener.

Parameters:

pos - Node in the tree where to start traversal

Throws:

TransformerException -

traverse

public void traverse(Node pos,
                     Node top)
              throws SAXException

Perform a pre-order traversal non-recursive style. Note that TreeWalker assumes that the subtree is intended to represent a complete (though not necessarily well-formed) document and, during a traversal, startDocument and endDocument will always be issued to the SAX listener.

Parameters:

pos - Node in the tree where to start traversal

top - Node in the tree where to end traversal

Throws:

TransformerException -