org.apache.xml.serializer

Class TreeWalker

java.lang.Object

org.apache.xml.serializer.TreeWalker

public final class TreeWalker
extends Object

This class does a pre-order walk of the DOM tree, calling a ContentHandler interface as it goes. This class is a copy of the one in org.apache.xml.utils. It exists to cut the serializers dependancy on that package.

Field Summary

Fields

Modifier and Type	Field and Description
protected DOM2Helper	m_dh DomHelper for this TreeWalker

Constructor Summary

Constructors

Constructor and Description
TreeWalker(ContentHandler ch)
TreeWalker(ContentHandler contentHandler, String systemId) Constructor.

Method Summary

Modifier and Type	Method and Description
protected void	endNode(Node node) End processing of given node
ContentHandler	getContentHandler() Get the ContentHandler used for the tree walk.
protected void	startNode(Node node) Start processing given node
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.

Methods inherited from class java.lang.Object

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

Field Detail

m_dh

protected final DOM2Helper m_dh

DomHelper for this TreeWalker

Constructor Detail

TreeWalker

public TreeWalker(ContentHandler ch)

TreeWalker

public TreeWalker(ContentHandler contentHandler,
                  String systemId)

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

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

SAXException

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

SAXException

startNode

protected void startNode(Node node)
                  throws SAXException

Start processing given node

Parameters:

node - Node to process

Throws:

SAXException

endNode

protected void endNode(Node node)
                throws SAXException

End processing of given node

Parameters:

node - Node we just finished processing

Throws:

SAXException