DTMTreeWalker (Xalan-Java 2.7.2)

java.lang.Object
- org.apache.xml.dtm.ref.DTMTreeWalker

Direct Known Subclasses:

TreeWalker2Result
```
public class DTMTreeWalker
extends java.lang.Object
```
This class does a pre-order walk of the DTM tree, calling a ContentHandler interface as it goes. As such, it's more like the Visitor design pattern than like the DOM's TreeWalker. I think normally this class should not be needed, because of DTM#dispatchToEvents.

Constructor Summary

Constructors
Constructor Description

DTMTreeWalker()
Constructor.

DTMTreeWalker(org.xml.sax.ContentHandler contentHandler, DTM dtm)
Constructor.

Constructors
Constructor	Description
`DTMTreeWalker()`	Constructor.
`DTMTreeWalker(org.xml.sax.ContentHandler contentHandler, DTM dtm)`	Constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`org.xml.sax.ContentHandler`	`getcontentHandler()`	Get the ContentHandler used for the tree walk.
`void`	`setcontentHandler(org.xml.sax.ContentHandler ch)`	Set the ContentHandler used for the tree walk.
`void`	`setDTM(DTM dtm)`	Set the DTM to be traversed.
`void`	`traverse(int pos)`	Perform a non-recursive pre-order/post-order traversal, operating as a Visitor. startNode (preorder) and endNode (postorder) are invoked for each node as we traverse over them, with the result that the node is written out to m_contentHandler.
`void`	`traverse(int pos, int top)`	Perform a non-recursive pre-order/post-order traversal, operating as a Visitor. startNode (preorder) and endNode (postorder) are invoked for each node as we traverse over them, with the result that the node is written out to m_contentHandler.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - DTMTreeWalker
```
public DTMTreeWalker()
```
    Constructor.
  - DTMTreeWalker
```
public DTMTreeWalker(org.xml.sax.ContentHandler contentHandler,
                     DTM dtm)
```
    Constructor.
    
    Parameters:
    
    contentHandler - The implemention of the contentHandler operation (toXMLString, digest, ...)
- Method Detail
  - setDTM
```
public void setDTM(DTM dtm)
```
    Set the DTM to be traversed.
    
    Parameters:
    
    dtm - The Document Table Model to be used.
  - getcontentHandler
```
public org.xml.sax.ContentHandler getcontentHandler()
```
    Get the ContentHandler used for the tree walk.
    
    Returns:
    
    the ContentHandler used for the tree walk
  - setcontentHandler
```
public void setcontentHandler(org.xml.sax.ContentHandler ch)
```
    Set the ContentHandler used for the tree walk.
    
    Parameters:
    
    ch - the ContentHandler to be the result of the tree walk.
  - traverse
```
public void traverse(int pos)
              throws org.xml.sax.SAXException
```
    Perform a non-recursive pre-order/post-order traversal, operating as a Visitor. startNode (preorder) and endNode (postorder) are invoked for each node as we traverse over them, with the result that the node is written out to m_contentHandler.
    
    Parameters:
    
    pos - Node in the tree at which to start (and end) traversal -- in other words, the root of the subtree to traverse over.
    
    Throws:
    
    TransformerException
    
    org.xml.sax.SAXException
  - traverse
```
public void traverse(int pos,
                     int top)
              throws org.xml.sax.SAXException
```
    Perform a non-recursive pre-order/post-order traversal, operating as a Visitor. startNode (preorder) and endNode (postorder) are invoked for each node as we traverse over them, with the result that the node is written out to m_contentHandler.
    
    Parameters:
    
    pos - Node in the tree where to start traversal
    
    top - Node in the tree where to end traversal. If top==DTM.NULL, run through end of document.
    
    Throws:
    
    TransformerException
    
    org.xml.sax.SAXException

Class DTMTreeWalker

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

DTMTreeWalker

DTMTreeWalker

Method Detail

setDTM

getcontentHandler

setcontentHandler

traverse

traverse