org.apache.xml.dtm.ref
Class DTMNodeList

java.lang.Object
  org.apache.xml.dtm.ref.DTMNodeListBase
      org.apache.xml.dtm.ref.DTMNodeList

All Implemented Interfaces:

org.w3c.dom.NodeList

public class DTMNodeList
extends DTMNodeListBase

DTMNodeList gives us an implementation of the DOM's NodeList interface wrapped around a DTM Iterator. The author considers this something of an abominations, since NodeList was not intended to be a general purpose "list of nodes" API and is generally considered by the DOM WG to have be a mistake... but I'm told that some of the XPath/XSLT folks say they must have this solution. Please note that this is not necessarily equivlaent to a DOM NodeList operating over the same document. In particular:

• If there are several Text nodes in logical succession (ie, across CDATASection and EntityReference boundaries), we will return only the first; the caller is responsible for stepping through them. (%REVIEW% Provide a convenience routine here to assist, pending proposed DOM Level 3 getAdjacentText() operation?)
• Since the whole XPath/XSLT architecture assumes that the source document is not altered while we're working with it, we do not promise to implement the DOM NodeList's "live view" response to document mutation.

State: In progress!!

Field Summary

private DTMIterator

m_iter

Constructor Summary

private	DTMNodeList()
	DTMNodeList(DTMIterator dtmIterator) Public constructor: Wrap a DTMNodeList around an existing and preconfigured DTMIterator WARNING: THIS HAS THE SIDE EFFECT OF ISSUING setShouldCacheNodes(true) AGAINST THE DTMIterator.

Method Summary

DTMIterator	getDTMIterator() Access the wrapped DTMIterator.
int	getLength() The number of nodes in the list.
org.w3c.dom.Node	item(int index) Returns the indexth item in the collection.

Methods inherited from class java.lang.Object

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

Field Detail

m_iter

private DTMIterator m_iter

Constructor Detail

DTMNodeList

private DTMNodeList()

DTMNodeList

public DTMNodeList(DTMIterator dtmIterator)

Public constructor: Wrap a DTMNodeList around an existing and preconfigured DTMIterator WARNING: THIS HAS THE SIDE EFFECT OF ISSUING setShouldCacheNodes(true) AGAINST THE DTMIterator.

Method Detail

getDTMIterator

public DTMIterator getDTMIterator()

Access the wrapped DTMIterator. I'm not sure whether anyone will need this or not, but let's write it and think about it.

item

public org.w3c.dom.Node item(int index)

Returns the indexth item in the collection. If index is greater than or equal to the number of nodes in the list, this returns null.

Specified by:

item in interface org.w3c.dom.NodeList

Overrides:

item in class DTMNodeListBase

Parameters:

index - Index into the collection.

Returns:

The node at the indexth position in the NodeList, or null if that is not a valid index.

getLength

public int getLength()

The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive.

Specified by:

getLength in interface org.w3c.dom.NodeList

Overrides:

getLength in class DTMNodeListBase