org.apache.xml.dtm.ref

Class DTMChildIterNodeList

java.lang.Object

org.apache.xml.dtm.ref.DTMNodeListBase

org.apache.xml.dtm.ref.DTMChildIterNodeList

All Implemented Interfaces:

NodeList

public class DTMChildIterNodeList
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!!

Constructor Summary

Constructors

Constructor and Description
DTMChildIterNodeList(DTM parentDTM, int parentHandle) Public constructor: Create a NodeList to support DTMNodeProxy.getChildren().

Method Summary

Modifier and Type	Method and Description
int	getLength() The number of nodes in the list.
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

Constructor Detail

DTMChildIterNodeList

public DTMChildIterNodeList(DTM parentDTM,
                            int parentHandle)

Public constructor: Create a NodeList to support DTMNodeProxy.getChildren(). Unfortunately AxisIterators and DTMIterators don't share an API, so I can't use the existing Axis.CHILD iterator. Rather than create Yet Another Class, let's set up a special case of this one.

Parameters:

parentDTM - The DTM containing this node

parentHandle - DTM node-handle integer

Method Detail

item

public 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 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 NodeList

Overrides:

getLength in class DTMNodeListBase