The items in the NodeList
are accessible via an integral
* index, starting from 0.
*
*/
public class DOMNodeListByTagNameImpl implements org.w3c.dom.NodeList {
private Node first = null;
private String tagName = "*";
private int currIndex = 0;
private int maxIndex = 0;
private Node currNode = null;
protected DOMNodeListByTagNameImpl(Node first, String tagName)
{
this.first = first;
this.tagName = tagName;
}
/**
* @see org.w3c.dom.NodeList#item
*/
public org.w3c.dom.Node item(int index)
{
currIndex = 0;
maxIndex = index;
preTraverse(first);
if (currIndex > maxIndex && currNode != null)
return currNode.getAdapter();
else
return null;
}
/**
* @see org.w3c.dom.NodeList#getLength
*/
public int getLength()
{
currIndex = 0;
maxIndex = Integer.MAX_VALUE;
preTraverse(first);
return currIndex;
}
protected void preTraverse(Node node)
{
if (node == null)
return;
if (node.type == Node.StartTag || node.type == Node.StartEndTag)
{
if (currIndex <= maxIndex &&
(tagName.equals("*") || tagName.equals(node.element)))
{
currIndex += 1;
currNode = node;
}
}
if (currIndex > maxIndex)
return;
node = node.content;
while (node != null)
{
preTraverse(node);
node = node.next;
}
}
}