/**
* Moves the <code>TreeWalker</code> to the next visible node in document order relative to the
* current node, and returns the new node. If the current node has no next node, or if the search
* for nextNode attempts to step upward from the TreeWalker's root node, returns <code>null</code>
* , and retains the current node.
*
* @return The new node, or <code>null</code> if the current node has no next node in the
* TreeWalker's logical view.
*/
public int nextNode() {
int nextNode = DTM.NULL;
AxesWalker walker = wi().getLastUsedWalker();
while (true) {
if (null == walker) break;
nextNode = walker.getNextNode();
if (DTM.NULL == nextNode) {
walker = walker.m_prevWalker;
} else {
if (walker.acceptNode(nextNode) != DTMIterator.FILTER_ACCEPT) {
continue;
}
if (null == walker.m_nextWalker) {
wi().setLastUsedWalker(walker);
// return walker.returnNextNode(nextNode);
break;
} else {
AxesWalker prev = walker;
walker = walker.m_nextWalker;
walker.setRoot(nextNode);
walker.m_prevWalker = prev;
continue;
}
} // if(null != nextNode)
} // while(null != walker)
return nextNode;
}
/**
* Set the root node of the TreeWalker. (Not part of the DOM2 TreeWalker interface).
*
* @param root The context node of this step.
*/
public void setRoot(int root) {
super.setRoot(root);
m_iterator = getDTM(root).getAxisIterator(m_axis);
m_iterator.setStartNode(root);
}
