/**
* Return an IntegerArray for the DOM Node which has the given id.
*
* @param id The id
* @return A IntegerArray representing the Node whose id is the given value.
*/
public IntegerArray getDOMNodeById(String id) {
IntegerArray nodes = null;
if (_enhancedDOM != null) {
int ident = _enhancedDOM.getElementById(id);
if (ident != DTM.NULL) {
Integer root = new Integer(_enhancedDOM.getDocument());
Hashtable index = (Hashtable) _rootToIndexMap.get(root);
if (index == null) {
index = new Hashtable();
_rootToIndexMap.put(root, index);
} else {
nodes = (IntegerArray) index.get(id);
}
if (nodes == null) {
nodes = new IntegerArray();
index.put(id, nodes);
}
nodes.add(_enhancedDOM.getNodeHandle(ident));
}
}
return nodes;
}
/**
* Given a context node and the argument to the XPath <code>id</code> function, checks whether the
* context node is in the set of nodes that results from that reference to the <code>id</code>
* function. This is used in the implementation of <code>id</code> patterns.
*
* @param node The context node
* @param value The argument to the <code>id</code> function
* @return <code>1</code> if the context node is in the set of nodes returned by the reference to
* the <code>id</code> function; <code>0</code>, otherwise
*/
public int containsID(int node, Object value) {
final String string = (String) value;
int rootHandle = _dom.getAxisIterator(Axis.ROOT).setStartNode(node).next();
// Get the mapping table for the document containing the context node
Hashtable index = (Hashtable) _rootToIndexMap.get(new Integer(rootHandle));
// Split argument to id function into XML whitespace separated tokens
final StringTokenizer values = new StringTokenizer(string, " \n\t");
while (values.hasMoreElements()) {
final String token = (String) values.nextElement();
IntegerArray nodes = null;
if (index != null) {
nodes = (IntegerArray) index.get(token);
}
// If input was from W3C DOM, use DOM's getElementById to do
// the look-up.
if (nodes == null && _enhancedDOM != null && _enhancedDOM.hasDOMSource()) {
nodes = getDOMNodeById(token);
}
// Did we find the context node in the set of nodes?
if (nodes != null && nodes.indexOf(node) >= 0) {
return 1;
}
}
// Didn't find the context node in the set of nodes returned by id
return 0;
}
/**
* This method must be called by the code generated by the id() function prior to returning the
* node iterator. The lookup code for key() and id() differ in the way the lookup value can be
* whitespace separated list of tokens for the id() function, but a single string for the key()
* function.
*
* @deprecated
*/
public void lookupId(Object value) {
// Clear _nodes array
_nodes = null;
final StringTokenizer values = new StringTokenizer((String) value, " \n\t");
while (values.hasMoreElements()) {
final String token = (String) values.nextElement();
IntegerArray nodes = (IntegerArray) _index.get(token);
if (nodes == null && _enhancedDOM != null && _enhancedDOM.hasDOMSource()) {
nodes = getDOMNodeById(token);
}
if (nodes == null) continue;
if (_nodes == null) {
nodes = (IntegerArray) nodes.clone();
_nodes = nodes;
} else {
_nodes.merge(nodes);
}
}
}