/**
* Execute the function. The function must return a valid object.
*
* @param xctxt The current execution context.
* @return A valid XObject.
* @throws javax.xml.transform.TransformerException
*/
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException {
SubContextList subContextList = xctxt.getCurrentNodeList();
int currentNode = DTM.NULL;
if (null != subContextList) {
if (subContextList instanceof PredicatedNodeTest) {
LocPathIterator iter = ((PredicatedNodeTest) subContextList).getLocPathIterator();
currentNode = iter.getCurrentContextNode();
} else if (subContextList instanceof StepPattern) {
throw new RuntimeException(
XSLMessages.createMessage(XSLTErrorResources.ER_PROCESSOR_ERROR, null));
}
} else {
// not predicate => ContextNode == CurrentNode
currentNode = xctxt.getContextNode();
}
return new XNodeSet(currentNode, xctxt.getDTMManager());
}
/**
* Process the LocPathIterator to see if it contains variables or functions that may make it
* context dependent.
*
* @param path LocPathIterator that is assumed to be absolute, but needs checking.
* @return true if the path is confirmed to be absolute, false if it may contain context
* dependencies.
*/
public boolean checkAbsolute(LocPathIterator path) {
m_isAbs = true;
path.callVisitors(null, this);
return m_isAbs;
}