1.
File: org.apache.xindice.core.query.XPathQueryResolver.ResultSet.prepareNextNode():1195
Version: Xindice 1.1b4-dev (checked out of CVS on 2004-03-05)

Added:
                DBDocument d = (DBDocument) context.getDocument(keySet[keyPos++]);
                if (d == null) {
                    continue;
                }

                Node n = d.getDocumentElement();
>>>             if(n == null) continue; // +++ ysimmhan. fixes problem when empty document seen (<?xml ...?>)
                XPathContext xpc = new XPathContext();
                PrefixResolver pfx;
                if (pr == null) {
                    pfx = new PrefixResolverDefault(d.getDocumentElement());
                    xp = new XPath(query, null, pfx, XPath.SELECT, errors);
                } else {
                    pfx = pr;
                    if (xp == null) {
                        xp = new XPath(query, null, pfx, XPath.SELECT, errors);
                    }
                }

Reason:
	When an XPath query is run against an empty document of the form 
'<?xml version="1.0" encoding="UTF-8"?>', then Node 'n' is null and an exception 
is thrown later when using it. This fixes the problem.
For more information, refer bug report: 
	http://nagoya.apache.org/bugzilla/show_bug.cgi?id=22155

_______________________________________________
Yogesh L. Simmhan
ysimmhan@cs.indiana.edu