DO NOT REPLY [Bug 22155] - Support XPath queries that return objects other than node sets.

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=22155

Support XPath queries that return objects other than node sets.

[EMAIL PROTECTED] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|CLOSED                      |REOPENED
         Resolution|FIXED                       |



------- Additional Comments From [EMAIL PROTECTED]  2004-03-05 22:51 -------
Problem in XPathQueryResolver.ResultSet.prepareNextNode() when iterating over 
Collection and empty document i.e. '<?xml version="1.0" encoding="UTF-8"?>' is 
returned. Then the node returned by the document is null and a an exception is 
thrown at xp.execute(xpc, n, pfx) -- (exception attached at end). Checking for 
node != null fixes this problem. I'm not sure though how the empty document go 
into the DB in the first place.

DBDocument d = (DBDocument) context.getDocument(keySet[keyPos++]);
// dom2str(d) == "<?xml version="1.0" encoding="UTF-8"?>"
if (d == null) {
  continue;
}
Node n = d.getDocumentElement();
// n == null
if(n == null) continue; // added to fix the problem


Exception thrown by xp.execute(xpc, n, pfx):
java.lang.IllegalArgumentException: Node must be non-null for 
getDTMHandleFromNode
        at org.apache.xml.dtm.ref.DTMManagerDefault.getDTMHandleFromNode
(DTMManagerDefault.java:543)
        at org.apache.xpath.XPathContext.getDTMHandleFromNode
(XPathContext.java:220)
        at org.apache.xpath.XPath.execute(XPath.java:274)
        at 
org.apache.xindice.core.query.XPathQueryResolver$ResultSet.prepareNextNode
(XPathQueryResolver.java:1211)
        at 
org.apache.xindice.core.query.XPathQueryResolver$ResultSet.getNextNode
(XPathQueryResolver.java:1267)
        at org.apache.xindice.core.query.QueryUtil.queryResultsToDOM
(QueryUtil.java:75)
        at org.apache.xindice.core.query.QueryUtil.queryResultsToDOM
(QueryUtil.java:134)
        at org.apache.xindice.client.xmldb.embed.CollectionImpl.query
(CollectionImpl.java:437)
        at org.apache.xindice.client.xmldb.XindiceCollection.query
(XindiceCollection.java:259)
        at org.apache.xindice.client.xmldb.services.QueryService.query
(QueryService.java:90)
        at edu.indiana.extreme.gsx.util.XindiceUtil.executeXPath
(XindiceUtil.java:514)

Thanks.
--Yogesh