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Question related to bug 1491444
Added by Anonymous almost 18 years ago
Legacy ID: #3765057
Legacy Poster: sk_olson (sk_olson)
I have an XSL using the "key" function, where the first argument
is calculated using a "concat" function. The lookup is done against a
separate XML file (via the "document" function). It has worked using
Saxon 8.7.1 on multiple different input XML, but I've run into one that encounters the
exact same NPE as bug 1491444. I tried the patch recommended in the bug posting, but it
also fails. The relevant snippet in class KeyManager (line 428) looks like this: List
definitions = getKeyDefinitions(fingerprint); if (definitions == null) { DynamicError de
= new DynamicError("Key fingerprint " + fingerprint + " has
not been defined"); de.setXPathContext(context);
de.setErrorCode("XTDE1260"); throw de; } KeyDefinition definition =
(KeyDefinition)definitions.get(0); I have modified the snippet from the bug post - Since
the value of the "fingerprint" variable is -1, which is invalid, the
original patch fails with a different exception as it tries to lookup the name that goes
with the fingerprint value, and there is none. Is anyone familiar with this bug that
could point me at how to diagnose why I'm getting an invalid fingerprint value of -1
while performing a key lookup? I believe the XML and XSL are ok, as I can process them
in XMLSpy and the XSL works correctly. So I'm looking for help in diagnosing why 8.7.1
gets an NPE that is caused by this invalid fingerprint value. I can post the XSL, sample
input XML, and a sample lookup XML document if it is helpful. Thanks in advance for any
info.
Legacy ID: #3773859
Legacy Poster: Michael Kay (mhkay)
Apologies for the delay in responding. For some reason SourceForge has stopped
sending me notifications of forum posts. Oon inspecting the code, there does seem to be
a remaining error that was either introduced by, or not fixed by, this patch (I haven't
checked which). On line 200 of KeyFn.java, the code MappingFunction map = new
MappingFunction() { // Map a value to the sequence of nodes having that value as a key
value public Object map(Item item) throws XPathException { return
keyManager.selectByKey( keyFingerprint, document, (AtomicValue)item, keyContext); } };
should read MappingFunction map = new MappingFunction() { // Map a value to the sequence
of nodes having that value as a key value public Object map(Item item) throws
XPathException { return keyManager.selectByKey( fprint, document, (AtomicValue)item,
keyContext); } }; Let me know if this fixes the problem: otherwise, I'll need to see a
test case that reproduces it. Michael Kay
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