Thats me again with the same problem I outlined earlier.
If I have an Jaxen XPATH that looks like the following:
'$result > 10'
And I have a VariableContext set in the engine that returns, for instance, a
String("4") or a Double(4.0), Jaxen is going to throw a ClassCastException
because it is relying on the Java Comparator of Primitive Objects (Integer,
String, Double, etc). From the XPATH expression, 10 is an Integer(10) and
Integer.compare(String("10")) is going to throw the exception.
My question is: Is this a Jaxen bug since it is not properly handling the
object comparations properly? Or are there specific requirements on what
types can be returned by VariableContext implementations?
In addition, if the VariableContext returns 'null' it is Jaxen is going to
throw NullPointerException. Shouldnt Jaxen check for nulls in this case?
-----Original Message-----
From: Christian Nentwich [mailto:[EMAIL PROTECTED]]
Sent: Monday, December 10, 2001 15:51
To: [EMAIL PROTECTED]
Subject: [Jaxen] bug in Jaxen 1.0 beta 7
Dear all,
first of all, thanks for Jaxen and Saxpath. Good XPath implementations
are rare, and my benchmarks indicate that Jaxen is up to 10 times faster
than Xalan, so Jaxen qualifies as 'good' :)
However, there seems to be a problem with your predicate evaluation.
Here's a sample XML document for recreating the problem.
<?xml version='1.0'?>
<foo>
<bar>
<baz/>
<baz/>
<baz/>
</bar>
<bar>
<baz/>
<baz/>
<baz/>
</bar>
</foo>
If you execute "/foo/bar/baz[1]" on this document, Jaxen returns a list
of size 1, presumably containing the very first "baz". The correct
behavior should be to return a list containing the first baz in the
first bar and the first baz in the second bar, i.e. a list of size 2.
I suspect that Jaxen filters its nodes at the very end after retrieving
all nodes into a list, instead of filtering the nodes collected at every
step?
Christian
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