[XALANJ-957] XPathAPI.selectSingleNode() can't select a node relative to a node that is not the document's root

• Type: Bug
• Status: Resolved
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Component/s: XPath
• Environment: Operating System: Other; Platform: All
• Bugzilla Id: 7976
• Assignee: Unassigned
• Reporter: brobinson
• Created: 12/Apr/02 01:07
• Updated: 16/Feb/11 23:01
• Resolved: 02/Sep/04 21:15

Description

I'm having trouble with XPathAPI.selectSingleNode().

My document:

<?xml version="1.0"?>
<encryption-service>
<encryption-scheme name="sample"
algorithm="DES"
provider="SunJCE"
provider-class="com.sun.crypto.provider.SunJCE"
key-size="56"
key-store-type="JCEKS"/>
</encryption-service>

When getNode() returns the node that represents 'encryption-scheme', the
following two calls return null:

Node node = XPathAPI.selectSingleNode( getNode(),
"attribute::algorithm" );
Node node = XPathAPI.selectSingleNode( getNode(),
"/attribute::algorithm" );

But this call works:

Node node = XPathAPI.selectSingleNode( getNode(),
"/encryption-service/encryption-scheme/attribute::algorithm" );

It seems that the xpath expression is being evaluated relative to the root
of the document, even though I'm passing in a node that is not the root.
I've seen there is another signature for selectSingleNode() that takes a
namespace node, but I have no idea how to use it. If using this call is my
answer, can someone describe how to do this?