Hi,
I'm trying to 'collect' nodes in a org.apache.xpath.NodeSet using Xalan
Extensions and found out a strange behaviour, which looks like a bug to
me.
I'm using this XML file:
items.xml:
==========
<?xml version="1.0" encoding="ISO-8859-1"?>
<items>
<item name="a">xa</item>
<item name="b">xb</item>
<item name="c">xc</item>
<item name="d">xd</item>
</items>
and this stylesheet:
collectortest.xsl:
==================
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; version="1.0"
xmlns:coll="xalan://NodeCollector" exclude-result-prefixes="xalan coll">
<xsl:template match="/">
<out>
<xsl:value-of select="coll:add(//item[@name='b'])"/>
<xsl:value-of select="coll:add(//item[@name='a'])"/>
<xsl:value-of select="coll:add(//item[@name='c'])"/>
<xsl:value-of select="coll:add(//item[@name='a'])"/>
<xsl:value-of select="coll:add(//item[@name='b'])"/>
<xsl:for-each select="coll:getNodes()">
:<xsl:value-of select="@name"/>
</xsl:for-each>
</out>
</xsl:template>
</xsl:stylesheet>
and this Extension:
NodeCollector.java:
===================
import java.io.*;
import org.apache.xpath.NodeSet;
import org.w3c.dom.*;
public class NodeCollector
{
private NodeSet nodeset = new NodeSet();
public NodeCollector() {
System.err.println("-----> NodeCollector instantiated");
}
public void add(NodeList nodes) {
System.err.println("-----> called add, "+nodes.getLength()+" nodes");
nodeset.addNodes(nodes);
}
public NodeSet getNodes() {
System.err.println("-----> called getNodes, size: " + nodeset.size());
return nodeset;
}
}
The interesting part follows now:
Using xalan-j_2_1_0, I get this output:
-----> NodeCollector instantiated
-----> called add, 1 nodes
-----> called add, 1 nodes
-----> called add, 1 nodes
-----> called add, 1 nodes
-----> called add, 1 nodes
-----> called getNodes, size: 5
<?xml version="1.0" encoding="UTF-8"?>
<out>
:b
:a
:c
:a
:b</out>
This is what I expect (and want) to get...
but, using xalan-j_2_2_D10 or nightly builds, I get:
<?xml version="1.0" encoding="UTF-8"?>
-----> NodeCollector instantiated
-----> called add, 1 nodes
-----> called add, 1 nodes
-----> called add, 1 nodes
-----> called add, 1 nodes
-----> called add, 1 nodes
-----> called getNodes, size: 5
<out>
:a
:b
:c</out>
i.e. sorted and duplicates eliminated...
Since the getNodes()-size is 5, the NodeSet seems to be ok, and this
'error' is originating elsewhere (in the DTM ??)
I even tried a NodeList (which doesn't seem to work in 2_1_0, but it
didn't change anything.
So, is this a bug or a feature ? ;)
If it is intended, how do I manage to get my 'wanted' output ?
Thanks and regards,
Patrick
--
* Dipl.-Inform. Patrick Lay
* Institut f�r Informatik III Phone +49 (228) 73-4537
* Universit�t Bonn Fax +49 (228) 73-4382
* R�merstra�e 164 [EMAIL PROTECTED]
* D-53117 Bonn (Germany) http://www.informatik.uni-bonn.de/~lay/
