set:distinct() over attribute list breaks XSLTC throwing HIERARCHY_REQUEST_ERR
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Key: XALANJ-2424
URL: https://issues.apache.org/jira/browse/XALANJ-2424
Project: XalanJ2
Issue Type: Bug
Components: XSLTC
Affects Versions: 2.7, 2.7.1
Environment: Linux, Sun java 1.6
Reporter: Илья Казначеев
If you do set:distinct over attribute list, XSLTC-compiled translet throws
HIERARCHY_REQUEST_ERR exception.
Exception is localised to point where set:distinct is called, even if it is
assigned into a variable.
Test case:
<code><pre><tt><xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:set="http://exslt.org/sets"; version="1.0">
<xsl:output method="html" />
<xsl:template match="/">
<xsl:variable name="attrs"
select="set:distinct(source/element/@attr)" />
<html><body>
<xsl:for-each select="$attrs">
<xsl:value-of select="." />
</xsl:for-each>
</body></html>
</xsl:template>
</xsl:stylesheet></tt></pre></code>
With xml
<code><pre><tt><source>
<element attr="val1" name="foobar" />
<element attr="val2" name="bar" />
<element attr="val2" name="baz" />
<element attr="val3" name="baz" />
</source></tt></pre></code>
that will cause an Exception to be thrown when variable is assigned.
My unedicated guess is that it tries to apply-templates over selected nodes
into document in place where set:distinct is computed. This happens, as I see
for different partially-serialized document, before variable's enclosing
element is closed. I've disassembled the stylesheet but didn't understand much
from there, it goes like this:
<code><pre><tt> // 30 66:invokeinterface #110 <Method
org.w3c.dom.NodeList DOM.makeNodeList(DTMAxisIterator)>
// 31 71:invokestatic #116 <Method org.w3c.dom.NodeList
ExsltSets.distinct(org.w3c.dom.NodeList)>
// 32 74:aload_0
// 33 75:aload_1
// 34 76:invokestatic #122 <Method DTMAxisIterator
BasisLibrary.nodeList2Iterator(org.w3c.dom.NodeList,
org.apache.xalan.xsltc.Translet, DOM)>
// 35 79:new #126 <Class CachedNodeListIterator>
// 36 82:dup_x1
// 37 83:swap
// 38 84:invokespecial #127 <Method void
CachedNodeListIterator(DTMAxisIterator)>
// 39 87:iload 4
// 40 89:invokeinterface #41 <Method DTMAxisIterator
DTMAxisIterator.setStartNode(int)>
// 41 94:astore 9
// 42 96:aload_3
// 43 97:ldc1 #129 <String "html">
// 44 99:dup2
// 45 100:invokeinterface #14 <Method void
SerializationHandler.startElement(String)></tt></pre></code>
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