[XALANJ-2513] TransformerException: NullPointerException with Java 1.6 on AIX

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 2.7.1
• Component/s: transformation, Xalan
• Security Level: No security risk; visible to anyone (Ordinary problems in Xalan projects. Anybody can view the issue.)
• Environment: AIX 5.2, IBM SDK Version 6, Xalan-J 2.7.1
• Assignee: Unassigned
• Reporter: Robert Quan
• Created: 12/Jan/10 17:26
• Updated: 13/Jan/10 14:30
• Resolved: 13/Jan/10 14:30

Description

Attempting to use trax to perform a transformation using IBM SDK Java 6 on AIX will result in a TransformerException: java.null.NullPointerException. If one was to use IBM Java 5, the transformation will run without issue.

The following details the data required to reproduce the issue:

Stylesheet (sort.xsl) - Note that the stylesheet will be precompiled into a translet in a jar called ipteXslTranslets.jar
-----------------------------------------------------------------------------------------------------------------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:stylesheet [
<!ENTITY nbsp " "> <!-- NO-BREAK SPACE -->
]>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<xsl:output method="html" indent="yes" />

<xsl:param name="rowstart">1</xsl:param>
<xsl:param name="rowlimit">20</xsl:param>
<xsl:param name="sortcolumn">5</xsl:param>
<xsl:param name="sorttype">number</xsl:param>
<xsl:param name="sortorder">descending</xsl:param>

<xsl:template match="/">
<xsl:apply-templates />
</xsl:template>

<xsl:template match="*/p">
<xsl:copy-of select="." />
</xsl:template>

<xsl:template match="*/pre">
<xsl:copy-of select="." />
</xsl:template>

<xsl:template match='*/table[@class="summary"]'>
<xsl:copy-of select="." />
</xsl:template>

<xsl:template name="getActualRowstart">
<xsl:param name="totalrows" />
<xsl:choose>
<xsl:when test="0 = $totalrows">
<xsl:text>0</xsl:text>
</xsl:when>
<xsl:when test="$rowstart > $totalrows">
<xsl:value-of select="(floor(($totalrows - 1) div $rowlimit) * $rowlimit) + 1"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$rowstart"/>
</xsl:otherwise>
</xsl:choose>
</xsl:template>

<xsl:template match='*/table[@class="formatted"]'>
<xsl:variable name="totalrows"><xsl:value-of select="count(tbody/tr)" /></xsl:variable>
<xsl:variable name="actualRowstart">
<xsl:call-template name="getActualRowstart">
<xsl:with-param name="totalrows" select="$totalrows"/>
</xsl:call-template>
</xsl:variable>
<xsl:copy>
<xsl:copy-of select="@*" />
<xsl:apply-templates />
</xsl:copy>
<div class="table-metadata" style="display: none;">
<span class="table-metadata-total-rows"><xsl:value-of select="$totalrows" /></span>
</div>
<div class="table-metadata" style="display: none;">
<span class="table-metadata-row-start"><xsl:value-of select="$actualRowstart" /></span>
</div>
</xsl:template>

<xsl:template match="thead|tfoot">
<xsl:copy-of select="." />
</xsl:template>

<xsl:template match="tbody">
<xsl:variable name="totalrows"><xsl:value-of select="count(tr)" /></xsl:variable>
<xsl:variable name="actualRowstart">
<xsl:call-template name="getActualRowstart">
<xsl:with-param name="totalrows" select="$totalrows"/>
</xsl:call-template>
</xsl:variable>
<tbody>
<xsl:for-each select="tr">
<xsl:sort select="td[position() = $sortcolumn]" order="{$sortorder}" data-type="{$sorttype}" />
<xsl:if test="position() >= $actualRowstart and position() < $actualRowstart + $rowlimit">
<xsl:element name="tr">
<xsl:choose>
<xsl:when test="position() mod 2 = 1">
<xsl:attribute name="class">shaded</xsl:attribute>
</xsl:when>
</xsl:choose>
<xsl:copy-of select="*" />
</xsl:element>
</xsl:if>
</xsl:for-each>
</tbody>
</xsl:template>

</xsl:stylesheet>

Input XML data (0.xml)
------------------------------
<div>
<BR/><table xmlns:java="http://xml.apache.org/xslt/java" class="summary" cellSpacing="0" width="400" border="0">
<tr>
<td>Elapsed Time (hh:mm:ss): 00:01:20</td>
</tr>
<tr>
<td>VLAN 530</td>
</tr>
</table><table xmlns:java="http://xml.apache.org/xslt/java" class="formatted" width="600">
<thead>
<th class="columnHeader sortAsText" width="16%">Address</th><th class="columnHeader sortAsNumbers" width="12%"><a href="" onclick="return(top.graphSingleTimestampResults('graphName=top-talk-grph|desc=SmartSight Top Talkers by MAC for VLAN 530|cir=10000|dir=|dataSetIndex=1|count=3|label1=0011.434E.8044|value1=0.0|label2=0012.F01A.ED76|value2=0.0|label3=0003.FEAB.6C23|value3=0.0|deviceId=2'));">Bit Rate
(Mbps)</a></th><th class="columnHeader sortAsNumbers" width="12%">Utilization
(% of CIR)</th><th class="columnHeader sortAsNumbers" width="12%">Pkt Rate (pkts/sec)</th><th class="columnHeader sortAsNumbers" width="12%">Total Bit Count (Mb)</th><th class="columnHeader sortAsNumbers" width="12%">Total Pkt Count</th>
</thead>
<tbody>
<tr class="shaded">
<td class="rowDataLeft">0011.434E.8044</td><td class="rowDataRight">0.000</td><td class="rowDataRight">0.000</td><td class="rowDataRight">0.433</td><td class="rowDataRight">0.026</td><td class="rowDataRight">32</td>
</tr>
<tr class="">
<td class="rowDataLeft">0012.F01A.ED76</td><td class="rowDataRight">0.000</td><td class="rowDataRight">0.000</td><td class="rowDataRight">0.200</td><td class="rowDataRight">0.014</td><td class="rowDataRight">16</td>
</tr>
<tr class="shaded">
<td class="rowDataLeft">0003.FEAB.6C23</td><td class="rowDataRight">0.000</td><td class="rowDataRight">0.000</td><td class="rowDataRight">0.500</td><td class="rowDataRight">0.023</td><td class="rowDataRight">40</td>
</tr>
</tbody>
</table>
</div>

Source Code (XsltTest.java)
--------------------------------------
package test.xslt;

import java.io.File;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import javax.xml.transform.Templates;

/**
*

• @author dmalykhanov
  */
  public class XsltTest {

private TransformerFactory tf;

//static

{ // System.setProperty( // "javax.xml.transform.TransformerFactory", // "org.apache.xalan.xsltc.trax.TransformerFactoryImpl" // ); //}

public static void main(String... args) throws Exception

{ XsltTest app = new XsltTest(); System.exit(app.run(args)); }

private int run(String[] args) throws Exception

{ tf = TransformerFactory.newInstance(); tf.setAttribute("use-classpath", Boolean.TRUE); Transformer xslp = tf.newTransformer(new StreamSource(args[1])); xslp.transform(new StreamSource(new File(args[0])), new StreamResult(System.out)); return 0; }

}

Shell script used to run transformation
----------------------------------------------------
#!/bin/sh

CLASSPATH='.:/spirent/metro/5.000/IPTE/ipte/WEB-INF/lib/ipteXslTranslets.jar:/afs/hekimian.com/cm-cots/ALL-OS/xalan-j/2.7.1-CM1/xalan.jar:/afs/hekimian.com/cm-cots/ALL-OS/xalan-j/2.7.1-CM1/serializer.jar:/afs/hekimian.com/cm-cots/ALL-OS/xalan-j/2.7.1-CM1/xercesImpl.jar:/afs/hekimian.com/cm-cots/ALL-OS/xalan-j/2.7.1-CM1/xml-apis.jar:'

export CLASSPATH

exec /spirent/cots/java/1.6/jre/bin/java \
-Djaxp.debug=1 \
-Djavax.xml.transform.TransformerFactory=org.apache.xalan.xsltc.trax.TransformerFactoryImpl \
-Djavax.xml.parsers.DocumentBuilderFactory=org.apache.xerces.jaxp.DocumentBuilderFactoryImpl \
-Djavax.xml.parsers.SAXParserFactory=org.apache.xerces.jaxp.SAXParserFactoryImpl \
test.xslt.XsltTest "$@"

• • Note: ipteXslTranslets.jar contains the precompiled stylesheet sort.xsl
  • Note: Commenting out the directive to reassign the TransformerFactory to trax.TransformerFactoryImpl will not generate the exception and the transformation will work

Command line command to run the transformation
----------------------------------------------------------------------
$ run.sh 0.xml sort

• • Note: 0.xml contains the input xml as provided above
  • Note: sort is the precompiled translet class for the stylesheet provided above