[jira] Commented: (XALANJ-2301) NPE in ElemTemplateElement for a ElemSort as part of an ElemForEach when dynamically generating a Templates

["Henry Zongaro (JIRA)" <xa...@xml.apache.org>]

    [ http://issues.apache.org/jira/browse/XALANJ-2301?page=comments#action_12417818 ] 

Henry Zongaro commented on XALANJ-2301:
---------------------------------------

It looks like the problem occurs if an xsl:sort element (within either xsl:apply-templates or xsl:for-each) has a namespace declaration.  One work-around would be to move the namespace declaration to the instruction that contains the xsl:sort; another work-around would be to use XSLTC.

By the way, in case you're wondering why you had to wait so long for any comments on this bug report to appear, it makes it much easier to track down the source of a problem if you provide a complete stand-alone test case that demonstrates the problem.

> NPE in ElemTemplateElement for a ElemSort as part of an ElemForEach when dynamically generating a Templates
> -----------------------------------------------------------------------------------------------------------
>
>          Key: XALANJ-2301
>          URL: http://issues.apache.org/jira/browse/XALANJ-2301
>      Project: XalanJ2
>         Type: Bug

>     Versions: 2.7
>     Reporter: peter royal
>  Attachments: j2301.out, j2301.xml, j2301.xsl
>
> The XSL fragment that created this is:
> <xsl:apply-templates select="something>
>     <xsl:sort select="@something"/>
> </xsl:apply-templates>
> resulting in:
> java.lang.NullPointerException
> 	at org.apache.xalan.templates.ElemTemplateElement.getStylesheetRoot(ElemTemplateElement.java:171)
> 	at org.apache.xalan.templates.ElemTemplateElement.resolvePrefixTables(ElemTemplateElement.java:1033)
> 	at org.apache.xalan.templates.ElemTemplateElement.compose(ElemTemplateElement.java:190)
> 	at org.apache.xalan.templates.ElemSort.compose(ElemSort.java:333)
> 	at org.apache.xalan.templates.ElemForEach.compose(ElemForEach.java:136)
> 	at org.apache.xalan.templates.ElemCallTemplate.compose(ElemCallTemplate.java:113)
> 	at org.apache.xalan.templates.ElemApplyTemplates.compose(ElemApplyTemplates.java:127)
> 	at org.apache.xalan.templates.StylesheetRoot.composeTemplates(StylesheetRoot.java:357)
> 	at org.apache.xalan.templates.StylesheetRoot.composeTemplates(StylesheetRoot.java:362)
> 	at org.apache.xalan.templates.StylesheetRoot.composeTemplates(StylesheetRoot.java:362)
> 	at org.apache.xalan.templates.StylesheetRoot.composeTemplates(StylesheetRoot.java:362)
> 	at org.apache.xalan.templates.StylesheetRoot.composeTemplates(StylesheetRoot.java:362)
> 	at org.apache.xalan.templates.StylesheetRoot.composeTemplates(StylesheetRoot.java:362)
> 	at org.apache.xalan.templates.StylesheetRoot.recompose(StylesheetRoot.java:337)
> 	at org.apache.xalan.processor.StylesheetHandler.endDocument(StylesheetHandler.java:468)
>          ... then enters my code
> ... this occurs because the ElemSort has a single entry in its m_declaredPrefixes vector, an entry for 'xsl'.
> A 1-line fix to ElemForEach.java fixes this. In appendChild, when adding a sort element, just add:
> newChild.setParentElem( this );
> before returning the newChild.

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