[ http://issues.apache.org/jira/browse/XALANJ-2023?page=all ]
     
Brian Minchau closed XALANJ-2023:
---------------------------------


Ken, thanks for the reply. Closing this issue.

> NPE in org.apache.xml.serializer.ToHTMLSAXHandler
> -------------------------------------------------
>
>          Key: XALANJ-2023
>          URL: http://issues.apache.org/jira/browse/XALANJ-2023
>      Project: XalanJ2
>         Type: Bug
>   Components: Serialization
>     Versions: 2.6
>     Reporter: Ken Weiner
>      Fix For: 2.7
>  Attachments: ToHTMLSAXHandler-patch.txt, ToHTMLSAXHandler-patch2.txt
>
> On line 360 of org.apache.xml.serializer.ToHTMLSAXHandler, the code does not 
> check to see if a lexical handler has been set before trying to call a method 
> on it.  The result is the following stack strace when comments are present in 
> the XML:
> Caused by: java.lang.NullPointerException
>       at 
> org.apache.xml.serializer.ToHTMLSAXHandler.comment(ToHTMLSAXHandler.java:360)
>       at org.apache.xpath.objects.XString.dispatchAsComment(XString.java:287)
>       at 
> org.apache.xml.dtm.ref.DTMTreeWalker.startNode(DTMTreeWalker.java:233)
>       at 
> org.apache.xalan.transformer.TreeWalker2Result.startNode(TreeWalker2Result.java:144)
>       at org.apache.xml.dtm.ref.DTMTreeWalker.traverse(DTMTreeWalker.java:114)
>       at 
> org.apache.xalan.transformer.TreeWalker2Result.traverse(TreeWalker2Result.java:72)
>       at org.apache.xalan.templates.ElemCopyOf.execute(ElemCopyOf.java:185)
>       at 
> org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395)
>       at 
> org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177)
>       at 
> org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336)
>       ... 21 more
> The fix is to add the guard against a null lexical handler:
>         if (m_lexHandler != null)
>             m_lexHandler.comment(arg0, arg1, arg2);
> This guard has been added in the similar comment() method of the 
> ToXMLSAXHandler class in the same package.
> Possible workaround: Create a dummy LexicalHandler implementation and set 
> that on the XMLReader before attempting the transformation.

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