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From "Ross Gardler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (COMDEV-4) External entity in XML causing null pointer exception during DocumentBuilder.parse
Date Fri, 04 Dec 2009 11:48:20 GMT

    [ https://issues.apache.org/jira/browse/COMDEV-4?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12785892#action_12785892
] 

Ross Gardler commented on COMDEV-4:
-----------------------------------

This tracker is for the Community Development project at Apache (see http://community.apache.org),
we are here to help people understand how to get involved with Apache projects.

Can you please indicate which projects code you are working with, we can then point you in
the right direction.

> External entity in XML causing null pointer exception during DocumentBuilder.parse
> ----------------------------------------------------------------------------------
>
>                 Key: COMDEV-4
>                 URL: https://issues.apache.org/jira/browse/COMDEV-4
>             Project:  	 Community Development 
>          Issue Type: Question
>            Reporter: sri kumar 
>
> I was trying to parse a XML Document using DOM Parser.
> I got null pointer exception while executing doc = builder.parse(xmlDataFile);
> There were few entities in the XML data file. On removing a particular entity, i was
able to parse the file successfully
> The entity was some thing like this
> <!ENTITY SAMPLE.TIF SYSTEM "SAMPLE.TIF" NDATA TIF>
> What could be the reason?
> EDIT:
> Here is the code:
>         DocumentBuilderFactory aFactory = DocumentBuilderFactory.newInstance();
>         aFactory.setValidating(false);
>         aFactory.setFeature("http://xml.org/sax/features/namespaces", false);
>         aFactory.setFeature("http://apache.org/xml/features/validation/schema", false);
>         aFactory.setIgnoringComments(true);
>         builder = aFactory.newDocumentBuilder();
>         doc = builder.parse(xmlDataFile);
> This is the trace:
>  at com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl.setChunkIndex(DeferredDocumentImpl.java:1944)
>     at com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl.appendChild(DeferredDocumentImpl.java:644)
>     at com.sun.org.apache.xerces.internal.parsers.AbstractDOMParser.characters(AbstractDOMParser.java:1191)
>     at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.characters(XMLDTDValidator.java:862)
>     at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:463)
>     at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
>     at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
>     at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
>     at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:225)
>     at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:283)
>     at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:180)
>     at XMLParser.Parse(XMLParser.java:89)
>     at Main.main(Main.java:116)
> 89 line number points to -> doc = builder.parse(xmlDataFile);

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