Re: DOMWrite an HTMLDocument

Hi Roger,

See comments below...

At 11:30 PM 7/9/2003 -0300, you wrote:
> Hey Barracuda wizards!
>
> I'm updating an application from Barracuda 0.something to Barracuda 1.2 
> and I got stuck on this:
>
> --
> java.lang.NullPointerException
>         at 
> org.enhydra.xml.io.BaseDOMFormatter.getEncoding(BaseDOMFormatter.java:326)
>         at org.enhydra.xml.io.BaseDOMFormatter.(BaseDOMFormatter.java:374)
>         at org.enhydra.xml.io.HTMLFormatter.(HTMLFormatter.java:99)
>         at 
> org.enhydra.xml.io.DOMFormatter.getFormatter(DOMFormatter.java:156)
>         at org.enhydra.xml.io.DOMFormatter.write(DOMFormatter.java:192)
>         at 
> org.enhydra.barracuda.core.util.dom.DefaultDOMWriter.write(DefaultDOMWriter.java:181)
>         at 
> org.enhydra.barracuda.core.util.dom.DefaultDOMWriter.write(DefaultDOMWriter.java:146)
>         at 
> lsb.presentation.screens.WizardScreen$RenderTabPreviewHandler.handleViewEvent(WizardScreen.java:336)
> --

Hmm... curious.  Looks like it has more to do with XMLC than Barracuda, 
though.  As such, I'm cc'ing the XMLC list.

> when writing an HTMLDocument with DefaultDOMWriter.
>
> Do you guys have an idea what it could be? The reduced testcase is:
>
> HTMLDocument themeDoc = 
> org.enhydra.xml.xmlc.html.HTMLDocumentFactory.createBasicDocument();
> new DefaultDOMWriter().write(themeDoc, context.getResponse());

What exactly are you trying to do?  createBasicDocument() will create an 
empty HTMLDocument.  Why would you want to write that immediately to 
output?  It still shouldn't fail with a NullPointerException in 
BaseDOMFormatter, however.  Looks like it bombs on the second line below...

} else if (document instanceof XMLObjectLink) {
        encoding = ((XMLObjectLink)document).getXMLObject().getEncoding();
}

Not sure how that would cause a null pointer exception?  If the document is 
an instance of XMLObjectLink, then the document is, obviously, not null and 
that whole line should succeed.  Richard, David, Mark, any ideas here?

Roger, did you actually test your reduced testcase or are you assuming that 
it is equivalent to another piece of code that is bombing?  If you haven't 
tested the reduced testcase, can you post your actual code?  It might make 
a bit more sense.

Jake


> Cheers,
> Roger.
>
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