[jdom-interest] possible bug handling JTidy outputted Documen t

[philip.nelson at omniresources.com]

Hopefully I have not glossed over this too much but I do believe that a bug
with xhtml and DOMBuilder was uncovered.  I found out why but haven't taken
the time to fix it yet.

> -----Original Message-----
> From: Jon Garfunkel [mailto:yochanan at coopdata.net]
> Sent: Monday, October 01, 2001 2:14 PM
> To: jdom-interest at jdom.org
> Subject: [jdom-interest] possible bug handling JTidy 
> outputted Document
> 
> 
> I've joined this list to submit a note about this buggy 
> behavior. I have
> not done an exhaustive search to see whether this has been reported
> before, though I did find that interoperability with JTidy is 
> on the TODO
> list.
> 
> Here's some incompatible behavior between JDOM-beta7 and 
> JTidy 04aug2000r7-dev.
> 
> /***/
> FileInputStream input = new FileInputStream(HTMLfile);
> FileOutputStream output = new FileOutputStream(XHTMLfile);
> Tidy tidy = new Tidy();
> tidy.setXHTML(true);
> org.w3c.dom.Document myDOM = tidy.parseDOM(input,output);
> 
> // this fails -- see explanation
> org.jdom.Document myDoc = new org.jdom.Document(myDOM);
> 
> // at best we can use a SAXBuilder or DOMBuilder to build 
> from the file 
> SAXBuilder db = new DOMBuilder();
> org.jdom.Document doc = db.build(XHTMLfile);
> /***/
> 
> The exception raised in JDOM isn IllegalAddException when 
> adding the XHTML
> namespace. Apparently JTidy (1) sets this namespance [in 
> org.w3c.tidy.Lexer.setXHTMLDocType()], and (2) furthermore 
> gives it as an
> xmlns attribute to the html element.  When JDOM finds the 
> xmlns attribute,
> in attempts to add it [using 
> org.jdom.Element.addNamespaceDeclaration()],
> but finds that it collides with the existing namespace added at (1). 
> 
> My guess is that JTidy produces a legal DOM, but I don't know 
> DOM super
> well.
> 
> A brute workaround is simply to comment out the parts of
> addNamespaceDeclaration() that do the checking-- I do not have any
> documents which may fail here, because any XML documents I 
> plan to work
> with that don't come from JTidy will come from my XML editor.
> 
> Keep up the good work with JDOM. I am using it in many places for my
> software and look forward to introducing my work to you.
> 
> Jon
> 
> 
> 
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