[jdom-interest] DOMBuilder validation

[Brett McLaughlin]

Elliotte Rusty Harold wrote:
> 
> At 10:30 PM -0700 6/13/00, Jason Hunter wrote:
> 
> >The code looks like it should be validating, and someone else posted
> >that they saw validation occurring.  Are you sure you're not seeing
> >validation?  Are you using the default-provided Xerces?
> >
> 
> I've tried this with multiple builds of Xerces. All give me the same
> result. Maybe the flaw is in my understanding of how validity errors
> are reported. With SAXBuilder a validity error throws an exception at
> build time. Does this not happen with DOMBuilder? If so, how is one
> supposed to note the validity errors?

For the record, Elliotte, I think there may be validation problems in
DOMBuilder - that class has not gotten as much attention as SAXBuilder
has, for obvious reasons. I'll take a look today and get back to you...

-Brett

> 
> Here's the code I'm working with. The SAXBuilder equivalent works just fine.
> 
> import org.jdom.*;
> import org.jdom.input.DOMBuilder;
> import org.apache.xerces.parsers.*;
> 
> public class DOMValidator {
> 
>    public static void main(String[] args) {
> 
>      if (args.length == 0) {
>        System.out.println("Usage: java DOMValidator URL1 URL2...");
>      }
> 
>      DOMBuilder builder = new DOMBuilder(true);
>                               /*         ^^^^       */
>                               /* Turn on validation */
>      // start parsing...
>      DOMParser parser = new DOMParser();  // Xerces specific class
>      for (int i = 0; i < args.length; i++) {
> 
>        try {
>          // Read the entire document into memory
>          parser.parse(args[i]);
> 
>          org.w3c.dom.Document domDoc  = parser.getDocument();
>          org.jdom.Document    jdomDoc = builder.build(domDoc);
> 
>          // If there are no validity errors,
>          // then no exception is thrown
>          System.out.println(args[i] + " is valid.");
>        }
>        catch (Exception e) { // indicates a well-formedness or validity error
>          System.out.println(args[i] + " is not valid.");
>          System.out.println(e.getMessage());
>        }
> 
>      }
> 
>    }
> 
> }
> 
> +-----------------------+------------------------+-------------------+
> | Elliotte Rusty Harold | elharo at metalab.unc.edu | Writer/Programmer |
> +-----------------------+------------------------+-------------------+
> |                  The XML Bible (IDG Books, 1999)                   |
> |              http://metalab.unc.edu/xml/books/bible/               |
> |   http://www.amazon.com/exec/obidos/ISBN=0764532367/cafeaulaitA/   |
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