InstantiationError for DOMException in xerces 1.4.4 under tomcat

[Brian White <bw...@steptwo.com.au>]

This is my first post to this list, so please pardon any faux pas.
I have done my best to find this elsewhere but I have had no luck.

I have a method on a factory class that I use to create a DOM Document
of type "DocumentImpl". As part of that method I set it to be
readonly on a deep level.

	DocumentImpl domdoc = (DocumentImpl)parser.getDocument();
        domdoc.setReadOnly( true, true );
        return domdoc;

I use this in a servlet. In the servlet I attempt to set an attribute
on the root element of the DOM document. This, of course, raises
an exception. The problem is that it is the wrong exception!

What I get is:

  java.lang.InstantiationError: org.w3c.dom.DOMException
      at org.apache.xerces.dom.ElementImpl.setAttribute(ElementImpl.java:441)
      at 
com.steptwo.intranet.servlets.XMLParserTestNew.doGet(XMLParserTestNew.java:207)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
      ...

Where lines 438 to 443 of ElementImpl.java are:

     public void setAttribute(String name, String value) {

         if (ownerDocument.errorChecking && isReadOnly()) {
             throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR,
                                    "DOM001 Modification not allowed");
         }

I can see no reason for this. DOMException is neither abstract
nor an interface, and I even recompiled DOMException.java file and
copied it into the tomcat classes area. ( Note that I am not a
  complete java novice but I am definitely a tomcat novice so
  there may well some foible of that that I am unaware of )

Please Help! I am very puzzled.

Regs

Brian White

-------------------------
Brian White
Step Two Designs Pty Ltd - SGML, XML & HTML Consultancy
Phone: +612-93197901
Web:   http://www.steptwo.com.au/
Email: bwhite@steptwo.com.au



---------------------------------------------------------------------
To unsubscribe, e-mail: xerces-j-user-unsubscribe@xml.apache.org
For additional commands, e-mail: xerces-j-user-help@xml.apache.org