Bug 30096

I.e. if your DTD includes:

<!--- This does something. -->
<!ELEMENT foo EMPTY>
<!ATTLIST foo x PCDATA #REQUIRED>

Then the generated handler interface class should
look like:

/**
 * An empty element event handling method.
 * The element <code>&lt;foo&gt;</code> is
documented as follows:
 * <div>
 * This does something.
 * </div>
 * @param meta attributes
 * @throws SAXException if the content is invalid
 */
void handle_foo(Attributes meta) throws SAXException;

That would make the interface easier to implement.

BTW other changes shown here to improve generated
code: include @throws SAXException; correct @param
name (meta, not data!); 'public' keyword
gratuitous in an interface; 'final' keyword
meaningless on an interface param.

Also the interface should have no 'meta' param in
case there are no declared attributes for the
element. There should also be an option to pass
one param per declared attribute (null for
missing), I think, though some users may not want
to do this for performance reasons.

And 'java.lang.String' for 'data' params of PCDATA
elements should just read 'String'.