XOM API for Processing XML with Java

[Wolfgang Hoschek <whoschek AT lbl.gov>]

On Oct 28, 2004, at 10:01 AM, Elliotte Harold wrote:

> Wolfgang Hoschek wrote:
>
> > Builder.setupParser() and knownGoodParser() do some checks for known 
> > parsers ala
> > if (parser.getClass().getName()) { ... special configure ...}
> > If the parser is a SAX XMLFilter then this would not really help, so 
> > the suggestions is to have the code in these methods check if the 
> > parser is an instanceof XMLFilter and walk the parser tree via 
> > getParent() until a parser is found that is not an instanceof 
> > XMLFilter.
>
> The problem is that XML filters can and routinely do violate 
> well-formedness constraints, even when the underlying real parser does 
> not. I special case one common filter that I trust not to violate 
> XML's well-formedness rules (Norm Walsh's catalog filter) but I'm not 
> willing to extend this courtesy to all filters everywhere.

Right, but for example it might be good to do the following even if 
getParserName(...) yields Crimson

            if (parser.getClass().getName().equals(  // Crimson 
workaround
              "org.apache.crimson.parser.XMLReaderImpl")) {
                parser.setErrorHandler(
                  new NamespaceWellformednessRequired()
                );


Above snippet is from Builder.setupParser()

Wolfgang.