OpenSAML user discussion

[Mark Wilcox <>]

Scott -- there really isn't any compile time options in Java do what you
want -- i.e. there's no preprocessor. What you probably do is abstract out
the functionality and use a factory to get the implementation and then could
test if the method existed before calling it (Java's runtime class
manipulation can be a wonderful thing when used correctly :).

However, I can't think of why Shannon would be restricted to using whatever
XML parser the app server used.

Mark

> -----Original Message-----
> From: 
> 
> [mailto:]On
>  Behalf Of Scott
> Cantor
> Sent: Tuesday, March 04, 2003 3:37 PM
> To: 'Shannon Kendrick'; 
> 
> Subject: RE: Can OpenSAML be used with JAXP compliant XML parsers?
>
>
> > I was wondering if OpenSAML really requires features specific
> > to Apache Xerces, or could another JAXP compliant parser be
> > used? I ran into a little deployment problem with OpenSAML on
> > my app server because it uses a different XML parser. While I
> > was investigating the problem, I realized that OpenSAML
> > instantiates some Xerces classes directly rather than using
> > the factory methods in JAXP.
>
> IIRC, I had at one point stuck to mostly JAXP and DOM calls, but
> ran into a problem with setting one of the parser features. I think
> it had to do with an inablity to change the schemaLocations
> property *after* having built a parser, and I wanted to pool them, but
> still allow schemas to be added after initialization.
>
> The parse and newDocument functions are probably sufficiently
> encapsulated that a JAXP version could be built pretty easily now, but
> the pooling would have to be bypassed.
>
> I confess, I know how to support building such variant
> implementations in C++ using compile time declarations, but I
> don't know much
> about doing it in Java.
>
> Most app servers let you override the class loader for your app
> (ok, Tomcat does), and given the way Java works, that seems pretty
> essential to me though.
>
> -- Scott
>
>

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