OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help



   Re: SAX: Parser Factory class

[ Lists Home | Date Index | Thread Index ]
  • From: "John Wilson" <tug@wilson.co.uk>
  • To: "Andrew n marshall" <amarshal@usc.edu>, "Xml-Dev List" <xml-dev@ic.ac.uk>
  • Date: Mon, 20 Apr 1998 11:20:05 +0100

The Java Crypto Extensions allow you to request a generic implementation of an algorithm or a specific implementation. This is bases on having a set of "Providers" and a set of engine classes (essentially class factories). When calling getInstance() on the appropriate engine class you can specify either that you want any implementation of the algorithm or that you want a specific implementation from a specific provider. Providers are installed by editing a configuration file or by adding them dynamically using Security.addProvider(). Providers are ordered so a request for a generic implementation will be serviced by the first provider found which offers that algorithm.
It might be possible to do such a thing for SAX parsers, but you would really have to have an agreed set of functions that parsers did or did not implement. If you would then be able to say:
    "give me an instance of a parser that at minimum does this, this and this"
    "give me an instance of the IBM parser"
you should also be able to say
    "give me an instance of the IBM parser that does this, that and the other"
This raises two questions:
1/ Could everybody agree on the set of functions?
2/ Is there a real need for a general solution to the problem of working with several parsers?
-----Original Message-----
From: Andrew n marshall <amarshal@usc.edu>
To: Xml-Dev List <xml-dev@ic.ac.uk>
Date: 16 April 1998 16:15
Subject: SAX: Parser Factory class

While it is great that there are so many SAX parsers available, the thing that bothers me is that my application has to know what Parser to load in just to use SAX.  And  this means that even is a SAX parser is available on the users machine, they may still have to download the one I use to to run my application.
If there is already a solution for this, then please let me know.
FN:John Wilson
ORG:The Wilson Partnership
TEL;WORK;VOICE:+44 1296 641072
TEL;CELL;VOICE:+44 976 611010
TEL;WORK;FAX:+44 1296 641874
ADR;WORK;ENCODING=QUOTED-PRINTABLE:;;5 Market Hill=0D=0AWhitchurch;Aylesbury;Buckinghamshire;HP22 4JB;UK
LABEL;WORK;ENCODING=QUOTED-PRINTABLE:5 Market Hill=0D=0AWhitchurch=0D=0AAylesbury, Buckinghamshire HP22 4JB=0D=


News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 2001 XML.org. This site is hosted by OASIS