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XMLApplication.pm  view on Meta::CPAN

The class module extends the CGI class. While all functionality of the
original CGI package is still available, it should be not such a big
problem, to port existing scripts to CGI::XMLApplication, although
most functions used here are the access function for client data
such as I<param()>.

CGI::XMLApplication, intended to be an application class should make
writing of XML enabled CGI scripts more easy. Especially because of
the use of object orientated concepts, this class enables much more
transparent implemententations with complex functionality compared to
what is possible with standard CGI-scripts.

The main difference with common perl CGI implementation is the fact,
that the client-output is not done from perl functions, but generated
by an internally build XML DOM that gets processed with an XSLT
stylesheet. This fact helps to remove a lot of the HTML related
functions from the core code, so a script may be much easier to read,
since only application relevant code is visible, while layout related
information is left out (commonly in an XSLT file).

XMLApplication.pm  view on Meta::CPAN

This method is called by the class constructor - namely
CGI::XMLApplication's B<new()> function . Each application should
register the events it likes to handle with this function. It should
return an array of eventnames such as eg. 'remove' or 'store'. This
list is used to find which event a user caused on the client side.

=item method run

Being the main routine this should be the only method called by the
script apart from the constructor. All events are handled inside the
method B<run()>.  Since this method is extremly simple and transparent
to any kind of display type, there should be no need to override this
function. One can pass a context hash or context object, to pass external
or prefetched information to the application. This context will be
available and accessible in all events and most extra functions.

This function does all event and serialization related work. As well
there is some validation done as well, so catched events, that are not
implemented, will not cause any harm.

=back