—

              
package CGI::Switch;
use Carp;
use strict;
use vars qw($VERSION @Pref);
$VERSION = '0.05';
@Pref = qw(CGI::Apache CGI); #default
sub import {
    my($self,@arg) = @_;
    @Pref = @arg if @arg;
}
sub new {
    shift;
    my($file,$pack);
    for $pack (@Pref) {
        ($file = $pack) =~ s|::|/|g;
        eval { require "$file.pm"; };
        if ($@) {
#XXX        warn $@;
            next;
        } else {
#XXX        warn "Going to try $pack\->new\n";
            my $obj;
            eval {$obj = $pack->new(@_)};
            if ($@) {
#XXX            warn $@;
            } else {
                return $obj;
            }
        }
    }
    Carp::croak "Couldn't load+construct any of @Pref\n";
}
# there's a trick in Lincoln's package that determines the calling
# package.  The reason is to have a filehandle with the same name as
# the filename.  To tell this trick that we are not the calling
# package we have to follow this dirty convention. It's a questionable
# trick imho, but for now I want to have something working
sub isaCGI { 1 }
1;
__END__
HideShow 34 lines of Pod
=head1 NAME
CGI::Switch - Try more than one constructors and return the first object available
=head1 SYNOPSIS
  
 use CGISwitch;
  -or-
 use CGI::Switch This, That, CGI::XA, Foo, Bar, CGI;
 my $q = new CGI::Switch;
=head1 DESCRIPTION
Per default the new() method tries to call new() in the three packages
Apache::CGI, CGI::XA, and CGI. It returns the first CGI object it
succeeds with.
The import method allows you to set up the default order of the
modules to be tested.
=head1 SEE ALSO
perl(1), Apache(3), CGI(3), CGI::XA(3)
=head1 AUTHOR
Andreas König E<lt>a.koenig@mind.deE<gt>
=cut