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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__
=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
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