File Coverage

blib/lib/Class/DBI/BaseDSN.pm

Criterion	Covered	Total	%
statement	29	29	100.0
branch	7	10	70.0
condition			n/a
subroutine	4	4	100.0
pod	0	1	0.0
total	40	44	90.9

use strict;
package Class::DBI::BaseDSN;
use vars qw($VERSION);
$VERSION = '1.22';

sub set_db {
    my $package = shift;
    my ($name, $dsn) = @_;

    my $isa = do { no strict 'refs'; \@{"$package\::ISA"} };
    die "$package is not directly a ".__PACKAGE__
      unless grep { __PACKAGE__ eq $_ } @$isa;

    $dsn =~ m/^(?:dbi:)?([^:]+)/i
      or die "couldn't identify a backend from $dsn";

    my $backend = "Class::DBI::$1";

    unless (eval "require $backend; 1") {
        # Only quash "Can't locate" errors about the class we're pulling in.
	# It may be that we have Class::DBI::$dsn but not something that it
	# in turn needs (yes, dependencies should fix that, but they don't
	# always: see rt.cpan.org#3982)

        my $file = $backend;
        $file =~ s{::}{/}g;
        $@ =~ /^Can't locate \Q$file\E\.pm / or die $@;

        # if it simply wasn't there fall back to Class::DBI
        $backend = 'Class::DBI';
        require Class::DBI;
    }

    # okay, get out of the way, and make like we were never here
    for (@$isa) {
        $_ = $backend if $_ eq __PACKAGE__;
    }

    my $method = $package->can('set_db');
    unshift @_, $package;
    goto &$method;
}

1;

__END__