package DBIx::Class::Exception;
use strict;
-use vars qw[@ISA $DBIC_EXCEPTION_CLASS];
-use UNIVERSAL::require;
+use warnings;
-BEGIN {
- push( @ISA, $DBIC_EXCEPTION_CLASS || 'DBIx::Class::Exception::Base' );
-}
-
-package DBIx::Class::Exception::Base;
+use Carp::Clan qw/^DBIx::Class/;
+use Scalar::Util qw/blessed/;
-use strict;
-use Carp ();
+use overload
+ '""' => sub { shift->{msg} },
+ fallback => 1;
=head1 NAME
-DBIx::Class::Exception - DBIC Exception Class
-
-=head1 SYNOPSIS
-
- DBIx::Class::Exception->throw( qq/Fatal exception/ );
-
-See also L<DBIx::Class>.
+DBIx::Class::Exception - Exception objects for DBIx::Class
=head1 DESCRIPTION
-This is a generic Exception class for DBIx::Class. You can easily
-replace this with any mechanism implementing 'throw' by setting
-$DBix::Class::Exception::DBIC_EXCEPTION_CLASS
+Exception objects of this class are used internally by
+the default error handling of L<DBIx::Class::Schema/throw_exception>
+to prevent confusing and/or redundant re-application of L<Carp>'s
+stack trace information.
+
+These objects stringify to the contained error message, and use
+overload fallback to give natural boolean/numeric values.
=head1 METHODS
+=head2 throw
+
=over 4
-=item throw( $message )
+=item Arguments: $exception_scalar, $stacktrace
-=item throw( message => $message )
+=back
+
+This is meant for internal use by L<DBIx::Class>'s C<throw_exception>
+code, and shouldn't be used directly elsewhere.
-=item throw( error => $error )
+Expects a scalar exception message. The optional argument
+C<$stacktrace> tells it to use L<Carp/longmess> instead of
+L<Carp::Clan/croak>.
-Throws a fatal exception.
+ DBIx::Class::Exception->throw('Foo');
+ eval { ... }; DBIx::Class::Exception->throw($@) if $@;
=cut
sub throw {
- my $class = shift;
- my %params = @_ == 1 ? ( error => $_[0] ) : @_;
+ my ($class, $msg, $stacktrace) = @_;
- my $message = $params{message} || $params{error} || $! || '';
+ # Don't re-encapsulate exception objects of any kind
+ die $msg if blessed($msg);
- local $Carp::CarpLevel = 1;
+ # use Carp::Clan's croak if we're not stack tracing
+ if(!$stacktrace) {
+ local $@;
+ eval { croak $msg };
+ $msg = $@
+ }
+ else {
+ $msg = Carp::longmess($msg);
+ }
- Carp::croak($message);
+ my $self = { msg => $msg };
+ bless $self => $class;
+
+ die $self;
}
-=back
+=head2 rethrow
-=head1 AUTHOR
+This method provides some syntactic sugar in order to
+re-throw exceptions.
-Marcus Ramberg <mramberg@cpan.org>
+=cut
+
+sub rethrow {
+ die shift;
+}
-=head1 THANKS
+=head1 AUTHORS
-Thanks to the L<Catalyst> framework, where this module was borrowed
-from.
+Brandon L. Black <blblack@gmail.com>
-=head1 COPYRIGHT
+=head1 LICENSE
-This program is free software, you can redistribute it and/or modify
-it under the same terms as Perl itself.
+You may distribute this code under the same terms as Perl itself.
=cut