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package DBIx::Class::Exception;
use strict;
use warnings;
# load Carp early to prevent tickling of the ::Internal stash being
# interpreted as "Carp is already loaded" by some braindead loader
use Carp ();
$Carp::Internal{ (__PACKAGE__) }++;
use DBIx::Class::Carp ();
use overload
'""' => sub { shift->{msg} },
fallback => 1;
=head1 NAME
DBIx::Class::Exception - Exception objects for DBIx::Class
=head1 DESCRIPTION
Exception objects of this class are used internally by
the default error handling of L<DBIx::Class::Schema/throw_exception>
and derivatives.
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 Arguments: $exception_scalar, $stacktrace
=back
This is meant for internal use by L<DBIx::Class>'s C<throw_exception>
code, and shouldn't be used directly elsewhere.
Expects a scalar exception message. The optional boolean C<$stacktrace>
causes it to output a full trace similar to L<confess|Carp/DESCRIPTION>.
DBIx::Class::Exception->throw('Foo');
try { ... } catch { DBIx::Class::Exception->throw(shift) }
=cut
sub throw {
my ($class, $msg, $stacktrace) = @_;
# Don't re-encapsulate exception objects of any kind
die $msg if ref($msg);
# all exceptions include a caller
$msg =~ s/\n$//;
if(!$stacktrace) {
# skip all frames that match the original caller, or any of
# the dbic-wide classdata patterns
my ($ln, $calling) = DBIx::Class::Carp::__find_caller(
'^' . caller() . '$',
'DBIx::Class',
);
$msg = "${calling}${msg} ${ln}\n";
}
else {
$msg = Carp::longmess($msg);
}
my $self = { msg => $msg };
bless $self => $class;
die $self;
}
=head2 rethrow
This method provides some syntactic sugar in order to
re-throw exceptions.
=cut
sub rethrow {
die shift;
}
=head1 FURTHER QUESTIONS?
Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>.
=head1 COPYRIGHT AND LICENSE
This module is free software L<copyright|DBIx::Class/COPYRIGHT AND LICENSE>
by the L<DBIx::Class (DBIC) authors|DBIx::Class/AUTHORS>. You can
redistribute it and/or modify it under the same terms as the
L<DBIx::Class library|DBIx::Class/COPYRIGHT AND LICENSE>.
=cut
1;
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