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#-*- perl -*-
#
# Copyright (C) 2001,2002,2003,2004 Ken'ichi Fukamachi
# All rights reserved. This program is free software; you can
# redistribute it and/or modify it under the same terms as Perl itself.
#
# $FML: ErrorStatus.pm,v 1.8 2004/01/24 09:03:56 fukachan Exp $
#
package IO::Adapter::ErrorStatus;
use strict;
use vars qw(@ISA @EXPORT @EXPORT_OK);
use Carp;
require Exporter;
@ISA = qw(Exporter);
@EXPORT_OK = qw(errstr error error_set error_clear);
=head1 NAME
IO::Adapter::ErrorStatus - error handling component.
=head1 SYNOPSIS
Use this module in your C<Something> class module like this:
package Something;
use IO::Adapter::ErrorStatus qw(errstr error error_set error_clear);
sub xxx
{
if something errors ...
$self->error_set( why this error occurs ... );
}
You use C<Something> module like this.
use Something;
$obj = new Something;
$obj->xxx();
unless ($obj->error) { $obj->do_somting( ...); };
=head1 DESCRIPTION
simple utility functions to manipulate error messages.
=head1 METHODS
=head2 error_set($message)
save $message as an error message.
=head2 error()
return $message which is saved by C<error_set($msg)>.
=cut
# Descriptions: set the error message.
# Arguments: OBJ($self) STR($mesg)
# Side Effects: update OBJ
# Return Value: STR
sub error_set
{
my ($self, $mesg) = @_;
$self->{'_error_reason'} = $mesg || '';
}
# Descriptions: get the error message.
# Arguments: OBJ($self)
# Side Effects: none
# Return Value: STR
sub error
{
my ($self) = @_;
return( $self->{'_error_reason'} || '' );
}
# Descriptions: get the error message.
# Arguments: OBJ($self)
# Side Effects: none
# Return Value: STR
sub errstr
{
my ($self) = @_;
return( $self->{'_error_reason'} || '' );
}
# Descriptions: clear the error message.
# Arguments: OBJ($self)
# Side Effects: none
# Return Value: STR
sub error_clear
{
my ($self) = @_;
my $msg = $self->{'_error_reason'};
undef $self->{'_error_reason'} if defined $self->{'_error_reason'};
undef $self->{'_error_action'} if defined $self->{'_error_action'};
return $msg;
}
=head1 CODING STYLE
See C<http://www.fml.org/software/FNF/> on fml coding style guide.
=head1 AUTHOR
Ken'ichi Fukamachi
=head1 COPYRIGHT
Copyright (C) 2001,2002,2003,2004 Ken'ichi Fukamachi
All rights reserved. This program is free software; you can
redistribute it and/or modify it under the same terms as Perl itself.
=head1 HISTORY
IO::Adapter::ErrorStatus first appeared in fml8 mailing list driver package.
See C<http://www.fml.org/> for more details.
=cut
1;
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