package DBM_Filter::encode ;
use strict;
use warnings;
use Carp;
our $VERSION = '0.03';
BEGIN
{
eval { require Encode; };
croak "Encode module not found.\n"
if $@;
}
sub Filter
{
my $encoding_name = shift || "utf8";
my $encoding = Encode::find_encoding($encoding_name) ;
croak "Encoding '$encoding_name' is not available"
unless $encoding;
return {
Store => sub {
$_ = $encoding->encode($_)
if defined $_ ;
},
Fetch => sub {
$_ = $encoding->decode($_)
if defined $_ ;
}
} ;
}
1;
__END__
=head1 NAME
DBM_Filter::encode - filter for DBM_Filter
=head1 SYNOPSIS
use SDBM_File; # or DB_File, GDBM_File, NDBM_File, ODBM_File
use DBM_Filter ;
$db = tie %hash, ...
$db->Filter_Push('encode' => 'iso-8859-16');
=head1 DESCRIPTION
This DBM filter allows you to choose the character encoding will be
store in the DBM file. The usage is
$db->Filter_Push('encode' => ENCODING);
where "ENCODING" must be a valid encoding name that the Encode module
recognises.
A fatal error will be thrown if:
=over 5
=item 1
The Encode module is not available.
=item 2
The encoding requested is not supported by the Encode module.
=back
=head1 SEE ALSO
L<DBM_Filter>, L<perldbmfilter>, L<Encode>
=head1 AUTHOR
Paul Marquess pmqs@cpan.org