DBM_Filter::encode - filter for DBM_Filter

perl documentation Contained in the perl distribution.

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NAME

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DBM_Filter::encode - filter for DBM_Filter

SYNOPSIS

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    use SDBM_File; # or DB_File, or GDBM_File, or NDBM_File, or ODBM_File
    use DBM_Filter ;

    $db = tie %hash, ...
    $db->Filter_Push('encode' => 'iso-8859-16');

DESCRIPTION

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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:

1

The Encode module is not available.

2

The encoding requested is not supported by the Encode module.

SEE ALSO

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DBM_Filter, perldbmfilter, Encode

AUTHOR

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Paul Marquess pmqs@cpan.org

perl documentation Contained in the perl distribution. 
package DBM_Filter::encode ;

use strict;
use warnings;
use Carp;

our $VERSION = '0.02';

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__