NAME
MARC::Validator::Filter::Abstract - Abstract class for MARC::Validator::Filter plugins.
SYNOPSIS
my $obj = MARC::Validator::Filter::Abstract->new;
my $name = $obj->name;
my $filter_name = $obj->process($marc_record);DESCRIPTION
This is abstract class for MARC::Validator::Filter plugins, which are used in App::MARC::Validator tool.
METHODS
new
my $obj = MARC::Validator::Filter::Abstract->new(%params);Constructor.
Returns instance of object.
name
my $name = $obj->name;Get name of plugin.
Returns string.
process
my $filter_name = $obj->proces($marc_record);Process MARC::Record instance.
Returns string with filter name.
ERRORS
new():
From Class::Utils::set_params():
Unknown parameter '%s'.
(only in this abstract class)
MARC::Validator::Filter::Abstract is abstract class.EXAMPLE
use strict;
use warnings;
package MARC::Validator::Filter::Plugin::Foo;
use base qw(MARC::Validator::Filter::Abstract);
our $VERSION = 1.01;
sub name {
my $self = shift;
return 'foo';
}
sub process {
my ($self, $marc_record) = @_;
my $field_040 = $marc_record->field('040');
my $field_040_a = $field_040->subfield('a');
return $field_040_a;
}
package main;
use Data::Printer;
use File::Temp qw(tempfile);
use IO::Barf qw(barf);
use MARC::File::XML (BinaryEncoding => 'utf8', RecordFormat => 'MARC21');
use MIME::Base64;
# Content.
my $marc_xml_example = <<'END';
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END
my ($temp_file, $temp_file_fh) = tempfile();
barf($temp_file_fh, decode_base64($marc_xml_example));
my $marc_file = MARC::File::XML->in($temp_file);
my $marc_record = $marc_file->next;
my $obj = MARC::Validator::Filter::Plugin::Foo->new;
my $name = $obj->name;
print "Name: $name\n";
my $filter_string = $obj->process($marc_record);
print "Filter string: ";
if (defined $filter_string) {
print $filter_string."\n";
} else {
print "-\n";
}
unlink $temp_file;
# Output:
# Name: foo
# Filter string: ABA001DEPENDENCIES
REPOSITORY
https://github.com/michal-josef-spacek/MARC-Validator-Filter
AUTHOR
Michal Josef Špaček mailto:skim@cpan.org
LICENSE AND COPYRIGHT
© 2025-2026 Michal Josef Špaček
BSD 2-Clause License
ACKNOWLEDGEMENTS
Development of this software has been made possible by institutional support for the long-term strategic development of the National Library of the Czech Republic as a research organization provided by the Ministry of Culture of the Czech Republic (DKRVO 2024–2028), Area 11: Linked Open Data.
VERSION
0.01