File Coverage

blib/lib/MARC/Validator/Filter/Abstract.pm

Criterion	Covered	Total	%
statement	16	20	80.0
branch			n/a
condition			n/a
subroutine	5	7	71.4
pod	3	3	100.0
total	24	30	80.0

package MARC::Validator::Filter::Abstract;

use strict;
use warnings;

use Class::Utils qw(set_params);
use Error::Pure qw(err);

our $VERSION = 0.01;

# Constructor.
sub new {
	my ($class, @params) = @_;

	# Create object.
	my $self = bless {}, $class;

	# Process parameters.
	set_params($self, @params);

	return $self;
}

# Name of plugin.
sub name {
	my $self = shift;

	err __PACKAGE__.' is abstract class,';
}

# Process statistics.
sub process {
	my ($self, $marc_record) = @_;

	err __PACKAGE__.' is abstract class.';
}

1;

__END__

=pod

=encoding utf8

=head1 NAME

MARC::Validator::Filter::Abstract - Abstract class for MARC::Validator::Filter plugins.

=head1 SYNOPSIS

 my $obj = MARC::Validator::Filter::Abstract->new;
 my $name = $obj->name;
 my $filter_name = $obj->process($marc_record);

=head1 DESCRIPTION

This is abstract class for L<MARC::Validator::Filter> plugins, which are used in
L<App::MARC::Validator> tool.

=head1 METHODS

=head2 C<new>

 my $obj = MARC::Validator::Filter::Abstract->new(%params);

Constructor.

Returns instance of object.

=head2 C<name>

 my $name = $obj->name;

Get name of plugin.

Returns string.

=head2 C<process>

 my $filter_name = $obj->proces($marc_record);

Process L<MARC::Record> instance.

Returns string with filter name.

=head1 ERRORS

 new():
         From Class::Utils::set_params():
                 Unknown parameter '%s'.

         (only in this abstract class)
         MARC::Validator::Filter::Abstract is abstract class.

=head1 EXAMPLE

=for comment filename=example_plugin.pl

 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: ABA001

=head1 DEPENDENCIES

L<Class::Utils>,
L<Error::Pure>.

=head1 REPOSITORY

L<https://github.com/michal-josef-spacek/MARC-Validator-Filter>

=head1 AUTHOR

Michal Josef Špaček L<mailto:[e-mail]>

L<http://skim.cz>

=head1 LICENSE AND COPYRIGHT

© 2025-2026 Michal Josef Špaček

BSD 2-Clause License

=head1 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.

=head1 VERSION

0.01

=cut