WebPAC/Input/MARC.pm

package WebPAC::Input::MARC;

use warnings;
use strict;

use MARC::Fast 0.03;
use base qw/WebPAC::Common/;

=head1 NAME

WebPAC::Input::MARC - support for MARC database files

=head1 VERSION

Version 0.06

=cut

our $VERSION = '0.06';


=head1 SYNOPSIS

Open USMARC, Unimarc or any other file format that has same internal
structure using C<MARC::Fast>.

 my $marc = new WebPAC::Input::MARC(
        path => '/path/to/marc.iso'
 );

=head1 FUNCTIONS

=head2 new

Returns new low-level input API object

  my $marc = new WebPAC::Input::MARC(
        path => '/path/to/marc.iso',
        filter => \&code_ref,
  }

=cut

sub new {
        my $class = shift;
        my $self = {@_};
        bless($self, $class);

        my $arg = {@_};

        my $log = $self->_get_logger();

        $log->info("opening MARC database '$arg->{path}'");

        my $db = new MARC::Fast(
                marcdb => $arg->{path},
                hash_filter => $arg->{filter},
        );
        my $db_size = $db->count - 1;   # FIXME

        $self->{_marc_size} = $db_size;
        $self->{_marc_db} = $db;

        $self ? return $self : return undef;
}

=head2 fetch_rec

Return record with ID C<$mfn> from database

  my $rec = $self->fetch_rec( $mfn );

}

=cut

sub fetch_rec {
        my $self = shift;

        my $mfn = shift;

        if ($mfn > $self->{_marc_size}) {
                $self->_get_logger()->warn("seek beyond database size $self->{_marc_size} to $mfn");
        } else {
                my $row = $self->{_marc_db}->to_hash($mfn);
                push @{$row->{'000'}}, $mfn;
                return $row;
        }
}

=head2 size

Return number of records in database

  my $size = $isis->size;

=cut

sub size {
        my $self = shift;
        return $self->{_marc_size};
}


=head1 AUTHOR

Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>

=head1 COPYRIGHT & LICENSE

Copyright 2005 Dobrica Pavlinusic, All Rights Reserved.

This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.

=cut

1; # End of WebPAC::Input::MARC
1	dpavlin	289	package WebPAC::Input::MARC;
2
3			use warnings;
4			use strict;
5
6	dpavlin	416	use MARC::Fast 0.03;
7	dpavlin	726	use base qw/WebPAC::Common/;
8	dpavlin	289
9			=head1 NAME
10
11			WebPAC::Input::MARC - support for MARC database files
12
13			=head1 VERSION
14
15	dpavlin	726	Version 0.06
16	dpavlin	289
17			=cut
18
19	dpavlin	726	our $VERSION = '0.06';
20	dpavlin	289
21
22			=head1 SYNOPSIS
23
24			Open USMARC, Unimarc or any other file format that has same internal
25			structure using C<MARC::Fast>.
26
27	dpavlin	726	my $marc = new WebPAC::Input::MARC(
28			path => '/path/to/marc.iso'
29			);
30	dpavlin	289
31			=head1 FUNCTIONS
32
33	dpavlin	726	=head2 new
34	dpavlin	289
35	dpavlin	726	Returns new low-level input API object
36	dpavlin	289
37	dpavlin	726	my $marc = new WebPAC::Input::MARC(
38	dpavlin	416	path => '/path/to/marc.iso',
39			filter => \&code_ref,
40	dpavlin	289	}
41
42			=cut
43
44	dpavlin	726	sub new {
45			my $class = shift;
46			my $self = {@_};
47			bless($self, $class);
48	dpavlin	289
49			my $arg = {@_};
50
51			my $log = $self->_get_logger();
52
53			$log->info("opening MARC database '$arg->{path}'");
54
55	dpavlin	416	my $db = new MARC::Fast(
56			marcdb => $arg->{path},
57			hash_filter => $arg->{filter},
58			);
59	dpavlin	290	my $db_size = $db->count - 1; # FIXME
60	dpavlin	289
61	dpavlin	337	$self->{_marc_size} = $db_size;
62	dpavlin	652	$self->{_marc_db} = $db;
63	dpavlin	290
64	dpavlin	726	$self ? return $self : return undef;
65	dpavlin	289	}
66
67			=head2 fetch_rec
68
69			Return record with ID C<$mfn> from database
70
71	dpavlin	652	my $rec = $self->fetch_rec( $mfn );
72	dpavlin	289
73			}
74
75			=cut
76
77			sub fetch_rec {
78			my $self = shift;
79
80	dpavlin	652	my $mfn = shift;
81	dpavlin	289
82	dpavlin	337	if ($mfn > $self->{_marc_size}) {
83			$self->_get_logger()->warn("seek beyond database size $self->{_marc_size} to $mfn");
84	dpavlin	290	} else {
85	dpavlin	652	my $row = $self->{_marc_db}->to_hash($mfn);
86	dpavlin	291	push @{$row->{'000'}}, $mfn;
87	dpavlin	290	return $row;
88			}
89	dpavlin	289	}
90
91	dpavlin	726	=head2 size
92	dpavlin	337
93	dpavlin	726	Return number of records in database
94	dpavlin	337
95	dpavlin	726	my $size = $isis->size;
96	dpavlin	337
97	dpavlin	726	=cut
98	dpavlin	337
99	dpavlin	726	sub size {
100			my $self = shift;
101			return $self->{_marc_size};
102			}
103	dpavlin	337
104
105	dpavlin	289	=head1 AUTHOR
106
107			Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
108
109			=head1 COPYRIGHT & LICENSE
110
111			Copyright 2005 Dobrica Pavlinusic, All Rights Reserved.
112
113			This program is free software; you can redistribute it and/or modify it
114			under the same terms as Perl itself.
115
116			=cut
117
118			1; # End of WebPAC::Input::MARC