WebPAC/Input/MARC.pm

package WebPAC::Input::MARC;

use warnings;
use strict;

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

=head1 NAME

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

=head1 VERSION

Version 0.09

=cut

our $VERSION = '0.09';


=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 $marc = $self->{_marc_db} || confess "no _marc_db?";
                my $row = $marc->to_hash($mfn);
                push @{$row->{'000'}}, $mfn;
                push @{$row->{'leader'}}, $marc->last_leader;
                return $row;
        }
}

=head2 dump_ascii

Return ASCII dump of record with ID C<$mfn> from database

  print $self->dump_ascii( $mfn );

=cut

sub dump_ascii {
        my $self = shift;

        my $mfn = shift;
        return $self->{_marc_db}->to_ascii($mfn);
}

=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	908	use Carp qw/confess/;
9	dpavlin	289
10			=head1 NAME
11
12			WebPAC::Input::MARC - support for MARC database files
13
14			=head1 VERSION
15
16	dpavlin	908	Version 0.09
17	dpavlin	289
18			=cut
19
20	dpavlin	908	our $VERSION = '0.09';
21	dpavlin	289
22
23			=head1 SYNOPSIS
24
25			Open USMARC, Unimarc or any other file format that has same internal
26			structure using C<MARC::Fast>.
27
28	dpavlin	726	my $marc = new WebPAC::Input::MARC(
29			path => '/path/to/marc.iso'
30			);
31	dpavlin	289
32			=head1 FUNCTIONS
33
34	dpavlin	726	=head2 new
35	dpavlin	289
36	dpavlin	726	Returns new low-level input API object
37	dpavlin	289
38	dpavlin	726	my $marc = new WebPAC::Input::MARC(
39	dpavlin	416	path => '/path/to/marc.iso',
40			filter => \&code_ref,
41	dpavlin	289	}
42
43			=cut
44
45	dpavlin	726	sub new {
46			my $class = shift;
47			my $self = {@_};
48			bless($self, $class);
49	dpavlin	289
50			my $arg = {@_};
51
52			my $log = $self->_get_logger();
53
54			$log->info("opening MARC database '$arg->{path}'");
55
56	dpavlin	416	my $db = new MARC::Fast(
57			marcdb => $arg->{path},
58			hash_filter => $arg->{filter},
59			);
60	dpavlin	290	my $db_size = $db->count - 1; # FIXME
61	dpavlin	289
62	dpavlin	337	$self->{_marc_size} = $db_size;
63	dpavlin	652	$self->{_marc_db} = $db;
64	dpavlin	290
65	dpavlin	726	$self ? return $self : return undef;
66	dpavlin	289	}
67
68			=head2 fetch_rec
69
70			Return record with ID C<$mfn> from database
71
72	dpavlin	652	my $rec = $self->fetch_rec( $mfn );
73	dpavlin	289
74			=cut
75
76			sub fetch_rec {
77			my $self = shift;
78
79	dpavlin	652	my $mfn = shift;
80	dpavlin	289
81	dpavlin	337	if ($mfn > $self->{_marc_size}) {
82			$self->_get_logger()->warn("seek beyond database size $self->{_marc_size} to $mfn");
83	dpavlin	290	} else {
84	dpavlin	908	my $marc = $self->{_marc_db} \|\| confess "no _marc_db?";
85			my $row = $marc->to_hash($mfn);
86	dpavlin	291	push @{$row->{'000'}}, $mfn;
87	dpavlin	908	push @{$row->{'leader'}}, $marc->last_leader;
88	dpavlin	290	return $row;
89			}
90	dpavlin	289	}
91
92	dpavlin	774	=head2 dump_ascii
93	dpavlin	772
94	dpavlin	774	Return ASCII dump of record with ID C<$mfn> from database
95	dpavlin	772
96	dpavlin	774	print $self->dump_ascii( $mfn );
97	dpavlin	772
98			=cut
99
100	dpavlin	774	sub dump_ascii {
101	dpavlin	772	my $self = shift;
102
103			my $mfn = shift;
104			return $self->{_marc_db}->to_ascii($mfn);
105			}
106
107	dpavlin	726	=head2 size
108	dpavlin	337
109	dpavlin	726	Return number of records in database
110	dpavlin	337
111	dpavlin	726	my $size = $isis->size;
112	dpavlin	337
113	dpavlin	726	=cut
114	dpavlin	337
115	dpavlin	726	sub size {
116			my $self = shift;
117			return $self->{_marc_size};
118			}
119	dpavlin	337
120
121	dpavlin	289	=head1 AUTHOR
122
123			Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
124
125			=head1 COPYRIGHT & LICENSE
126
127			Copyright 2005 Dobrica Pavlinusic, All Rights Reserved.
128
129			This program is free software; you can redistribute it and/or modify it
130			under the same terms as Perl itself.
131
132			=cut
133
134			1; # End of WebPAC::Input::MARC