WebPAC/Input/ISIS.pm

package WebPAC::Input::ISIS;

use warnings;
use strict;

use WebPAC::Input;

=head1 NAME

WebPAC::Input::ISIS - support for CDS/ISIS database files

=head1 VERSION

Version 0.05

=cut

our $VERSION = '0.05';


=head1 SYNOPSIS

Open CDS/ISIS, WinISIS or IsisMarc database using C<Biblio::Isis> or
C<OpenIsis> module and read all records to memory.

 my $isis = new WebPAC::Input::ISIS();
 $isis->open( path => '/path/to/ISIS/ISIS' );

=head1 FUNCTIONS

=head2 init

Autoconfigure this module to use C<Biblio::Isis> or C<OpenIsis>.

=cut

sub init {
        my $self = shift;

        eval "use Biblio::Isis;";
        unless ($@) { 
                $self->{have_biblio_isis} = 1
        } else {
                eval "use OpenIsis;";
                $self->{have_openisis} = 1 unless ($@);
        }
}

=head2 open_db

Returns handle to database and size in records

  my ($db,$size) = $isis->open_db(
        path => '/path/to/LIBRI'
        filter => sub {
                my ($l,$field_nr) = @_;
                # do something with $l which is line of input file
                return $l;
        },
  }

Options:

=over 4

=item path

path to CDS/ISIS database

=back

=cut

sub open_db {
        my $self = shift;

        my $arg = {@_};

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

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

        my ($isis_db,$db_size);

        if ($self->{have_openisis}) {
                $log->debug("using OpenIsis perl bindings");
                $isis_db = OpenIsis::open($arg->{path});
                $db_size = OpenIsis::maxRowid( $isis_db ) || 1;
        } elsif ($self->{have_biblio_isis}) {
                $log->debug("using Biblio::Isis");
                use Biblio::Isis;
                $isis_db = new Biblio::Isis(
                        isisdb => $arg->{path},
                        include_deleted => 1,
                        hash_filter => $arg->{filter} ? sub { return $arg->{filter}->(@_); } : undef,
                ) or $log->logdie("can't find database $arg->{path}");

                $db_size = $isis_db->count;

        } else {
                $log->logdie("Can't find supported ISIS library for perl. I suggent that you install Bilbio::Isis from CPAN.");
        }

        return ($isis_db, $db_size);
}

=head2 fetch_rec

Return record with ID C<$mfn> from database

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

=cut

sub fetch_rec {
        my $self = shift;

        my ($isis_db, $mfn, $filter_coderef) = @_;

        my $rec;

        if ($self->{have_openisis}) {

                # read record using OpenIsis
                my $row = OpenIsis::read( $isis_db, $mfn );

                # convert record to hash
                foreach my $k (keys %{$row}) {
                        if ($k ne "mfn") {
                                foreach my $l (@{$row->{$k}}) {
                                        $l = $self->{iconv}->convert($l) if ($self->{iconv});
                                        # has subfields?
                                        my $val;
                                        if ($l =~ m/\^/) {
                                                foreach my $t (split(/\^/,$l)) {
                                                        next if (! $t);
                                                        $val->{substr($t,0,1)} = substr($t,1);
                                                }
                                        } else {
                                                $val = $l;
                                        }
                                        push @{$rec->{"$k"}}, $val;
                                }
                        } else {
                                push @{$rec->{'000'}}, $mfn;
                        }
                }

        } elsif ($self->{have_biblio_isis}) {
                $rec = $isis_db->to_hash({
                        mfn => $mfn,
                        include_subfields => 1,
                        hash_filter => $filter_coderef,
                });
        } else {
                $self->_get_logger()->logdie("hum? implementation missing?");
        }

        return $rec;
}

=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::ISIS
1	dpavlin	6	package WebPAC::Input::ISIS;
2
3			use warnings;
4			use strict;
5
6	dpavlin	285	use WebPAC::Input;
7
8	dpavlin	6	=head1 NAME
9
10	dpavlin	285	WebPAC::Input::ISIS - support for CDS/ISIS database files
11	dpavlin	6
12			=head1 VERSION
13
14	dpavlin	619	Version 0.05
15	dpavlin	6
16			=cut
17
18	dpavlin	619	our $VERSION = '0.05';
19	dpavlin	6
20
21			=head1 SYNOPSIS
22
23	dpavlin	285	Open CDS/ISIS, WinISIS or IsisMarc database using C<Biblio::Isis> or
24			C<OpenIsis> module and read all records to memory.
25	dpavlin	6
26			my $isis = new WebPAC::Input::ISIS();
27	dpavlin	285	$isis->open( path => '/path/to/ISIS/ISIS' );
28	dpavlin	6
29			=head1 FUNCTIONS
30
31	dpavlin	285	=head2 init
32	dpavlin	6
33	dpavlin	285	Autoconfigure this module to use C<Biblio::Isis> or C<OpenIsis>.
34	dpavlin	6
35	dpavlin	285	=cut
36	dpavlin	6
37	dpavlin	285	sub init {
38			my $self = shift;
39	dpavlin	6
40	dpavlin	298	eval "use Biblio::Isis;";
41	dpavlin	285	unless ($@) {
42			$self->{have_biblio_isis} = 1
43			} else {
44			eval "use OpenIsis;";
45			$self->{have_openisis} = 1 unless ($@);
46			}
47			}
48	dpavlin	6
49	dpavlin	285	=head2 open_db
50	dpavlin	6
51	dpavlin	497	Returns handle to database and size in records
52	dpavlin	6
53	dpavlin	597	my ($db,$size) = $isis->open_db(
54	dpavlin	285	path => '/path/to/LIBRI'
55	dpavlin	597	filter => sub {
56			my ($l,$field_nr) = @_;
57			# do something with $l which is line of input file
58			return $l;
59			},
60	dpavlin	285	}
61
62	dpavlin	597	Options:
63
64			=over 4
65
66			=item path
67
68			path to CDS/ISIS database
69
70			=back
71
72	dpavlin	6	=cut
73
74	dpavlin	285	sub open_db {
75	dpavlin	6	my $self = shift;
76	dpavlin	285
77	dpavlin	6	my $arg = {@_};
78
79			my $log = $self->_get_logger();
80
81	dpavlin	285	$log->info("opening ISIS database '$arg->{path}'");
82	dpavlin	6
83	dpavlin	21	my ($isis_db,$db_size);
84	dpavlin	6
85	dpavlin	285	if ($self->{have_openisis}) {
86	dpavlin	6	$log->debug("using OpenIsis perl bindings");
87	dpavlin	285	$isis_db = OpenIsis::open($arg->{path});
88	dpavlin	21	$db_size = OpenIsis::maxRowid( $isis_db ) \|\| 1;
89	dpavlin	285	} elsif ($self->{have_biblio_isis}) {
90	dpavlin	6	$log->debug("using Biblio::Isis");
91			use Biblio::Isis;
92			$isis_db = new Biblio::Isis(
93	dpavlin	285	isisdb => $arg->{path},
94	dpavlin	6	include_deleted => 1,
95	dpavlin	597	hash_filter => $arg->{filter} ? sub { return $arg->{filter}->(@_); } : undef,
96	dpavlin	285	) or $log->logdie("can't find database $arg->{path}");
97	dpavlin	265
98	dpavlin	21	$db_size = $isis_db->count;
99	dpavlin	6
100			} else {
101			$log->logdie("Can't find supported ISIS library for perl. I suggent that you install Bilbio::Isis from CPAN.");
102			}
103
104	dpavlin	285	return ($isis_db, $db_size);
105			}
106	dpavlin	6
107	dpavlin	285	=head2 fetch_rec
108	dpavlin	6
109	dpavlin	285	Return record with ID C<$mfn> from database
110	dpavlin	6
111	dpavlin	619	my $rec = $self->fetch_rec( $db, $mfn, $filter_coderef);
112	dpavlin	6
113	dpavlin	285	=cut
114	dpavlin	6
115	dpavlin	285	sub fetch_rec {
116			my $self = shift;
117	dpavlin	6
118	dpavlin	619	my ($isis_db, $mfn, $filter_coderef) = @_;
119	dpavlin	6
120	dpavlin	285	my $rec;
121	dpavlin	6
122	dpavlin	285	if ($self->{have_openisis}) {
123	dpavlin	6
124	dpavlin	285	# read record using OpenIsis
125			my $row = OpenIsis::read( $isis_db, $mfn );
126	dpavlin	6
127	dpavlin	285	# convert record to hash
128			foreach my $k (keys %{$row}) {
129			if ($k ne "mfn") {
130			foreach my $l (@{$row->{$k}}) {
131			$l = $self->{iconv}->convert($l) if ($self->{iconv});
132			# has subfields?
133			my $val;
134			if ($l =~ m/\^/) {
135			foreach my $t (split(/\^/,$l)) {
136			next if (! $t);
137			$val->{substr($t,0,1)} = substr($t,1);
138	dpavlin	6	}
139	dpavlin	285	} else {
140			$val = $l;
141	dpavlin	6	}
142	dpavlin	336	push @{$rec->{"$k"}}, $val;
143	dpavlin	6	}
144	dpavlin	285	} else {
145			push @{$rec->{'000'}}, $mfn;
146	dpavlin	6	}
147			}
148
149	dpavlin	285	} elsif ($self->{have_biblio_isis}) {
150	dpavlin	615	$rec = $isis_db->to_hash({
151			mfn => $mfn,
152	dpavlin	619	include_subfields => 1,
153			hash_filter => $filter_coderef,
154	dpavlin	615	});
155	dpavlin	6	} else {
156	dpavlin	285	$self->_get_logger()->logdie("hum? implementation missing?");
157	dpavlin	6	}
158
159	dpavlin	285	return $rec;
160	dpavlin	6	}
161
162			=head1 AUTHOR
163
164			Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
165
166			=head1 COPYRIGHT & LICENSE
167
168			Copyright 2005 Dobrica Pavlinusic, All Rights Reserved.
169
170			This program is free software; you can redistribute it and/or modify it
171			under the same terms as Perl itself.
172
173			=cut
174
175			1; # End of WebPAC::Input::ISIS