--- /dev/null
+package WebPAC::Input::ISIS;
+
+use warnings;
+use strict;
+
+use WebPAC::Common;
+use base qw/WebPAC::Input WebPAC::Common/;
+
+=head1 NAME
+
+WebPAC::Input::ISIS - support for CDS/ISIS source files
+
+=head1 VERSION
+
+Version 0.01
+
+=cut
+
+our $VERSION = '0.01';
+
+
+# auto-configure
+
+my ($have_biblio_isis, $have_openisis) = (0,0);
+
+eval "use Biblio::Isis 0.13;";
+unless ($@) {
+ $have_biblio_isis = 1
+} else {
+ eval "use OpenIsis;";
+ $have_openisis = 1 unless ($@);
+}
+
+=head1 SYNOPSIS
+
+Open CDS/ISIS, WinISIS or IsisMarc database using Biblio::Isis or OpenIsis
+module and read all records to memory.
+
+ my $isis = new WebPAC::Input::ISIS();
+ $isis->open( filename => '/path/to/ISIS/ISIS' );
+
+=head1 FUNCTIONS
+
+=head2 open
+
+This function will read whole database in memory and produce lookups.
+
+ $isis->open(
+ filename => '/data/ISIS/ISIS',
+ code_page => '852',
+ limit_mfn => 500,
+ start_mfn => 6000,
+ lookup => $lookup_obj,
+ );
+
+By default, ISIS code page is assumed to be C<852>.
+
+If optional parametar C<start_mfn> is set, this will be first MFN to read
+from database (so you can skip beginning of your database if you need to).
+
+If optional parametar C<limit_mfn> is set, it will read just 500 records
+from database in example above.
+
+Returns number of last record read into memory (size of database, really).
+
+=cut
+
+sub open {
+ my $self = shift;
+ my $arg = {@_};
+
+ my $log = $self->_get_logger();
+
+ $log->logcroak("need filename") if (! $arg->{'filename'});
+ my $code_page = $arg->{'code_page'} || '852';
+
+ $log->logdie("can't find database ",$arg->{'filename'}) unless (glob($arg->{'filename'}.'.*'));
+
+ # store data in object
+ $self->{'isis_filename'} = $arg->{'filename'};
+ $self->{'isis_code_page'} = $code_page;
+
+ #$self->{'isis_code_page'} = $code_page;
+
+ # create Text::Iconv object
+ my $cp = Text::Iconv->new($code_page,$self->{'code_page'});
+
+ $log->info("reading ISIS database '",$arg->{'filename'},"'");
+ $log->debug("isis code page: $code_page");
+
+ my ($isis_db,$maxmfn);
+
+ if ($have_openisis) {
+ $log->debug("using OpenIsis perl bindings");
+ $isis_db = OpenIsis::open($arg->{'filename'});
+ $maxmfn = OpenIsis::maxRowid( $isis_db ) || 1;
+ } elsif ($have_biblio_isis) {
+ $log->debug("using Biblio::Isis");
+ use Biblio::Isis;
+ $isis_db = new Biblio::Isis(
+ isisdb => $arg->{'filename'},
+ include_deleted => 1,
+ hash_filter => sub {
+ my $l = shift || return;
+ $l = $cp->convert($l);
+ return $l;
+ },
+ );
+ $maxmfn = $isis_db->count;
+
+ unless ($maxmfn) {
+ $log->logwarn("no records in database ", $arg->{'filename'}, ", skipping...");
+ return;
+ }
+
+ } else {
+ $log->logdie("Can't find supported ISIS library for perl. I suggent that you install Bilbio::Isis from CPAN.");
+ }
+
+
+ my $startmfn = 1;
+
+ if (my $s = $self->{'start_mfn'}) {
+ $log->info("skipping to MFN $s");
+ $startmfn = $s;
+ } else {
+ $self->{'start_mfn'} = $startmfn;
+ }
+
+ $maxmfn = $startmfn + $self->{limit_mfn} if ($self->{limit_mfn});
+
+ $log->info("processing ",($maxmfn-$startmfn)." records using ",( $have_openisis ? 'OpenIsis' : 'Biblio::Isis'));
+
+
+ # read database
+ for (my $mfn = $startmfn; $mfn <= $maxmfn; $mfn++) {
+
+ $log->debug("mfn: $mfn\n");
+
+ my $rec;
+
+ if ($have_openisis) {
+
+ # read record using OpenIsis
+ my $row = OpenIsis::read( $isis_db, $mfn );
+ foreach my $k (keys %{$row}) {
+ if ($k ne "mfn") {
+ foreach my $l (@{$row->{$k}}) {
+ $l = $cp->convert($l);
+ # 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'}}, $mfn;
+ }
+ }
+
+ } elsif ($have_biblio_isis) {
+ $rec = $isis_db->to_hash($mfn);
+ } else {
+ $log->logdie("hum? implementation missing?");
+ }
+
+ $log->confess("record $mfn empty?") unless ($rec);
+
+ # store
+ if ($self->{'low_mem'}) {
+ $self->{'db'}->put($mfn, $rec);
+ } else {
+ $self->{'data'}->{$mfn} = $rec;
+ }
+
+ # create lookup
+ $self->{'lookup'}->add( $rec ) if ($self->{'lookup'} && can($self->{'lookup'}->add));
+
+ $self->progress_bar($mfn,$maxmfn);
+
+ }
+
+ $self->{'current_mfn'} = -1;
+ $self->{'last_pcnt'} = 0;
+
+ $log->debug("max mfn: $maxmfn");
+
+ # store max mfn and return it.
+ return $self->{'max_mfn'} = $maxmfn;
+}
+
+=head2 fetch_rec
+
+Fetch next record from database. It will also displays progress bar.
+
+ my $rec = $webpac->fetch_rec;
+
+=cut
+
+sub fetch_rec {
+ my $self = shift;
+
+ my $log = $self->_get_logger();
+
+ $log->logconfess("it seems that you didn't load database!") unless ($self->{'current_mfn'});
+
+ if ($self->{'current_mfn'} == -1) {
+ $self->{'current_mfn'} = $self->{'start_mfn'};
+ } else {
+ $self->{'current_mfn'}++;
+ }
+
+ my $mfn = $self->{'current_mfn'};
+
+ if ($mfn > $self->{'max_mfn'}) {
+ $self->{'current_mfn'} = $self->{'max_mfn'};
+ $log->debug("at EOF");
+ return;
+ }
+
+ $self->progress_bar($mfn,$self->{'max_mfn'});
+
+ if ($self->{'low_mem'}) {
+ return $self->{'db'}->get($mfn);
+ } else {
+ return $self->{'data'}->{$mfn};
+ }
+}
+
+=head2 mfn
+
+Returns current record number (MFN).
+
+ print $webpac->mfn;
+
+=cut
+
+sub mfn {
+ my $self = shift;
+ return $self->{'current_mfn'};
+}
+
+=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
projects / webpac2 / commitdiff