use WebPAC::Common;
use base qw/WebPAC::Common/;
use Text::Iconv;
+use Data::Dumper;
=head1 NAME
=head1 VERSION
-Version 0.03
+Version 0.05
=cut
-our $VERSION = '0.03';
+our $VERSION = '0.05';
=head1 SYNOPSIS
);
$db->open('/path/to/database');
- print "database size: ",$db->size,"\n";
- while (my $rec = $db->fetch) {
- }
+ print "database size: ",$db->size,"\n";
+ while (my $rec = $db->fetch) {
+ # do something with $rec
+ }
module => 'WebPAC::Input::MARC',
code_page => 'ISO-8859-2',
low_mem => 1,
+ recode => 'char pairs',
+ no_progress_bar => 1,
);
C<module> is low-level file format module. See L<WebPAC::Input::Isis> and
Default is not to use C<low_mem> options (see L<MEMORY USAGE> below).
+C<recode> is optional string constisting of character or words pairs that
+should be replaced in input stream.
+
+C<no_progress_bar> disables progress bar output on C<STDOUT>
+
This function will also call low-level C<init> if it exists with same
parametars.
$module =~ s#::#/#g;
$module .= '.pm';
$log->debug("require low-level module $self->{module} from $module");
+
require $module;
- eval $self->{module} .'->import';
+ #eval $self->{module} .'->import';
# check if required subclasses are implemented
- foreach my $subclass (qw/open_db fetch_rec/) {
- if ( $self->can($subclass) ) {
- $log->debug("imported $subclass");
+ foreach my $subclass (qw/open_db fetch_rec init/) {
+ my $n = $self->{module} . '::' . $subclass;
+ if (! defined &{ $n }) {
+ my $missing = "missing $subclass in $self->{module}";
+ $self->{$subclass} = sub { $log->logwarn($missing) };
} else {
- $log->warn("missing $subclass in $self->{module}");
+ $self->{$subclass} = \&{ $n };
}
}
- if ($self->can('init')) {
+ if ($self->{init}) {
$log->debug("calling init");
- $self->init(@_);
+ $self->{init}->($self, @_);
}
$self->{'code_page'} ||= 'ISO-8859-2';
limit => 500,
offset => 6000,
lookup => $lookup_obj,
+ stats => 1,
);
By default, C<code_page> is assumed to be C<852>.
C<limit> is optional parametar to read just C<limit> records from database
+C<stats> create optional report about usage of fields and subfields
+
Returns size of database, regardless of C<offset> and C<limit>
parametars, see also C<size>.
my $code_page = $arg->{'code_page'} || '852';
# store data in object
- $self->{'code_page'} = $code_page;
+ $self->{'input_code_page'} = $code_page;
foreach my $v (qw/path offset limit/) {
$self->{$v} = $arg->{$v} if ($arg->{$v});
}
# create Text::Iconv object
$self->{iconv} = Text::Iconv->new($code_page,$self->{'code_page'});
- my ($db, $size) = $self->open_db(
+ my $filter_ref;
+
+ if ($self->{recode}) {
+ my @r = split(/\s/, $self->{recode});
+ if ($#r % 2 != 1) {
+ $log->logwarn("recode needs even number of elements (some number of valid pairs)");
+ } else {
+ my $recode;
+ while (@r) {
+ my $from = shift @r;
+ my $to = shift @r;
+ $recode->{$from} = $to;
+ }
+
+ my $regex = join '|' => keys %{ $recode };
+
+ $log->debug("using recode regex: $regex");
+
+ $filter_ref = sub {
+ my $t = shift;
+ $t =~ s/($regex)/$recode->{$1}/g;
+ return $t;
+ };
+
+ }
+
+ }
+
+ my ($db, $size) = $self->{open_db}->( $self,
path => $arg->{path},
+ filter => $filter_ref,
);
- unless ($db) {
+ unless (defined($db)) {
$log->logwarn("can't open database $arg->{path}, skipping...");
return;
}
return;
}
- my $offset = 1;
- my $limit = $size;
+ my $from_rec = 1;
+ my $to_rec = $size;
if (my $s = $self->{offset}) {
- $log->info("skipping to MFN $s");
- $offset = $s;
+ $log->debug("skipping to MFN $s");
+ $from_rec = $s;
} else {
- $self->{offset} = $offset;
+ $self->{offset} = $from_rec;
}
if ($self->{limit}) {
- $log->info("limiting to ",$self->{limit}," records");
- $limit = $offset + $self->{limit} - 1;
- $limit = $size if ($limit > $size);
+ $log->debug("limiting to ",$self->{limit}," records");
+ $to_rec = $from_rec + $self->{limit} - 1;
+ $to_rec = $size if ($to_rec > $size);
}
# store size for later
- $self->{size} = ($limit - $offset) ? ($limit - $offset + 1) : 0;
+ $self->{size} = ($to_rec - $from_rec) ? ($to_rec - $from_rec + 1) : 0;
- $log->info("processing $self->{size} records in $code_page, convert to $self->{code_page}");
+ $log->info("processing $self->{size}/$size records [$from_rec-$to_rec] convert $code_page -> $self->{code_page}", $self->{stats} ? ' [stats]' : '');
# read database
- for (my $pos = $offset; $pos <= $limit; $mfn++) {
+ for (my $pos = $from_rec; $pos <= $to_rec; $pos++) {
$log->debug("position: $pos\n");
- my $rec = $self->fetch_rec( $db, $pos );
+ my $rec = $self->{fetch_rec}->($self, $db, $pos );
+
+ $log->debug(sub { Dumper($rec) });
if (! $rec) {
$log->warn("record $pos empty? skipping...");
# create lookup
$self->{'lookup'}->add( $rec ) if ($rec && $self->{'lookup'});
- $self->progress_bar($pos,$limit);
+ # update counters for statistics
+ if ($self->{stats}) {
+ map {
+ my $fld = $_;
+ $self->{_stats}->{fld}->{ $fld }++;
+ if (ref($rec->{ $fld }) eq 'ARRAY') {
+ map {
+ if (ref($_) eq 'HASH') {
+ map {
+ $self->{_stats}->{sf}->{ $fld }->{ $_ }++;
+ } keys %{ $_ };
+ } else {
+ $self->{_stats}->{repeatable}->{ $fld }++;
+ }
+ } @{ $rec->{$fld} };
+ }
+ } keys %{ $rec };
+ }
+
+ $self->progress_bar($pos,$to_rec) unless ($self->{no_progress_bar});
}
$self->{last_pcnt} = 0;
# store max mfn and return it.
- $self->{max_pos} = $limit;
- $log->debug("max_pos: $limit");
+ $self->{max_pos} = $to_rec;
+ $log->debug("max_pos: $to_rec");
return $size;
}
return;
}
- $self->progress_bar($mfn,$self->{max_pos});
+ $self->progress_bar($mfn,$self->{max_pos}) unless ($self->{no_progress_bar});
my $rec;
return $self->{pos} = (($pos - 1) || -1);
}
+=head2 stats
+
+Dump statistics about field and subfield usage
+
+ print $input->stats;
+
+=cut
+
+sub stats {
+ my $self = shift;
+
+ my $log = $self->_get_logger();
+
+ my $s = $self->{_stats};
+ if (! $s) {
+ $log->warn("called stats, but there is no statistics collected");
+ return;
+ }
+
+ my $max_fld = 0;
+
+ my $out = join("\n",
+ map {
+ my $f = $_ || die "no field";
+ my $v = $s->{fld}->{$f} || die "no s->{fld}->{$f}";
+ $max_fld = $v if ($v > $max_fld);
+
+ my $o = sprintf("%4d %d ~", $f, $v);
+
+ if (defined($s->{sf}->{$f})) {
+ map {
+ $o .= sprintf(" %s:%d", $_, $s->{sf}->{$f}->{$_});
+ } sort keys %{ $s->{sf}->{$f} };
+ }
+
+ if (my $v_r = $s->{repeatable}->{$f}) {
+ $o .= " ($v_r)" if ($v_r != $v);
+ }
+
+ $o;
+ } sort { $a <=> $b } keys %{ $s->{fld} }
+ );
+
+ $log->debug( sub { Dumper($s) } );
+
+ return $out;
+}
=head1 MEMORY USAGE
projects / webpac2 / blobdiff