--- trunk/lib/WebPAC/Input.pm 2005/12/18 21:06:51 287 +++ trunk/lib/WebPAC/Input.pm 2006/05/16 13:08:31 513 @@ -8,6 +8,7 @@ use WebPAC::Common; use base qw/WebPAC::Common/; use Text::Iconv; +use Data::Dumper; =head1 NAME @@ -15,11 +16,11 @@ =head1 VERSION -Version 0.03 +Version 0.05 =cut -our $VERSION = '0.03'; +our $VERSION = '0.05'; =head1 SYNOPSIS @@ -48,9 +49,10 @@ ); $db->open('/path/to/database'); - print "database size: ",$db->size,"\n"; - while (my $rec = $db->fetch) { - } + print "database size: ",$db->size,"\n"; + while (my $rec = $db->fetch) { + # do something with $rec + } @@ -64,6 +66,8 @@ module => 'WebPAC::Input::MARC', code_page => 'ISO-8859-2', low_mem => 1, + recode => 'char pairs', + no_progress_bar => 1, ); C is low-level file format module. See L and @@ -75,6 +79,11 @@ Default is not to use C options (see L below). +C is optional string constisting of character or words pairs that +should be replaced in input stream. + +C disables progress bar output on C + This function will also call low-level C if it exists with same parametars. @@ -92,21 +101,24 @@ $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'; @@ -150,6 +162,7 @@ limit => 500, offset => 6000, lookup => $lookup_obj, + stats => 1, ); By default, C is assumed to be C<852>. @@ -158,6 +171,8 @@ C is optional parametar to read just C records from database +C create optional report about usage of fields and subfields + Returns size of database, regardless of C and C parametars, see also C. @@ -173,7 +188,7 @@ 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}); } @@ -181,11 +196,40 @@ # 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; } @@ -195,33 +239,35 @@ 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; $pos++) { + 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..."); @@ -238,7 +284,26 @@ # 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}); } @@ -246,8 +311,8 @@ $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; } @@ -284,7 +349,7 @@ return; } - $self->progress_bar($mfn,$self->{max_pos}); + $self->progress_bar($mfn,$self->{max_pos}) unless ($self->{no_progress_bar}); my $rec; @@ -359,6 +424,53 @@ 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