/[webpac2]/trunk/lib/WebPAC/Normalize.pm
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revision 550 by dpavlin, Fri Jun 30 18:48:33 2006 UTC revision 565 by dpavlin, Sun Jul 2 20:33:13 2006 UTC
# Line 3  use Exporter 'import'; Line 3  use Exporter 'import';
3  @EXPORT = qw/  @EXPORT = qw/
4          _set_rec _set_lookup          _set_rec _set_lookup
5          _get_ds _clean_ds          _get_ds _clean_ds
6            _debug
7    
8          tag search display          tag search display
9          marc marc_indicators marc_repeatable_subfield          marc marc_indicators marc_repeatable_subfield
10            marc_compose marc_leader
11    
12          rec1 rec2 rec          rec1 rec2 rec
13          regex prefix suffix surround          regex prefix suffix surround
14          first lookup join_with          first lookup join_with
15    
16            split_rec_on
17  /;  /;
18    
19  use warnings;  use warnings;
# Line 29  WebPAC::Normalize - describe normalisato Line 33  WebPAC::Normalize - describe normalisato
33    
34  =head1 VERSION  =head1 VERSION
35    
36  Version 0.06  Version 0.09
37    
38  =cut  =cut
39    
40  our $VERSION = '0.06';  our $VERSION = '0.09';
41    
42  =head1 SYNOPSIS  =head1 SYNOPSIS
43    
# Line 153  Get all fields defined by calls to C<mar Line 157  Get all fields defined by calls to C<mar
157    
158          $marc->add_fields( WebPAC::Normalize:_get_marc_fields() );          $marc->add_fields( WebPAC::Normalize:_get_marc_fields() );
159    
   
   
160  We are using I<magic> which detect repeatable fields only from  We are using I<magic> which detect repeatable fields only from
161  sequence of field/subfield data generated by normalization.  sequence of field/subfield data generated by normalization.
162    
163  Repeatable field is created if there is second occurence of same subfield or  Repeatable field is created when there is second occurence of same subfield or
164  if any of indicators are different. This is sane for most cases except for  if any of indicators are different.
165  non-repeatable fields with repeatable subfields.  
166    This is sane for most cases. Something like:
167    
168      900a-1 900b-1 900c-1
169      900a-2 900b-2
170      900a-3
171    
172    will be created from any combination of:
173    
174      900a-1 900a-2 900a-3 900b-1 900b-2 900c-1
175    
176  You can change behaviour of that using C<marc_repeatable_subfield>.  and following rules:
177    
178      marc('900','a', rec('200','a') );
179      marc('900','b', rec('200','b') );
180      marc('900','c', rec('200','c') );
181    
182    which might not be what you have in mind. If you need repeatable subfield,
183    define it using C<marc_repeatable_subfield> like this:
184    
185    ....
186    
187  =cut  =cut
188    
189  sub _get_marc_fields {  sub _get_marc_fields {
190    
191            return if (! $marc_record || ref($marc_record) ne 'ARRAY' || $#{ $marc_record } < 0);
192    
193          # first, sort all existing fields          # first, sort all existing fields
194          # XXX might not be needed, but modern perl might randomize elements in hash          # XXX might not be needed, but modern perl might randomize elements in hash
# Line 175  sub _get_marc_fields { Line 196  sub _get_marc_fields {
196                  $a->[0] . $a->[3] cmp $b->[0] . $b->[3]                  $a->[0] . $a->[3] cmp $b->[0] . $b->[3]
197          } @{ $marc_record };          } @{ $marc_record };
198    
199            @sorted_marc_record = @{ $marc_record };        ### FIXME disable sorting
200            
201          # output marc fields          # output marc fields
202          my @m;          my @m;
203    
# Line 265  sub _get_marc_fields { Line 288  sub _get_marc_fields {
288          return @m;          return @m;
289  }  }
290    
291    =head2 _debug
292    
293    Change level of debug warnings
294    
295      _debug( 2 );
296    
297    =cut
298    
299    sub _debug {
300            my $l = shift;
301            return $debug unless defined($l);
302            warn "debug level $l" if ($l > 0);
303            $debug = $l;
304    }
305    
306  =head1 Functions to create C<data_structure>  =head1 Functions to create C<data_structure>
307    
308  Those functions generally have to first in your normalization file.  Those functions generally have to first in your normalization file.
# Line 319  sub search { Line 357  sub search {
357          $out->{$name}->{search} = \@o;          $out->{$name}->{search} = \@o;
358  }  }
359    
360    =head2 marc_leader
361    
362    Setup fields within MARC leader or get leader
363    
364      marc_leader('05','c');
365      my $leader = marc_leader();
366    
367    =cut
368    
369    sub marc_leader {
370            my ($offset,$value) = @_;
371    
372            if ($offset) {
373                    $out->{' leader'}->{ $offset } = $value;
374            } else {
375                    return $out->{' leader'};
376            }
377    }
378    
379  =head2 marc  =head2 marc
380    
381  Save value for MARC field  Save value for MARC field
# Line 378  sub marc_indicators { Line 435  sub marc_indicators {
435          @{ $marc_indicators->{$f} } = ($i1,$i2);          @{ $marc_indicators->{$f} } = ($i1,$i2);
436  }  }
437    
438    =head2 marc_compose
439    
440    Save values for each MARC subfield explicitly
441    
442      marc_compose('900',
443            'a', rec('200','a')
444            'b', rec('201','a')
445            'a', rec('200','b')
446            'c', rec('200','c')
447      );
448    
449    =cut
450    
451    sub marc_compose {
452            my $f = shift or die "marc_compose needs field";
453            die "marc_compose field must be numer" unless ($f =~ /^\d+$/);
454    
455            my ($i1,$i2) = defined($marc_indicators->{$f}) ? @{ $marc_indicators->{$f} } : (' ',' ');
456            my $m = [ $f, $i1, $i2 ];
457    
458            while (@_) {
459                    my $sf = shift or die "marc_compose $f needs subfield";
460                    my $v = shift;
461    
462                    next unless (defined($v) && $v !~ /^\s*$/);
463                    from_to($v, 'iso-8859-2', $marc_encoding) if ($marc_encoding);
464                    push @$m, ( $sf, $v );
465                    warn "## ++ marc_compose($f,$sf,$v) ", dump( $m ) if ($debug > 1);
466            }
467    
468            warn "## marc_compose(d) ", dump( $m ) if ($debug > 1);
469    
470            push @{ $marc_record }, $m if ($#{$m} > 2);
471    }
472    
473    
474  =head1 Functions to extract data from input  =head1 Functions to extract data from input
475    
# Line 547  sub join_with { Line 639  sub join_with {
639          return join($d, grep { defined($_) && $_ ne '' } @_);          return join($d, grep { defined($_) && $_ ne '' } @_);
640  }  }
641    
642    =head2 split_rec_on
643    
644    Split record subfield on some regex and take one of parts out
645    
646      $a_before_semi_column =
647            split_rec_on('200','a', /\s*;\s*/, $part);
648    
649    C<$part> is optional number of element. First element is
650    B<1>, not 0!
651    
652    If there is no C<$part> parameter or C<$part> is 0, this function will
653    return all values produced by splitting.
654    
655    =cut
656    
657    sub split_rec_on {
658            die "split_rec_on need (fld,sf,regex[,part]" if ($#_ < 2);
659    
660            my ($fld, $sf, $regex, $part) = @_;
661            warn "### regex ", ref($regex), $regex if ($debug > 2);
662    
663            my @r = rec( $fld, $sf );
664            my $v = shift @r;
665            warn "### first rec($fld,$sf) = ",dump($v) if ($debug > 2);
666    
667            my @s = split( $regex, $v );
668            warn "## split_rec_on($fld,$sf,$regex,$part) = ",dump(@s) if ($debug > 1);
669            if ($part > 0) {
670                    return $s[ $part - 1 ];
671            } else {
672                    return @s;
673            }
674    }
675    
676  # END  # END
677  1;  1;

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