/[webpac2]/trunk/lib/WebPAC/Input.pm
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
ViewVC logotype

Diff of /trunk/lib/WebPAC/Input.pm

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 416 by dpavlin, Sun Feb 26 23:21:50 2006 UTC revision 593 by dpavlin, Sun Jul 9 15:22:39 2006 UTC
# Line 3  package WebPAC::Input; Line 3  package WebPAC::Input;
3  use warnings;  use warnings;
4  use strict;  use strict;
5    
6    use blib;
7    
8  use WebPAC::Common;  use WebPAC::Common;
9  use base qw/WebPAC::Common/;  use base qw/WebPAC::Common/;
10  use Text::Iconv;  use Text::Iconv;
# Line 14  WebPAC::Input - read different file form Line 16  WebPAC::Input - read different file form
16    
17  =head1 VERSION  =head1 VERSION
18    
19  Version 0.04  Version 0.08
20    
21  =cut  =cut
22    
23  our $VERSION = '0.04';  our $VERSION = '0.08';
24    
25  =head1 SYNOPSIS  =head1 SYNOPSIS
26    
# Line 42  Perhaps a little code snippet. Line 44  Perhaps a little code snippet.
44      my $db = WebPAC::Input->new(      my $db = WebPAC::Input->new(
45          module => 'WebPAC::Input::ISIS',          module => 'WebPAC::Input::ISIS',
46                  config => $config,                  config => $config,
                 lookup => $lookup_obj,  
47                  low_mem => 1,                  low_mem => 1,
48      );      );
49    
# Line 62  Create new input database object. Line 63  Create new input database object.
63    
64    my $db = new WebPAC::Input(    my $db = new WebPAC::Input(
65          module => 'WebPAC::Input::MARC',          module => 'WebPAC::Input::MARC',
66          code_page => 'ISO-8859-2',          encoding => 'ISO-8859-2',
67          low_mem => 1,          low_mem => 1,
68          recode => 'char pairs',          recode => 'char pairs',
69            no_progress_bar => 1,
70    );    );
71    
72  C<module> is low-level file format module. See L<WebPAC::Input::Isis> and  C<module> is low-level file format module. See L<WebPAC::Input::Isis> and
73  L<WebPAC::Input::MARC>.  L<WebPAC::Input::MARC>.
74    
75  Optional parametar C<code_page> specify application code page (which will be  Optional parametar C<encoding> specify application code page (which will be
76  used internally). This should probably be your terminal encoding, and by  used internally). This should probably be your terminal encoding, and by
77  default, it C<ISO-8859-2>.  default, it C<ISO-8859-2>.
78    
79  Default is not to use C<low_mem> options (see L<MEMORY USAGE> below).  Default is not to use C<low_mem> options (see L<MEMORY USAGE> below).
80    
81    C<recode> is optional string constisting of character or words pairs that
82    should be replaced in input stream.
83    
84    C<no_progress_bar> disables progress bar output on C<STDOUT>
85    
86  This function will also call low-level C<init> if it exists with same  This function will also call low-level C<init> if it exists with same
87  parametars.  parametars.
88    
# Line 88  sub new { Line 95  sub new {
95    
96          my $log = $self->_get_logger;          my $log = $self->_get_logger;
97    
98            $log->logconfess("code_page argument is not suppored any more. change it to encoding") if ($self->{lookup});
99            $log->logconfess("lookup argument is not suppored any more. rewrite call to lookup_ref") if ($self->{lookup});
100    
101          $log->logconfess("specify low-level file format module") unless ($self->{module});          $log->logconfess("specify low-level file format module") unless ($self->{module});
102          my $module = $self->{module};          my $module = $self->{module};
103          $module =~ s#::#/#g;          $module =~ s#::#/#g;
# Line 113  sub new { Line 123  sub new {
123                  $self->{init}->($self, @_);                  $self->{init}->($self, @_);
124          }          }
125    
126          $self->{'code_page'} ||= 'ISO-8859-2';          $self->{'encoding'} ||= 'ISO-8859-2';
127    
128          # running with low_mem flag? well, use DBM::Deep then.          # running with low_mem flag? well, use DBM::Deep then.
129          if ($self->{'low_mem'}) {          if ($self->{'low_mem'}) {
# Line 154  This function will read whole database i Line 164  This function will read whole database i
164          limit => 500,          limit => 500,
165          offset => 6000,          offset => 6000,
166          lookup => $lookup_obj,          lookup => $lookup_obj,
167            stats => 1,
168            lookup_ref => sub {
169                    my ($k,$v) = @_;
170                    # store lookup $k => $v
171            },
172   );   );
173    
174  By default, C<code_page> is assumed to be C<852>.  By default, C<code_page> is assumed to be C<852>.
# Line 162  C<offset> is optional parametar to posit Line 177  C<offset> is optional parametar to posit
177    
178  C<limit> is optional parametar to read just C<limit> records from database  C<limit> is optional parametar to read just C<limit> records from database
179    
180    C<stats> create optional report about usage of fields and subfields
181    
182    C<lookup_coderef> is closure to call when adding key => $value combinations to
183    lookup.
184    
185  Returns size of database, regardless of C<offset> and C<limit>  Returns size of database, regardless of C<offset> and C<limit>
186  parametars, see also C<size>.  parametars, see also C<size>.
187    
# Line 173  sub open { Line 193  sub open {
193    
194          my $log = $self->_get_logger();          my $log = $self->_get_logger();
195    
196            $log->logconfess("lookup argument is not suppored any more. rewrite call to lookup_coderef") if ($arg->{lookup});
197            $log->logconfess("lookup_coderef must be CODE, not ",ref($arg->{lookup_coderef}))
198                    if ($arg->{lookup_coderef} && ref($arg->{lookup_coderef}) ne 'CODE');
199    
200          $log->logcroak("need path") if (! $arg->{'path'});          $log->logcroak("need path") if (! $arg->{'path'});
201          my $code_page = $arg->{'code_page'} || '852';          my $code_page = $arg->{'code_page'} || '852';
202    
# Line 183  sub open { Line 207  sub open {
207          }          }
208    
209          # create Text::Iconv object          # create Text::Iconv object
210          $self->{iconv} = Text::Iconv->new($code_page,$self->{'code_page'});          $self->{iconv} = Text::Iconv->new($code_page,$self->{'encoding'});      ## FIXME remove!
211    
212          my $filter_ref;          my $filter_ref;
213    
# Line 216  sub open { Line 240  sub open {
240          my ($db, $size) = $self->{open_db}->( $self,          my ($db, $size) = $self->{open_db}->( $self,
241                  path => $arg->{path},                  path => $arg->{path},
242                  filter => $filter_ref,                  filter => $filter_ref,
243                    %{ $arg },
244          );          );
245    
246          unless ($db) {          unless (defined($db)) {
247                  $log->logwarn("can't open database $arg->{path}, skipping...");                  $log->logwarn("can't open database $arg->{path}, skipping...");
248                  return;                  return;
249          }          }
# Line 232  sub open { Line 257  sub open {
257          my $to_rec = $size;          my $to_rec = $size;
258    
259          if (my $s = $self->{offset}) {          if (my $s = $self->{offset}) {
260                  $log->info("skipping to MFN $s");                  $log->debug("skipping to MFN $s");
261                  $from_rec = $s;                  $from_rec = $s;
262          } else {          } else {
263                  $self->{offset} = $from_rec;                  $self->{offset} = $from_rec;
# Line 247  sub open { Line 272  sub open {
272          # store size for later          # store size for later
273          $self->{size} = ($to_rec - $from_rec) ? ($to_rec - $from_rec + 1) : 0;          $self->{size} = ($to_rec - $from_rec) ? ($to_rec - $from_rec + 1) : 0;
274    
275          $log->info("processing $self->{size}/$size records [$from_rec-$to_rec] convert $code_page -> $self->{code_page}");          $log->info("processing $self->{size}/$size records [$from_rec-$to_rec] convert $code_page -> $self->{encoding}", $self->{stats} ? ' [stats]' : '');
276    
277          # read database          # read database
278          for (my $pos = $from_rec; $pos <= $to_rec; $pos++) {          for (my $pos = $from_rec; $pos <= $to_rec; $pos++) {
# Line 271  sub open { Line 296  sub open {
296                  }                  }
297    
298                  # create lookup                  # create lookup
299                  $self->{'lookup'}->add( $rec ) if ($rec && $self->{'lookup'});                  $arg->{'lookup_coderef'}->( $rec ) if ($rec && $arg->{'lookup_coderef'});
300    
301                  $self->progress_bar($pos,$to_rec);                  # update counters for statistics
302                    if ($self->{stats}) {
303    
304                            foreach my $fld (keys %{ $rec }) {
305                                    $self->{_stats}->{fld}->{ $fld }++;
306    
307                                    $log->logdie("invalid record fild $fld, not ARRAY")
308                                            unless (ref($rec->{ $fld }) eq 'ARRAY');
309            
310                                    foreach my $row (@{ $rec->{$fld} }) {
311    
312                                            if (ref($row) eq 'HASH') {
313    
314                                                    foreach my $sf (keys %{ $row }) {
315                                                            $self->{_stats}->{sf}->{ $fld }->{ $sf }->{count}++;
316                                                            $self->{_stats}->{sf}->{ $fld }->{ $sf }->{repeatable}++
317                                                                            if (ref($row->{$sf}) eq 'ARRAY');
318                                                    }
319    
320                                            } else {
321                                                    $self->{_stats}->{repeatable}->{ $fld }++;
322                                            }
323                                    }
324                            }
325                    }
326    
327                    $self->progress_bar($pos,$to_rec) unless ($self->{no_progress_bar});
328    
329          }          }
330    
# Line 319  sub fetch { Line 370  sub fetch {
370                  return;                  return;
371          }          }
372    
373          $self->progress_bar($mfn,$self->{max_pos});          $self->progress_bar($mfn,$self->{max_pos}) unless ($self->{no_progress_bar});
374    
375          my $rec;          my $rec;
376    
# Line 394  sub seek { Line 445  sub seek {
445          return $self->{pos} = (($pos - 1) || -1);          return $self->{pos} = (($pos - 1) || -1);
446  }  }
447    
448    =head2 stats
449    
450    Dump statistics about field and subfield usage
451    
452      print $input->stats;
453    
454    =cut
455    
456    sub stats {
457            my $self = shift;
458    
459            my $log = $self->_get_logger();
460    
461            my $s = $self->{_stats};
462            if (! $s) {
463                    $log->warn("called stats, but there is no statistics collected");
464                    return;
465            }
466    
467            my $max_fld = 0;
468    
469            my $out = join("\n",
470                    map {
471                            my $f = $_ || die "no field";
472                            my $v = $s->{fld}->{$f} || die "no s->{fld}->{$f}";
473                            $max_fld = $v if ($v > $max_fld);
474    
475                            my $o = sprintf("%4s %d ~", $f, $v);
476    
477                            if (defined($s->{sf}->{$f})) {
478                                    map {
479                                            $o .= sprintf(" %s:%d%s", $_,
480                                                    $s->{sf}->{$f}->{$_}->{count},
481                                                    $s->{sf}->{$f}->{$_}->{repeatable} ? '*' : '',
482                                            );
483                                    } sort keys %{ $s->{sf}->{$f} };
484                            }
485    
486                            if (my $v_r = $s->{repeatable}->{$f}) {
487                                    $o .= " ($v_r)" if ($v_r != $v);
488                            }
489    
490                            $o;
491                    } sort { $a cmp $b } keys %{ $s->{fld} }
492            );
493    
494            $log->debug( sub { Dumper($s) } );
495    
496            return $out;
497    }
498    
499  =head1 MEMORY USAGE  =head1 MEMORY USAGE
500    
Legend:
Removed from v.416  
changed lines
  Added in v.593
  ViewVC Help
Powered by ViewVC 1.1.26