source: gsdl/trunk/perllib/basebuildproc.pm@ 15725

Last change on this file since 15725 was 15725, checked in by mdewsnip, 16 years ago

(Adding new DB support) Added $infodb_type as first argument to all the dbutil functions.

  • Property svn:keywords set to Author Date Id Revision
File size: 17.7 KB
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1###########################################################################
2#
3# basebuildproc.pm --
4# A component of the Greenstone digital library software
5# from the New Zealand Digital Library Project at the
6# University of Waikato, New Zealand.
7#
8# Copyright (C) 1999 New Zealand Digital Library Project
9#
10# This program is free software; you can redistribute it and/or modify
11# it under the terms of the GNU General Public License as published by
12# the Free Software Foundation; either version 2 of the License, or
13# (at your option) any later version.
14#
15# This program is distributed in the hope that it will be useful,
16# but WITHOUT ANY WARRANTY; without even the implied warranty of
17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18# GNU General Public License for more details.
19#
20# You should have received a copy of the GNU General Public License
21# along with this program; if not, write to the Free Software
22# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23#
24###########################################################################
25
26# This document processor outputs a document for indexing (should be
27# implemented by subclass) and storing in the database
28
29package basebuildproc;
30
31eval {require bytes};
32
33use classify;
34use dbutil;
35use doc;
36use docproc;
37use strict; no strict 'subs';
38use util;
39
40BEGIN {
41 @basebuildproc::ISA = ('docproc');
42}
43
44sub new()
45 {
46 my ($class, $collection, $source_dir, $build_dir, $keepold, $verbosity, $outhandle) = @_;
47 my $self = new docproc ();
48
49 # outhandle is where all the debugging info goes
50 # output_handle is where the output of the plugins is piped
51 # to (i.e. mg, database etc.)
52 $outhandle = STDERR unless defined $outhandle;
53
54 $self->{'collection'} = $collection;
55 $self->{'source_dir'} = $source_dir;
56 $self->{'build_dir'} = $build_dir;
57 $self->{'keepold'} = $keepold;
58 $self->{'verbosity'} = $verbosity;
59 $self->{'outhandle'} = $outhandle;
60
61 $self->{'classifiers'} = [];
62 $self->{'mode'} = "text";
63 $self->{'assocdir'} = $build_dir;
64 $self->{'dontdb'} = {};
65
66 $self->{'index'} = "section:text";
67 $self->{'indexexparr'} = [];
68
69 my $found_num_data = 0;
70 my $buildconfigfile = undef;
71
72 if ($keepold) {
73 # For incremental building need to seed num_docs etc from values
74 # stored in build.cfg (if present)
75 print STDERR "Keepold!\n";
76 $buildconfigfile = &util::filename_cat($build_dir, "build.cfg");
77 print STDERR "Build cfg: $buildconfigfile\n";
78 if (-e $buildconfigfile) {
79 $found_num_data = 1;
80 }
81 else {
82 # try the index dir
83 $buildconfigfile = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},
84 "index", "build.cfg");
85 print STDERR "Index cfg: $buildconfigfile\n";
86 if (-e $buildconfigfile) {
87 $found_num_data = 1;
88 }
89 }
90
91 }
92 #else
93 # {
94 # print STDERR "Removeold!\n";
95 # }
96
97 if ($found_num_data)
98 {
99 #print STDERR "Found_Num_Data!\n";
100 my $buildcfg = &colcfg::read_build_cfg($buildconfigfile);
101 $self->{'starting_num_docs'} = $buildcfg->{'numdocs'};
102 #print STDERR "- num_docs: $self->{'starting_num_docs'}\n";
103 $self->{'starting_num_sections'} = $buildcfg->{'numsections'};
104 #print STDERR "- num_sections: $self->{'starting_num_sections'}\n";
105 $self->{'starting_num_bytes'} = $buildcfg->{'numbytes'};
106 #print STDERR "- num_bytes: $self->{'starting_num_bytes'}\n";
107 }
108 else
109 {
110 #print STDERR "NOT Found_Num_Data!\n";
111 $self->{'starting_num_docs'} = 0;
112 $self->{'starting_num_sections'} = 0;
113 $self->{'starting_num_bytes'} = 0;
114 }
115
116 $self->{'output_handle'} = "STDOUT";
117 $self->{'num_docs'} = $self->{'starting_num_docs'};
118 $self->{'num_sections'} = $self->{'starting_num_sections'};
119 $self->{'num_bytes'} = $self->{'starting_num_bytes'};
120
121 $self->{'num_processed_bytes'} = 0;
122 $self->{'store_text'} = 1;
123
124 # what level (section/document) the database - indexer intersection is
125 $self->{'db_level'} = "section";
126 #used by browse interface
127 $self->{'doclist'} = [];
128
129 $self->{'indexing_text'} = 0;
130
131 return bless $self, $class;
132
133}
134
135sub reset {
136 my $self = shift (@_);
137
138 $self->{'num_docs'} = $self->{'starting_num_docs'};
139 $self->{'num_sections'} = $self->{'starting_num_sections'};
140 $self->{'num_bytes'} = $self->{'starting_num_bytes'};
141
142 $self->{'num_processed_bytes'} = 0;
143}
144
145sub zero_reset {
146 my $self = shift (@_);
147
148 $self->{'num_docs'} = 0;
149 $self->{'num_sections'} = 0;
150 $self->{'num_bytes'} = 0;
151
152 $self->{'num_processed_bytes'} = 0;
153}
154
155sub is_incremental_capable
156{
157 # By default we return 'no' as the answer
158 # Safer to assume non-incremental to start with, and then override in
159 # inherited classes that are.
160
161 return 0;
162}
163
164sub get_num_docs {
165 my $self = shift (@_);
166
167 return $self->{'num_docs'};
168}
169
170sub get_num_sections {
171 my $self = shift (@_);
172
173 return $self->{'num_sections'};
174}
175
176# num_bytes is the actual number of bytes in the collection
177# this is normally the same as what's processed during text compression
178sub get_num_bytes {
179 my $self = shift (@_);
180
181 return $self->{'num_bytes'};
182}
183
184# num_processed_bytes is the number of bytes actually passed
185# to mg for the current index
186sub get_num_processed_bytes {
187 my $self = shift (@_);
188
189 return $self->{'num_processed_bytes'};
190}
191
192sub set_output_handle {
193 my $self = shift (@_);
194 my ($handle) = @_;
195
196 $self->{'output_handle'} = $handle;
197}
198
199
200sub set_mode {
201 my $self = shift (@_);
202 my ($mode) = @_;
203
204 $self->{'mode'} = $mode;
205}
206
207sub get_mode {
208 my $self = shift (@_);
209
210 return $self->{'mode'};
211}
212
213sub set_assocdir {
214 my $self = shift (@_);
215 my ($assocdir) = @_;
216
217 $self->{'assocdir'} = $assocdir;
218}
219
220sub set_dontdb {
221 my $self = shift (@_);
222 my ($dontdb) = @_;
223
224 $self->{'dontdb'} = $dontdb;
225}
226
227sub set_infodbtype
228{
229 my $self = shift(@_);
230 my $infodbtype = shift(@_);
231 $self->{'infodbtype'} = $infodbtype;
232}
233
234sub set_index {
235 my $self = shift (@_);
236 my ($index, $indexexparr) = @_;
237
238 $self->{'index'} = $index;
239 $self->{'indexexparr'} = $indexexparr if defined $indexexparr;
240}
241
242sub set_index_languages {
243 my $self = shift (@_);
244 my ($lang_meta, $langarr) = @_;
245 $self->{'lang_meta'} = $lang_meta;
246 $self->{'langarr'} = $langarr;
247}
248
249sub get_index {
250 my $self = shift (@_);
251
252 return $self->{'index'};
253}
254
255sub set_classifiers {
256 my $self = shift (@_);
257 my ($classifiers) = @_;
258
259 $self->{'classifiers'} = $classifiers;
260}
261
262sub set_indexing_text {
263 my $self = shift (@_);
264 my ($indexing_text) = @_;
265
266 $self->{'indexing_text'} = $indexing_text;
267}
268
269sub get_indexing_text {
270 my $self = shift (@_);
271
272 return $self->{'indexing_text'};
273}
274
275sub set_store_text {
276 my $self = shift (@_);
277 my ($store_text) = @_;
278
279 $self->{'store_text'} = $store_text;
280}
281sub get_doc_list {
282 my $self = shift(@_);
283
284 return @{$self->{'doclist'}};
285}
286
287# the standard database level is section, but you may want to change it to document
288sub set_db_level {
289 my $self= shift (@_);
290 my ($db_level) = @_;
291
292 $self->{'db_level'} = $db_level;
293}
294
295sub set_sections_index_document_metadata {
296 my $self= shift (@_);
297 my ($index_type) = @_;
298
299 $self->{'sections_index_document_metadata'} = $index_type;
300}
301sub process {
302 my $self = shift (@_);
303 my $method = $self->{'mode'};
304
305 $self->$method(@_);
306}
307
308
309
310sub infodb_metadata_stats
311{
312 my $self = shift (@_);
313 my ($field) = @_;
314
315 # Keep some statistics relating to metadata sets used and
316 # frequency of particular metadata fields within each set
317
318 # Union of metadata prefixes and frequency of fields
319 # (both scoped for this document alone, and across whole collection)
320
321 if ($field =~ m/^(.+)\.(.*)$/) {
322 my $prefix = $1;
323 my $core_field = $2;
324
325 $self->{'doc_mdprefix_fields'}->{$prefix}->{$core_field}++;
326 $self->{'mdprefix_fields'}->{$prefix}->{$core_field}++;
327 }
328 elsif ($field =~ m/^[[:upper:]]/) {
329 # implicit 'ex' metadata set
330
331 $self->{'doc_mdprefix_fields'}->{'ex'}->{$field}++;
332 $self->{'mdprefix_fields'}->{'ex'}->{$field}++;
333 }
334
335}
336
337
338sub infodb {
339 my $self = shift (@_);
340 my ($doc_obj, $filename) = @_;
341
342 # only output this document if it is a "indexed_doc" or "info_doc" (database only) document
343 my $doctype = $doc_obj->get_doc_type();
344 return if ($doctype ne "indexed_doc" && $doctype ne "info_doc");
345
346 my $archivedir = "";
347 if (defined $filename)
348 {
349 # doc_obj derived directly from file
350 my ($dir) = $filename =~ /^(.*?)(?:\/|\\)[^\/\\]*$/;
351 $dir = "" unless defined $dir;
352 $dir =~ s/\\/\//g;
353 $dir =~ s/^\/+//;
354 $dir =~ s/\/+$//;
355
356 $archivedir = $dir;
357
358 # resolve the final filenames of the files associated with this document
359 $self->assoc_files ($doc_obj, $archivedir);
360 }
361 else
362 {
363 # doc_obj reconstructed from database (has metadata, doc structure but no text)
364 my $top_section = $doc_obj->get_top_section();
365 $archivedir = $doc_obj->get_metadata_element($top_section,"archivedir");
366 }
367
368 #add this document to the browse structure
369 push(@{$self->{'doclist'}},$doc_obj->get_OID())
370 unless ($doctype eq "classification");
371
372 # classify this document
373 &classify::classify_doc ($self->{'classifiers'}, $doc_obj);
374
375 # this is another document
376 $self->{'num_docs'} += 1 unless ($doctype eq "classification");
377
378 # is this a paged or a hierarchical document
379 my ($thistype, $childtype) = $self->get_document_type ($doc_obj);
380
381 my $section = $doc_obj->get_top_section ();
382 my $doc_OID = $doc_obj->get_OID();
383 my $first = 1;
384 my $infodb_handle = $self->{'output_handle'};
385
386 $self->{'doc_mdprefix_fields'} = {};
387
388 while (defined $section)
389 {
390 my $section_OID = $doc_OID;
391 if ($section ne "")
392 {
393 $section_OID = $doc_OID . "." . $section;
394 }
395 my %section_infodb = ();
396
397 # update a few statistics
398 $self->{'num_bytes'} += $doc_obj->get_text_length ($section);
399 $self->{'num_sections'} += 1 unless ($doctype eq "classification");
400
401 # output the fact that this document is a document (unless doctype
402 # has been set to something else from within a plugin
403 my $dtype = $doc_obj->get_metadata_element ($section, "doctype");
404 if (!defined $dtype || $dtype !~ /\w/) {
405 $section_infodb{"doctype"} = [ "doc" ];
406 }
407
408 # Output whether this node contains text
409 #
410 # If doc_obj reconstructed from database file then no need to
411 # explicitly add <hastxt> as this is preserved as metadata when
412 # the database file is loaded in
413 if (defined $filename)
414 {
415 # doc_obj derived directly from file
416 if ($doc_obj->get_text_length($section) > 0) {
417 $section_infodb{"hastxt"} = [ "1" ];
418 } else {
419 $section_infodb{"hastxt"} = [ "0" ];
420 }
421 }
422
423 # output all the section metadata
424 my $metadata = $doc_obj->get_all_metadata ($section);
425 foreach my $pair (@$metadata) {
426 my ($field, $value) = (@$pair);
427
428 if ($field ne "Identifier" && $field !~ /^gsdl/ &&
429 defined $value && $value ne "") {
430
431 # escape problematic stuff
432 $value =~ s/\\/\\\\/g;
433 $value =~ s/\n/\\n/g;
434 $value =~ s/\r/\\r/g;
435
436 # special case for URL metadata
437 if ($field =~ /^URL$/i) {
438 &dbutil::write_infodb_entry($self->{'infodbtype'}, $infodb_handle, $value, { 'section' => [ $section_OID ] });
439 }
440
441 if (!defined $self->{'dontdb'}->{$field}) {
442 push(@{$section_infodb{$field}}, $value);
443
444 if ($section eq "")
445 {
446 $self->infodb_metadata_stats($field);
447 }
448 }
449 }
450 }
451
452 if ($section eq "")
453 {
454 my $doc_mdprefix_fields = $self->{'doc_mdprefix_fields'};
455
456 foreach my $prefix (keys %$doc_mdprefix_fields)
457 {
458 push(@{$section_infodb{"metadataset"}}, $prefix);
459
460 foreach my $field (keys %{$doc_mdprefix_fields->{$prefix}})
461 {
462 push(@{$section_infodb{"metadatalist-$prefix"}}, $field);
463
464 my $val = $doc_mdprefix_fields->{$prefix}->{$field};
465 push(@{$section_infodb{"metadatafreq-$prefix-$field"}}, $val);
466 }
467 }
468 }
469
470 # If doc_obj reconstructed from database file then no need to
471 # explicitly add <archivedir> as this is preserved as metadata when
472 # the database file is loaded in
473 if (defined $filename)
474 {
475 # output archivedir if at top level
476 if ($section eq $doc_obj->get_top_section()) {
477 $section_infodb{"archivedir"} = [ $archivedir ];
478 }
479 }
480
481 # output document display type
482 if ($first) {
483 $section_infodb{"thistype"} = [ $thistype ];
484 }
485
486 if ($self->{'db_level'} eq "document") {
487 # doc num is num_docs not num_sections
488 # output the matching document number
489 $section_infodb{"docnum"} = [ $self->{'num_docs'} ];
490 }
491 else {
492 # output a list of children
493 my $children = $doc_obj->get_children ($section);
494 if (scalar(@$children) > 0) {
495 $section_infodb{"childtype"} = [ $childtype ];
496 my $contains = "";
497 foreach my $child (@$children)
498 {
499 $contains .= ";" unless ($contains eq "");
500 if ($child =~ /^.*?\.(\d+)$/)
501 {
502 $contains .= "\".$1";
503 }
504 else
505 {
506 $contains .= "\".$child";
507 }
508 }
509 $section_infodb{"contains"} = [ $contains ];
510 }
511 # output the matching doc number
512 $section_infodb{"docnum"} = [ $self->{'num_sections'} ];
513 }
514
515 &dbutil::write_infodb_entry($self->{'infodbtype'}, $infodb_handle, $section_OID, \%section_infodb);
516
517 # output a database entry for the document number
518 if ($self->{'db_level'} eq "document") {
519 &dbutil::write_infodb_entry($self->{'infodbtype'}, $infodb_handle, $self->{'num_docs'}, { 'section' => [ $doc_OID ] });
520 }
521 else {
522 &dbutil::write_infodb_entry($self->{'infodbtype'}, $infodb_handle, $self->{'num_sections'}, { 'section' => [ $section_OID ] });
523 }
524
525 $first = 0;
526 $section = $doc_obj->get_next_section($section);
527 last if ($self->{'db_level'} eq "document"); # if no sections wanted, only add the docs
528 }
529}
530
531
532sub text {
533 my $self = shift (@_);
534 my ($doc_obj) = @_;
535
536 my $handle = $self->{'outhandle'};
537 print $handle "basebuildproc::text function must be implemented in sub classes\n";
538 die "\n";
539}
540
541# should the document be indexed - according to the subcollection and language
542# specification.
543sub is_subcollection_doc {
544 my $self = shift (@_);
545 my ($doc_obj) = @_;
546
547 my $indexed_doc = 1;
548 foreach my $indexexp (@{$self->{'indexexparr'}}) {
549 $indexed_doc = 0;
550 my ($field, $exp, $options) = split /\//, $indexexp;
551 if (defined ($field) && defined ($exp)) {
552 my ($bool) = $field =~ /^(.)/;
553 $field =~ s/^.// if $bool eq '!';
554 my @metadata_values;
555 if ($field =~ /^filename$/i) {
556 push(@metadata_values, $doc_obj->get_source_filename());
557 }
558 else {
559 @metadata_values = @{$doc_obj->get_metadata($doc_obj->get_top_section(), $field)};
560 }
561 next unless @metadata_values;
562 foreach my $metadata_value (@metadata_values) {
563 if ($bool eq '!') {
564 if ($options =~ /^i$/i) {
565 if ($metadata_value !~ /$exp/i) {$indexed_doc = 1; last;}
566 } else {
567 if ($metadata_value !~ /$exp/) {$indexed_doc = 1; last;}
568 }
569 } else {
570 if ($options =~ /^i$/i) {
571 if ($metadata_value =~ /$exp/i) {$indexed_doc = 1; last;}
572 } else {
573 if ($metadata_value =~ /$exp/) {$indexed_doc = 1; last;}
574 }
575 }
576 }
577
578 last if ($indexed_doc == 1);
579 }
580 }
581
582 # if this doc is so far in the sub collection, and we have lang info,
583 # now we check the languages to see if it matches
584 if($indexed_doc && defined $self->{'lang_meta'}) {
585 $indexed_doc = 0;
586 my $field = $doc_obj->get_metadata_element($doc_obj->get_top_section(), $self->{'lang_meta'});
587 if (defined $field) {
588 foreach my $lang (@{$self->{'langarr'}}) {
589 my ($bool) = $lang =~ /^(.)/;
590 if ($bool eq '!') {
591 $lang =~ s/^.//;
592 if ($field !~ /$lang/) {
593 $indexed_doc = 1; last;
594 }
595 } else {
596 if ($field =~ /$lang/) {
597 $indexed_doc = 1; last;
598 }
599 }
600 }
601 }
602 }
603 return $indexed_doc;
604
605}
606
607# use 'Paged' if document has no more than 2 levels
608# and each section at second level has a number for
609# Title metadata
610# also use Paged if gsdlthistype metadata is set to Paged
611sub get_document_type {
612 my $self = shift (@_);
613 my ($doc_obj) = @_;
614
615 my $thistype = "VList";
616 my $childtype = "VList";
617 my $title;
618 my @tmp = ();
619
620 my $section = $doc_obj->get_top_section ();
621
622 my $gsdlthistype = $doc_obj->get_metadata_element ($section, "gsdlthistype");
623 if (defined $gsdlthistype) {
624 if ($gsdlthistype eq "Paged") {
625 $childtype = "Paged";
626 if ($doc_obj->get_text_length ($doc_obj->get_top_section())) {
627 $thistype = "Paged";
628 } else {
629 $thistype = "Invisible";
630 }
631
632 return ($thistype, $childtype);
633 } elsif ($gsdlthistype eq "Hierarchy") {
634 return ($thistype, $childtype); # use VList, VList
635 }
636 }
637 my $first = 1;
638 while (defined $section) {
639 @tmp = split /\./, $section;
640 if (scalar(@tmp) > 1) {
641 return ($thistype, $childtype);
642 }
643 if (!$first) {
644 $title = $doc_obj->get_metadata_element ($section, "Title");
645 if (!defined $title || $title !~ /^\d+$/) {
646 return ($thistype, $childtype);
647 }
648 }
649 $first = 0;
650 $section = $doc_obj->get_next_section($section);
651 }
652 if ($doc_obj->get_text_length ($doc_obj->get_top_section())) {
653 $thistype = "Paged";
654 } else {
655 $thistype = "Invisible";
656 }
657 $childtype = "Paged";
658 return ($thistype, $childtype);
659}
660
661sub assoc_files() {
662 my $self = shift (@_);
663 my ($doc_obj, $archivedir) = @_;
664 my ($afile);
665
666 foreach my $assoc_file (@{$doc_obj->get_assoc_files()}) {
667 #rint STDERR "Processing associated file - copy " . $assoc_file->[0] . " to " . $assoc_file->[1] . "\n";
668 # if assoc file starts with a slash, we put it relative to the assoc
669 # dir, otherwise it is relative to the HASH... directory
670 if ($assoc_file->[1] =~ m@^[/\\]@) {
671 $afile = &util::filename_cat($self->{'assocdir'}, $assoc_file->[1]);
672 } else {
673 $afile = &util::filename_cat($self->{'assocdir'}, $archivedir, $assoc_file->[1]);
674 }
675 &util::hard_link ($assoc_file->[0], $afile);
676 }
677}
678
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