source: main/trunk/greenstone2/perllib/basebuilder.pm@ 24342

Last change on this file since 24342 was 24342, checked in by davidb, 13 years ago

Support for building non-text indexes that are orthogonol to the usual text-based index

  • Property svn:keywords set to Author Date Id Revision
File size: 25.2 KB
Line 
1###########################################################################
2#
3# basebuilder.pm -- base class for collection builders
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
26package basebuilder;
27
28use strict;
29no strict 'refs'; # allow filehandles to be variables and viceversa
30
31use classify;
32use cfgread;
33use colcfg;
34use dbutil;
35use plugin;
36use util;
37
38
39BEGIN {
40 # set autoflush on for STDERR and STDOUT so that mgpp
41 # doesn't get out of sync with plugins
42 STDOUT->autoflush(1);
43 STDERR->autoflush(1);
44}
45
46END {
47 STDOUT->autoflush(0);
48 STDERR->autoflush(0);
49}
50
51our $maxdocsize = 12000;
52
53# used to signify "gs2"(default) or "gs3"
54our $gs_mode = "gs2";
55
56sub new {
57 my ($class, $collection, $source_dir, $build_dir, $verbosity,
58 $maxdocs, $debug, $keepold, $incremental, $incremental_mode,
59 $remove_empty_classifications,
60 $outhandle, $no_text, $failhandle, $gli) = @_;
61
62 $outhandle = *STDERR unless defined $outhandle;
63 $no_text = 0 unless defined $no_text;
64 $failhandle = *STDERR unless defined $failhandle;
65
66 # create a builder object
67 my $self = bless {'collection'=>$collection,
68 'source_dir'=>$source_dir,
69 'build_dir'=>$build_dir,
70 'verbosity'=>$verbosity,
71 'maxdocs'=>$maxdocs,
72 'debug'=>$debug,
73 'keepold'=>$keepold,
74 'incremental'=>$incremental,
75 'incremental_mode'=>$incremental_mode,
76 'remove_empty_classifications'=>$remove_empty_classifications,
77 'outhandle'=>$outhandle,
78 'no_text'=>$no_text,
79 'failhandle'=>$failhandle,
80 'notbuilt'=>{}, # indexes not built
81 'gli'=>$gli
82 }, $class;
83
84 $self->{'gli'} = 0 unless defined $self->{'gli'};
85
86 # Read in the collection configuration file.
87 my ($colcfgname);
88 ($colcfgname, $gs_mode) = &colcfg::get_collect_cfg_name($outhandle);
89 $self->{'collect_cfg'} = &colcfg::read_collection_cfg ($colcfgname, $gs_mode);
90
91 if ($gs_mode eq "gs3") {
92 # read it in again to save the original form for later writing out
93 # of buildConfig.xml
94 # we use this preserve object because $self->{'collect_cfg'}->{'classify'} somewhat gets modified during the calling of &classify::load_classifiers.
95 $self->{'collect_cfg_preserve'} = &colcfg::read_collection_cfg ($colcfgname, $gs_mode);
96 }
97
98 # get the database type for this collection from the collect.cfg file (may be undefined)
99 $self->{'infodbtype'} = $self->{'collect_cfg'}->{'infodbtype'} || &dbutil::get_default_infodb_type();
100
101
102 # load up any dontdb fields
103 $self->{'dontdb'} = {};
104 if (defined ($self->{'collect_cfg'}->{'dontgdbm'})) {
105 foreach my $dg (@{$self->{'collect_cfg'}->{'dontgdbm'}}) {
106 $self->{'dontdb'}->{$dg} = 1;
107 }
108 }
109
110 $self->{'maxnumeric'} = 4;
111 return $self;
112}
113
114# stuff has been moved here from new, so we can use subclass methods
115sub init {
116 my $self = shift(@_);
117
118 my $outhandle = $self->{'outhandle'};
119 my $failhandle = $self->{'failhandle'};
120
121 $self->generate_index_list();
122 my $indexes = $self->{'collect_cfg'}->{'indexes'};
123 if (defined $indexes) {
124 # sort out subcollection indexes
125 if (defined $self->{'collect_cfg'}->{'indexsubcollections'}) {
126 $self->{'collect_cfg'}->{'indexes'} = [];
127 foreach my $subcollection (@{$self->{'collect_cfg'}->{'indexsubcollections'}}) {
128 foreach my $index (@$indexes) {
129 push (@{$self->{'collect_cfg'}->{'indexes'}}, "$index:$subcollection");
130 }
131 }
132 }
133
134 # sort out language subindexes
135 if (defined $self->{'collect_cfg'}->{'languages'}) {
136 $indexes = $self->{'collect_cfg'}->{'indexes'};
137 $self->{'collect_cfg'}->{'indexes'} = [];
138 foreach my $language (@{$self->{'collect_cfg'}->{'languages'}}) {
139 foreach my $index (@$indexes) {
140 if (defined ($self->{'collect_cfg'}->{'indexsubcollections'})) {
141 push (@{$self->{'collect_cfg'}->{'indexes'}}, "$index:$language");
142 }
143 else { # add in an empty subcollection field
144 push (@{$self->{'collect_cfg'}->{'indexes'}}, "$index\:\:$language");
145 }
146 }
147 }
148 }
149 }
150
151 if (defined($self->{'collect_cfg'}->{'indexes'})) {
152 # make sure that the same index isn't specified more than once
153 my %tmphash = ();
154 my @tmparray = @{$self->{'collect_cfg'}->{'indexes'}};
155 $self->{'collect_cfg'}->{'indexes'} = [];
156 foreach my $i (@tmparray) {
157 if (!defined ($tmphash{$i})) {
158 push (@{$self->{'collect_cfg'}->{'indexes'}}, $i);
159 $tmphash{$i} = 1;
160 }
161 }
162 } else {
163 $self->{'collect_cfg'}->{'indexes'} = [];
164 }
165
166 # check incremental against whether builder can cope or not.
167 if ($self->{'incremental'} && !$self->is_incremental_capable()) {
168 print $outhandle "WARNING: The indexer used is not capable of incremental building. Reverting to -removeold\n";
169 $self->{'keepold'} = 0;
170 $self->{'incremental'} = 0;
171 $self->{'incremental_mode'} = "none";
172
173 }
174
175
176 # get the list of plugins for this collection
177 my $plugins = [];
178 if (defined $self->{'collect_cfg'}->{'plugin'}) {
179 $plugins = $self->{'collect_cfg'}->{'plugin'};
180 }
181
182 # load all the plugins
183
184 #build up the extra global options for the plugins
185 my @global_opts = ();
186 if (defined $self->{'collect_cfg'}->{'separate_cjk'} && $self->{'collect_cfg'}->{'separate_cjk'} =~ /^true$/i) {
187 push @global_opts, "-separate_cjk";
188 }
189 $self->{'pluginfo'} = &plugin::load_plugins ($plugins, $self->{'verbosity'}, $outhandle, $failhandle, \@global_opts, $self->{'incremental_mode'});
190
191 if (scalar(@{$self->{'pluginfo'}}) == 0) {
192 print $outhandle "No plugins were loaded.\n";
193 die "\n";
194 }
195
196 # get the list of classifiers for this collection
197 my $classifiers = [];
198 if (defined $self->{'collect_cfg'}->{'classify'}) {
199 $classifiers = $self->{'collect_cfg'}->{'classify'};
200 }
201
202 # load all the classifiers
203 $self->{'classifiers'} = &classify::load_classifiers ($classifiers, $self->{'build_dir'}, $outhandle);
204
205 # load up the document processor for building
206 # if a buildproc class has been created for this collection, use it
207 # otherwise, use the default buildproc for the builder we are initialising
208 my $buildprocdir = undef;
209 my $buildproctype;
210
211 my $collection = $self->{'collection'};
212 if (-e "$ENV{'GSDLCOLLECTDIR'}/custom/${collection}/perllib/custombuildproc.pm") {
213 $buildprocdir = "$ENV{'GSDLCOLLECTDIR'}/custom/${collection}/perllib";
214 $buildproctype = "custombuildproc";
215 } elsif (-e "$ENV{'GSDLCOLLECTDIR'}/perllib/custombuildproc.pm") {
216 $buildprocdir = "$ENV{'GSDLCOLLECTDIR'}/perllib";
217 $buildproctype = "custombuildproc";
218 } elsif (-e "$ENV{'GSDLCOLLECTDIR'}/perllib/${collection}buildproc.pm") {
219 $buildprocdir = "$ENV{'GSDLCOLLECTDIR'}/perllib";
220 $buildproctype = "${collection}buildproc";
221 } else {
222 $buildproctype = $self->default_buildproc();
223 }
224 if (defined $buildprocdir) {
225 require "$buildprocdir/$buildproctype.pm";
226 }
227 else {
228 require "$buildproctype.pm";
229 }
230
231 eval("\$self->{'buildproc'} = new $buildproctype(\$self->{'collection'}, " .
232 "\$self->{'source_dir'}, \$self->{'build_dir'}, \$self->{'keepold'}, \$self->{'verbosity'}, \$self->{'outhandle'})");
233 die "$@" if $@;
234
235 # We call set_infodbtype() now so the buildproc knows the infodbtype for all phases of the build
236 $self->{'buildproc'}->set_infodbtype($self->{'infodbtype'});
237
238 $self->generate_index_options();
239
240 if (!$self->{'debug'} && !$self->{'keepold'}) {
241 # remove any old builds
242 &util::rm_r($self->{'build_dir'});
243 &util::mk_all_dir($self->{'build_dir'});
244
245 # make the text directory
246 my $textdir = "$self->{'build_dir'}/text";
247 &util::mk_all_dir($textdir);
248 }
249
250 if ($self->{'incremental'}) {
251 # some classes may need to do some additional initialisation
252 $self->init_for_incremental_build();
253 }
254
255}
256
257sub is_incremental_capable
258{
259 # By default we return 'no' as the answer
260 # Safer to assume non-incremental to start with, and then override in
261 # inherited classes that are.
262
263 return 0;
264}
265
266# implement this in subclass if want to do additional initialisation for an
267# incremental build
268sub init_for_incremental_build {
269 my $self = shift (@_);
270}
271
272sub deinit {
273 my $self = shift (@_);
274
275 &plugin::deinit($self->{'pluginfo'},$self->{'buildproc'});
276}
277
278sub generate_index_options {
279 my $self = shift (@_);
280
281 my $separate_cjk = 0;
282
283 if (defined($self->{'collect_cfg'}->{'indexoptions'})) {
284 foreach my $option (@{$self->{'collect_cfg'}->{'indexoptions'}}) {
285 if ($option =~ /separate_cjk/) {
286 $separate_cjk = 1;
287 }
288 }
289 }
290 # set this for building
291 $self->{'buildproc'}->set_separate_cjk($separate_cjk);
292 # record it for build.cfg
293 $self->{'separate_cjk'} = $separate_cjk;
294}
295
296sub set_sections_index_document_metadata {
297 my $self = shift (@_);
298 my ($index) = @_;
299
300 $self->{'buildproc'}->set_sections_index_document_metadata($index);
301}
302
303sub set_maxnumeric {
304 my $self = shift (@_);
305 my ($maxnumeric) = @_;
306
307 $self->{'maxnumeric'} = $maxnumeric;
308}
309sub set_strip_html {
310 my $self = shift (@_);
311 my ($strip) = @_;
312
313 $self->{'strip_html'} = $strip;
314 $self->{'buildproc'}->set_strip_html($strip);
315}
316
317sub compress_text {
318 my $self = shift (@_);
319 my ($textindex) = @_;
320
321 print STDERR "compress_text() should be implemented in subclass!!";
322 return;
323}
324
325
326sub build_indexes {
327 my $self = shift (@_);
328 my ($indexname) = @_;
329 my $outhandle = $self->{'outhandle'};
330
331 my $indexes = [];
332 if (defined $indexname && $indexname =~ /\w/) {
333 push @$indexes, $indexname;
334 } else {
335 $indexes = $self->{'collect_cfg'}->{'indexes'};
336 }
337
338 # create the mapping between the index descriptions
339 # and their directory names (includes subcolls and langs)
340 $self->{'index_mapping'} = $self->create_index_mapping ($indexes);
341
342 # build each of the indexes
343 foreach my $index (@$indexes) {
344 if ($self->want_built($index)) {
345 print $outhandle "\n*** building index $index in subdirectory " .
346 "$self->{'index_mapping'}->{$index}\n" if ($self->{'verbosity'} >= 1);
347 print STDERR "<Stage name='Index' source='$index'>\n" if $self->{'gli'};
348 $self->build_index($index);
349 } else {
350 print $outhandle "\n*** ignoring index $index\n" if ($self->{'verbosity'} >= 1);
351 }
352 }
353
354 $self->build_indexes_extra();
355
356}
357
358# implement this in subclass if want to do extra stuff at the end of building
359# all the indexes
360sub build_indexes_extra {
361 my $self = shift(@_);
362
363}
364
365sub build_index {
366 my $self = shift (@_);
367 my ($index) = @_;
368
369 print STDERR "build_index should be implemented in subclass\n";
370 return;
371}
372
373
374
375sub make_infodatabase {
376 my $self = shift (@_);
377 my $outhandle = $self->{'outhandle'};
378
379 print STDERR "BuildDir: $self->{'build_dir'}\n";
380
381 my $textdir = &util::filename_cat($self->{'build_dir'}, "text");
382 my $assocdir = &util::filename_cat($self->{'build_dir'}, "assoc");
383 &util::mk_all_dir ($textdir);
384 &util::mk_all_dir ($assocdir);
385
386 # Get info database file path
387 my $infodb_type = $self->{'infodbtype'};
388 my $infodb_file_path = &dbutil::get_infodb_file_path($infodb_type, $self->{'collection'}, $textdir);
389
390 print $outhandle "\n*** creating the info database and processing associated files\n"
391 if ($self->{'verbosity'} >= 1);
392 print STDERR "<Stage name='CreateInfoData'>\n" if $self->{'gli'};
393
394 # init all the classifiers
395 &classify::init_classifiers ($self->{'classifiers'});
396
397 my $reconstructed_docs = undef;
398 my $database_recs = undef;
399
400 if ($self->{'incremental'}) {
401 $database_recs = {};
402
403 &dbutil::read_infodb_file($infodb_type, $infodb_file_path, $database_recs);
404 }
405
406
407 # Important (for memory usage reasons) that we obtain the filehandle
408 # here for writing out to the database, rather than after
409 # $reconstructed_docs has been set up (assuming -incremental is on)
410 #
411 # This is because when we open a pipe to txt2db [using open()]
412 # this triggers a fork() followed by exec(). $reconstructed_docs
413 # can get very large, and so if we did the open() after this, it means
414 # the fork creates a clone of the *large* process image which (admittedly)
415 # is then quickly replaced in the execve() with the much smaller image for
416 # 'txt2db'. The trouble is, in that seismic second caused by
417 # the fork(), the system really does need to have all that memory available
418 # even though it isn't ultimately used. The result is an out of memory
419 # error.
420
421 my ($infodb_handle);
422 if ($self->{'debug'}) {
423 $infodb_handle = *STDOUT;
424 }
425 else {
426 $infodb_handle = &dbutil::open_infodb_write_handle($infodb_type, $infodb_file_path);
427 if (!defined($infodb_handle))
428 {
429 print STDERR "<FatalError name='NoRunText2DB'/>\n</Stage>\n" if $self->{'gli'};
430 die "builder::make_infodatabase - couldn't open infodb write handle\n";
431 }
432 }
433
434 if ($self->{'incremental'}) {
435 # reconstruct doc_obj metadata from database for all docs
436 $reconstructed_docs
437 = &classify::reconstruct_doc_objs_metadata($infodb_type,
438 $infodb_file_path,
439 $database_recs);
440 }
441
442 # set up the document processor
443
444 $self->{'buildproc'}->set_output_handle ($infodb_handle);
445 $self->{'buildproc'}->set_mode ('infodb');
446 $self->{'buildproc'}->set_assocdir ($assocdir);
447 $self->{'buildproc'}->set_dontdb ($self->{'dontdb'});
448 $self->{'buildproc'}->set_classifiers ($self->{'classifiers'});
449 $self->{'buildproc'}->set_indexing_text (0);
450 $self->{'buildproc'}->set_store_text(1);
451 $self->{'buildproc'}->set_store_metadata_coverage ($self->{'collect_cfg'}->{'store_metadata_coverage'});
452
453 # make_infodatabase needs full reset even for incremental build
454 # as incremental works by reconstructing all docs from the database and
455 # then adding in the new ones
456 $self->{'buildproc'}->zero_reset();
457
458 $self->{'buildproc'}->{'mdprefix_fields'} = {};
459
460 &plugin::read ($self->{'pluginfo'}, $self->{'source_dir'},
461 "", {}, {}, $self->{'buildproc'}, $self->{'maxdocs'},0, $self->{'gli'});
462
463 if ($self->{'incremental'}) {
464 # create flat classify structure, ready for new docs to be added
465 foreach my $doc_obj ( @$reconstructed_docs ) {
466 if (! defined $self->{'buildproc'}->{'dont_process_reconstructed'}->{$doc_obj->get_OID()}) {
467 print $outhandle " Adding reconstructed ", $doc_obj->get_OID(), " into classify structures\n";
468 $self->{'buildproc'}->process($doc_obj,undef);
469 }
470 }
471 }
472 # this has changed to only output collection meta if its
473 # not in the config file
474 $self->output_collection_meta($infodb_handle);
475
476 # output classification information
477 &classify::output_classify_info ($self->{'classifiers'}, $infodb_type, $infodb_handle,
478 $self->{'remove_empty_classifications'},
479 $self->{'gli'});
480
481 # Output classifier reverse lookup, used in incremental deletion
482 ####&classify::print_reverse_lookup($infodb_handle);
483
484 # output doclist
485 my @doc_list = $self->{'buildproc'}->get_doc_list();
486 my $browselist_infodb = { 'hastxt' => [ "0" ],
487 'childtype' => [ "VList" ],
488 'numleafdocs' => [ scalar(@doc_list) ],
489 'thistype' => [ "Invisible" ],
490 'contains' => [ join(";", @doc_list) ] };
491 &dbutil::write_infodb_entry($infodb_type, $infodb_handle, "browselist", $browselist_infodb);
492
493 &dbutil::close_infodb_write_handle($infodb_type, $infodb_handle) if !$self->{'debug'};
494
495 if ($infodb_type eq "gdbm-txtgz") {
496 my $gdb_infodb_file_path = &dbutil::get_infodb_file_path("gdbm", $self->{'collection'}, $textdir);
497 if (-e $gdb_infodb_file_path) {
498 &util::rm($gdb_infodb_file_path);
499 }
500 }
501 print STDERR "</Stage>\n" if $self->{'gli'};
502}
503
504sub make_auxiliary_files {
505 my $self = shift (@_);
506 my ($index);
507 my $build_cfg = {};
508 # subclasses may have already defined stuff in here
509 if (defined $self->{'build_cfg'}) {
510 $build_cfg = $self->{'build_cfg'};
511 }
512
513 my $outhandle = $self->{'outhandle'};
514
515 print $outhandle "\n*** creating auxiliary files \n" if ($self->{'verbosity'} >= 1);
516 print STDERR "<Stage name='CreatingAuxilary'>\n" if $self->{'gli'};
517
518 # get the text directory
519 &util::mk_all_dir ($self->{'build_dir'});
520
521 # store the build date
522 $build_cfg->{'builddate'} = time;
523 $build_cfg->{'buildtype'} = $self->{'buildtype'};
524 $build_cfg->{'indexstem'} = &util::get_dirsep_tail($self->{'collection'});
525 $build_cfg->{'stemindexes'} = $self->{'stemindexes'};
526 if ($self->{'separate_cjk'}) {
527 $build_cfg->{'separate_cjk'} = "true";
528 }
529
530 # store the number of documents and number of bytes
531 $build_cfg->{'numdocs'} = $self->{'buildproc'}->get_num_docs();
532 $build_cfg->{'numsections'} = $self->{'buildproc'}->get_num_sections();
533 $build_cfg->{'numbytes'} = $self->{'buildproc'}->get_num_bytes();
534
535 # store the mapping between the index names and the directory names
536 # the index map is used to determine what indexes there are, so any that are not built should not be put into the map.
537 my @indexmap = ();
538 foreach my $index (@{$self->{'index_mapping'}->{'indexmaporder'}}) {
539 if (not defined ($self->{'notbuilt'}->{$index})) {
540 push (@indexmap, "$index\-\>$self->{'index_mapping'}->{'indexmap'}->{$index}");
541 }
542 }
543 $build_cfg->{'indexmap'} = \@indexmap if scalar (@indexmap);
544
545 my @subcollectionmap = ();
546 foreach my $subcollection (@{$self->{'index_mapping'}->{'subcollectionmaporder'}}) {
547 push (@subcollectionmap, "$subcollection\-\>" .
548 $self->{'index_mapping'}->{'subcollectionmap'}->{$subcollection});
549 }
550 $build_cfg->{'subcollectionmap'} = \@subcollectionmap if scalar (@subcollectionmap);
551
552 my @languagemap = ();
553 foreach my $language (@{$self->{'index_mapping'}->{'languagemaporder'}}) {
554 push (@languagemap, "$language\-\>" .
555 $self->{'index_mapping'}->{'languagemap'}->{$language});
556 }
557 $build_cfg->{'languagemap'} = \@languagemap if scalar (@languagemap);
558
559 my @notbuilt = ();
560 foreach my $nb (keys %{$self->{'notbuilt'}}) {
561 push (@notbuilt, $nb);
562 }
563 $build_cfg->{'notbuilt'} = \@notbuilt if scalar (@notbuilt);
564
565 $build_cfg->{'maxnumeric'} = $self->{'maxnumeric'};
566
567 $build_cfg->{'infodbtype'} = $self->{'infodbtype'};
568
569 # write out the earliestDatestamp information needed for OAI
570 my $archivedir = &util::filename_cat ($ENV{'GSDLCOLLECTDIR'}, "archives");
571 if(!-d $archivedir) {
572 $archivedir = &util::filename_cat ($ENV{'GSDLCOLLECTDIR'}, "export");
573 }
574 my $earliestDatestampFile = &util::filename_cat ($archivedir, "earliestDatestamp");
575 my $earliestDatestamp = 0;
576 if (open(FIN,"<$earliestDatestampFile")) {
577 {
578 # slurp in file as a single line
579 local $/ = undef;
580 $earliestDatestamp = <FIN>;
581 #&unicode::ensure_utf8(\$earliestDatestamp); # turn any high bytes that aren't valid utf-8 into utf-8.
582 }
583 close(FIN);
584 }
585 else {
586 print $outhandle "Warning: unable to read collection's earliestDatestamp from $earliestDatestampFile.\n";
587 print $outhandle "Setting value to 0.\n";
588 }
589 $build_cfg->{'earliestdatestamp'} = $earliestDatestamp;
590
591 $self->build_cfg_extra($build_cfg);
592
593 if ($gs_mode eq "gs2") {
594 &colcfg::write_build_cfg(&util::filename_cat($self->{'build_dir'},"build.cfg"), $build_cfg);
595 }
596 if ($gs_mode eq "gs3") {
597
598 &colcfg::write_build_cfg_xml(&util::filename_cat($self->{'build_dir'}, "buildConfig.xml"), $build_cfg, $self->{'collect_cfg_preserve'});
599 }
600
601 print STDERR "</Stage>\n" if $self->{'gli'};
602}
603
604# implement this in subclass if want to add extra stuff to build.cfg
605sub build_cfg_extra {
606 my $self = shift(@_);
607 my ($build_cfg) = @_;
608
609}
610
611
612sub collect_specific {
613 my $self = shift (@_);
614}
615
616sub want_built {
617 my $self = shift (@_);
618 my ($index) = @_;
619
620 if (defined ($self->{'collect_cfg'}->{'dontbuild'})) {
621 foreach my $checkstr (@{$self->{'collect_cfg'}->{'dontbuild'}}) {
622 if ($index =~ /^$checkstr$/) {
623 $self->{'notbuilt'}->{$index} = 1;
624 return 0;
625 }
626 }
627 }
628
629 return 1;
630}
631
632sub create_index_mapping {
633 my $self = shift (@_);
634 my ($indexes) = @_;
635
636 print STDERR "create_index_mapping should be implemented in subclass\n";
637 my %mapping = ();
638 return \%mapping;
639}
640
641# returns a processed version of a field.
642# if the field has only one component the processed
643# version will contain the first character and next consonant
644# of that componant - otherwise it will contain the first
645# character of the first two components
646# only uses letdig (\w) characters now
647sub process_field {
648 my $self = shift (@_);
649 my ($field) = @_;
650
651 return "" unless (defined ($field) && $field =~ /\S/);
652
653 my ($a, $b);
654 my @components = split /,/, $field;
655 if (scalar @components >= 2) {
656 # pick the first letdig from the first two field names
657 ($a) = $components[0] =~ /^[^\w]*(\w)/;
658 ($b) = $components[1] =~ /^[^\w]*(\w)/;
659 } else {
660 # pick the first two letdig chars
661 ($a, $b) = $field =~ /^[^\w]*(\w)[^\w]*?(\w)/i;
662 }
663 # there may not have been any letdigs...
664 $a = 'a' unless defined $a;
665 $b = '0' unless defined $b;
666
667 my $newfield = "$a$b";
668 if ($newfield =~ /^\d\d$/) {
669 # digits only - Greenstone runtime doesn't like this.
670 $newfield = "a$a";
671 }
672 return $newfield;
673
674}
675
676sub get_next_version {
677 my $self = shift (@_);
678 my ($nameref) = @_;
679 my $num=0;
680 if ($$nameref =~ /(\d\d)$/) {
681 $num = $1; $num ++;
682 $$nameref =~ s/\d\d$/$num/;
683 } elsif ($$nameref =~ /(\d)$/) {
684 $num = $1;
685 if ($num == 9) {$$nameref =~ s/\d$/10/;}
686 else {$num ++; $$nameref =~ s/\d$/$num/;}
687 } else {
688 $$nameref =~ s/.$/0/;
689 }
690}
691
692
693
694sub get_collection_meta_sets
695{
696 my $self = shift(@_);
697 my $collection_infodb = shift(@_);
698
699 my $mdprefix_fields = $self->{'buildproc'}->{'mdprefix_fields'};
700 foreach my $prefix (keys %$mdprefix_fields)
701 {
702 push(@{$collection_infodb->{"metadataset"}}, $prefix);
703
704 foreach my $field (keys %{$mdprefix_fields->{$prefix}})
705 {
706 push(@{$collection_infodb->{"metadatalist-$prefix"}}, $field);
707
708 my $val = $mdprefix_fields->{$prefix}->{$field};
709 push(@{$collection_infodb->{"metadatafreq-$prefix-$field"}}, $val);
710 }
711 }
712}
713
714
715# default is to output the metadata sets (prefixes) used in collection
716sub output_collection_meta
717{
718 my $self = shift(@_);
719 my $infodb_handle = shift(@_);
720
721 my %collection_infodb = ();
722 $self->get_collection_meta_sets(\%collection_infodb);
723 &dbutil::write_infodb_entry($self->{'infodbtype'}, $infodb_handle, "collection", \%collection_infodb);
724}
725
726# sometimes we need to read in an existing build.cfg - for example,
727# if doing each stage of building separately, or when doing incremental
728# building
729sub read_build_cfg {
730 my $self = shift(@_);
731
732 my $buildconfigfilename;
733
734 if ($gs_mode eq "gs2") {
735 $buildconfigfilename = "build.cfg";
736 } else {
737 $buildconfigfilename = "buildConfig.xml";
738 }
739
740 my $buildconfigfile = &util::filename_cat($self->{'build_dir'}, $buildconfigfilename);
741
742 if (!-e $buildconfigfile) {
743 # try the index dir - but do we know where it is?? try here
744 $buildconfigfile = &util::filename_cat($ENV{'GSDLCOLLECTDIR'}, "index", $buildconfigfilename);
745 if (!-e $buildconfigfile) {
746 #we cant find a config file - just ignore the field list
747 return undef;
748 }
749 }
750 return &colcfg::read_building_cfg( $buildconfigfile, $gs_mode);
751
752}
753
754sub print_stats {
755 my $self = shift (@_);
756
757 my $outhandle = $self->{'outhandle'};
758 my $indexing_text = $self->{'buildproc'}->get_indexing_text();
759 my $index = $self->{'buildproc'}->get_index();
760 my $num_bytes = $self->{'buildproc'}->get_num_bytes();
761 my $num_processed_bytes = $self->{'buildproc'}->get_num_processed_bytes();
762
763 if ($indexing_text) {
764 print $outhandle "Stats (Creating index $index)\n";
765 } else {
766 print $outhandle "Stats (Compressing text from $index)\n";
767 }
768 print $outhandle "Total bytes in collection: $num_bytes\n";
769 print $outhandle "Total bytes in $index: $num_processed_bytes\n";
770
771 if ($num_processed_bytes < 50 && ($indexing_text || !$self->{'no_text'})) {
772
773 if ($self->{'incremental'}) {
774 if ($num_processed_bytes == 0) {
775 if ($indexing_text) {
776 print $outhandle "No additional text was added to $index\n";
777 } elsif (!$self->{'no_text'}) {
778 print $outhandle "No additional text was compressed\n";
779 }
780 }
781 }
782 else {
783 print $outhandle "***************\n";
784 if ($indexing_text) {
785 print $outhandle "WARNING: There is very little or no text to process for $index\n";
786 } elsif (!$self->{'no_text'}) {
787 print $outhandle "WARNING: There is very little or no text to compress\n";
788 }
789 print $outhandle " Was this your intention?\n";
790 print $outhandle "***************\n";
791 }
792
793 }
794
795}
796
797
7981;
799
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