[4726] | 1 | ###########################################################################
|
---|
| 2 | #
|
---|
| 3 | # OAIPlug.pm -- basic Open Archives Initiative (OAI) plugin
|
---|
| 4 | #
|
---|
| 5 | # A component of the Greenstone digital library software
|
---|
| 6 | # from the New Zealand Digital Library Project at the
|
---|
| 7 | # University of Waikato, New Zealand.
|
---|
| 8 | #
|
---|
| 9 | # Copyright (C) 1999 New Zealand Digital Library Project
|
---|
| 10 | #
|
---|
| 11 | # This program is free software; you can redistribute it and/or modify
|
---|
| 12 | # it under the terms of the GNU General Public License as published by
|
---|
| 13 | # the Free Software Foundation; either version 2 of the License, or
|
---|
| 14 | # (at your option) any later version.
|
---|
| 15 | #
|
---|
| 16 | # This program is distributed in the hope that it will be useful,
|
---|
| 17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
| 18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
| 19 | # GNU General Public License for more details.
|
---|
| 20 | #
|
---|
| 21 | # You should have received a copy of the GNU General Public License
|
---|
| 22 | # along with this program; if not, write to the Free Software
|
---|
| 23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
---|
| 24 | #
|
---|
| 25 | ###########################################################################
|
---|
| 26 |
|
---|
[15872] | 27 | package OAIPlugin;
|
---|
[4726] | 28 |
|
---|
| 29 | use unicode;
|
---|
| 30 | use util;
|
---|
| 31 |
|
---|
[10254] | 32 | use strict;
|
---|
| 33 | no strict 'refs'; # allow filehandles to be variables and viceversa
|
---|
| 34 |
|
---|
[15872] | 35 | use ReadXMLFile;
|
---|
[17066] | 36 | use ReadTextFile; # needed for subroutine textcat_get_language_encoding
|
---|
[17216] | 37 | use metadatautil;
|
---|
[9958] | 38 |
|
---|
[4726] | 39 | sub BEGIN {
|
---|
[17066] | 40 | @OAIPlugin::ISA = ('ReadXMLFile', 'ReadTextFile');
|
---|
[4726] | 41 | }
|
---|
| 42 |
|
---|
[9958] | 43 |
|
---|
[6408] | 44 | my $arguments =
|
---|
| 45 | [ { 'name' => "process_exp",
|
---|
[16013] | 46 | 'desc' => "{BasePlugin.process_exp}",
|
---|
[6408] | 47 | 'type' => "regexp",
|
---|
| 48 | 'reqd' => "no",
|
---|
[17290] | 49 | 'deft' => &get_default_process_exp() },
|
---|
[17319] | 50 | { 'name' => "document_field",
|
---|
| 51 | 'desc' => "{OAIPlugin.document_field}",
|
---|
[17290] | 52 | 'type' => "metadata",
|
---|
| 53 | 'reqd' => "no",
|
---|
| 54 | 'deft' => "gi.Sourcedoc" }
|
---|
[6408] | 55 | ];
|
---|
| 56 |
|
---|
[15872] | 57 | my $options = { 'name' => "OAIPlugin",
|
---|
| 58 | 'desc' => "{OAIPlugin.desc}",
|
---|
[6408] | 59 | 'abstract' => "no",
|
---|
| 60 | 'inherits' => "yes",
|
---|
[17103] | 61 | 'explodes' => "yes",
|
---|
[6408] | 62 | 'args' => $arguments };
|
---|
[4747] | 63 |
|
---|
[10254] | 64 |
|
---|
[4726] | 65 | sub new {
|
---|
[10218] | 66 | my ($class) = shift (@_);
|
---|
| 67 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
|
---|
| 68 | push(@$pluginlist, $class);
|
---|
[4873] | 69 |
|
---|
[15872] | 70 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
|
---|
| 71 | push(@{$hashArgOptLists->{"OptList"}},$options);
|
---|
[4726] | 72 |
|
---|
[17126] | 73 | new ReadTextFile($pluginlist, $inputargs, $hashArgOptLists,1);
|
---|
[15872] | 74 | my $self = new ReadXMLFile($pluginlist, $inputargs, $hashArgOptLists);
|
---|
[4726] | 75 |
|
---|
| 76 | return bless $self, $class;
|
---|
| 77 | }
|
---|
| 78 |
|
---|
| 79 | sub get_default_process_exp {
|
---|
| 80 | my $self = shift (@_);
|
---|
| 81 |
|
---|
| 82 | return q^(?i)(\.oai)$^;
|
---|
| 83 | }
|
---|
| 84 |
|
---|
[13222] | 85 | sub get_doctype {
|
---|
| 86 | my $self = shift(@_);
|
---|
| 87 |
|
---|
| 88 | return "OAI-PMH";
|
---|
| 89 | }
|
---|
| 90 |
|
---|
[9958] | 91 | sub xml_start_document {
|
---|
[10254] | 92 | my $self = shift (@_);
|
---|
[9958] | 93 | $self->{'in_metadata_node'} = 0;
|
---|
| 94 | $self->{'rawxml'} = "";
|
---|
[17290] | 95 | $self->{'saved_metadata'} = {};
|
---|
[9958] | 96 | }
|
---|
[4726] | 97 |
|
---|
[9958] | 98 | sub xml_end_document {
|
---|
| 99 | }
|
---|
[4726] | 100 |
|
---|
[9958] | 101 | sub xml_doctype {
|
---|
| 102 | my $self = shift(@_);
|
---|
| 103 |
|
---|
| 104 | my ($expat, $name, $sysid, $pubid, $internal) = @_;
|
---|
| 105 |
|
---|
[13886] | 106 | ##die "" if ($name !~ /^OAI-PMH$/);
|
---|
[9958] | 107 |
|
---|
[4726] | 108 | my $outhandle = $self->{'outhandle'};
|
---|
[15872] | 109 | print $outhandle "OAIPlugin: processing $self->{'file'}\n" if $self->{'verbosity'} > 1;
|
---|
| 110 | print STDERR "<Processing n='$self->{'file'}' p='OAIPlugin'>\n" if $self->{'gli'};
|
---|
[4726] | 111 |
|
---|
[9958] | 112 | }
|
---|
[4726] | 113 |
|
---|
[9958] | 114 |
|
---|
| 115 | sub xml_start_tag {
|
---|
| 116 | my $self = shift(@_);
|
---|
| 117 | my ($expat,$element) = @_;
|
---|
| 118 |
|
---|
| 119 | my %attr_hash = %_;
|
---|
| 120 |
|
---|
| 121 | my $attr = "";
|
---|
| 122 | map { $attr .= " $_=$attr_hash{$_}"; } keys %attr_hash;
|
---|
| 123 |
|
---|
| 124 | $self->{'rawxml'} .= "<$element$attr>";
|
---|
| 125 |
|
---|
| 126 | if ($element eq "metadata") {
|
---|
| 127 | $self->{'in_metadata_node'} = 1;
|
---|
| 128 | $self->{'metadata_xml'} = "";
|
---|
[4726] | 129 | }
|
---|
[9958] | 130 |
|
---|
| 131 | if ($self->{'in_metadata_node'}) {
|
---|
| 132 | $self->{'metadata_xml'} .= "<$element$attr>";
|
---|
[4726] | 133 | }
|
---|
[9958] | 134 | }
|
---|
[4726] | 135 |
|
---|
[9958] | 136 | sub xml_end_tag {
|
---|
| 137 | my $self = shift(@_);
|
---|
| 138 | my ($expat, $element) = @_;
|
---|
[4726] | 139 |
|
---|
[9958] | 140 | $self->{'rawxml'} .= "</$element>";
|
---|
[4726] | 141 |
|
---|
[9958] | 142 | if ($self->{'in_metadata_node'}) {
|
---|
| 143 | $self->{'metadata_xml'} .= "</$element>";
|
---|
[4726] | 144 | }
|
---|
| 145 |
|
---|
[9958] | 146 | if ($element eq "metadata") {
|
---|
| 147 | my $textref = \$self->{'metadata_xml'};
|
---|
[17290] | 148 | #my $metadata = $self->{'metadata'};
|
---|
| 149 | my $metadata = $self->{'saved_metadata'};
|
---|
[9958] | 150 | $self->extract_oai_metadata($textref,$metadata);
|
---|
[4726] | 151 |
|
---|
[9958] | 152 | $self->{'in_metadata_node'} = 0;
|
---|
| 153 | }
|
---|
[4726] | 154 |
|
---|
| 155 |
|
---|
[9958] | 156 | }
|
---|
[4726] | 157 |
|
---|
[9958] | 158 | sub xml_text {
|
---|
| 159 | my $self = shift(@_);
|
---|
| 160 | my ($expat) = @_;
|
---|
[8684] | 161 |
|
---|
[9958] | 162 | $self->{'rawxml'} .= $_;
|
---|
[4726] | 163 |
|
---|
[9958] | 164 | if ($self->{'in_metadata_node'}) {
|
---|
| 165 | $self->{'metadata_xml'} .= $_;
|
---|
[4726] | 166 | }
|
---|
[9958] | 167 | }
|
---|
[4726] | 168 |
|
---|
[8121] | 169 |
|
---|
[17216] | 170 | sub metadata_read {
|
---|
| 171 | my $self = shift (@_);
|
---|
[4726] | 172 |
|
---|
[17300] | 173 | my ($pluginfo, $base_dir, $file, $block_hash, $extrametakeys, $extrametadata, $processor, $maxdocs, $gli) = @_;
|
---|
[5919] | 174 |
|
---|
[17216] | 175 | # can we process this file??
|
---|
| 176 | my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
|
---|
| 177 | return undef unless $self->can_process_this_file($filename_full_path);
|
---|
| 178 |
|
---|
[17290] | 179 | if (!$self->parse_file($filename_full_path, $file, $gli)) {
|
---|
| 180 | $self->{'saved_metadata'} = undef;
|
---|
| 181 | return undef;
|
---|
| 182 | }
|
---|
| 183 |
|
---|
| 184 | my $new_metadata = $self->{'saved_metadata'};
|
---|
| 185 | $self->{'saved_metadata'} = undef;
|
---|
[17319] | 186 |
|
---|
[17290] | 187 | # add the pretty metadata table as metadata
|
---|
| 188 | my $ppmd_table = $self->{'ppmd_table'};
|
---|
| 189 | $new_metadata->{'prettymd'} = $ppmd_table;
|
---|
| 190 | $self->{'ppmd_table'} = undef;
|
---|
[17319] | 191 |
|
---|
| 192 | my $document_metadata_field = $self->{'document_field'};
|
---|
| 193 | my $url_array = $new_metadata->{$document_metadata_field};
|
---|
[17290] | 194 | my $num_urls = (defined $url_array) ? scalar(@$url_array) : 0;
|
---|
[17319] | 195 | ##print STDERR "$num_urls urls for $file\n";
|
---|
[17290] | 196 | my $srcdoc_exists = 0;
|
---|
| 197 | my $srcdoc_pos = 0;
|
---|
| 198 | my $filename_dir = &util::filename_head($filename_full_path);
|
---|
[17319] | 199 | my $filename_for_metadata = $file; # this assumes there will only be one record per oai file - is this always the case??
|
---|
[17290] | 200 | for (my $i=0; $i<$num_urls; $i++) {
|
---|
[17216] | 201 |
|
---|
[17290] | 202 | if ($url_array->[$i] !~ m/^(https?|ftp):/) {
|
---|
[17216] | 203 |
|
---|
[17290] | 204 | my $src_filename = &util::filename_cat($filename_dir, $url_array->[$i]);
|
---|
[17216] | 205 |
|
---|
[17290] | 206 | if (-e $src_filename) {
|
---|
| 207 | $srcdoc_pos = $i;
|
---|
| 208 | $srcdoc_exists = 1;
|
---|
| 209 | $filename_for_metadata = $url_array->[$i];
|
---|
| 210 | last;
|
---|
[17216] | 211 | }
|
---|
| 212 | }
|
---|
| 213 | }
|
---|
[17290] | 214 |
|
---|
[17319] | 215 | if ($srcdoc_exists) {
|
---|
[17290] | 216 | $self->{'oai-files'}->{$file}->{'srcdoc_exists'} = 1;
|
---|
| 217 | }
|
---|
[17216] | 218 | else {
|
---|
[17290] | 219 | # save the rawxml for the source document
|
---|
| 220 | $self->{'oai-files'}->{$file}->{'srcdoc_exists'} = 0;
|
---|
| 221 | $self->{'oai-files'}->{$file}->{'rawxml'} = $self->{'rawxml'};
|
---|
| 222 | $self->{'rawxml'} = "";
|
---|
[17216] | 223 | }
|
---|
[17290] | 224 |
|
---|
| 225 | # return all the metadata we have extracted to the caller.
|
---|
| 226 | # Directory plug will pass it back in at read time, so we don't need to extract it again.
|
---|
| 227 | $extrametadata->{$filename_for_metadata} = $new_metadata;
|
---|
| 228 | push(@$extrametakeys, $filename_for_metadata);
|
---|
| 229 |
|
---|
| 230 | return 1;
|
---|
| 231 |
|
---|
[17216] | 232 | }
|
---|
| 233 |
|
---|
| 234 |
|
---|
[9958] | 235 | sub read {
|
---|
| 236 | my $self = shift (@_);
|
---|
[17290] | 237 |
|
---|
[16392] | 238 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
|
---|
[4726] | 239 |
|
---|
[17290] | 240 | if (!defined $self->{'oai-files'}->{$file}) {
|
---|
| 241 | return undef;
|
---|
| 242 | }
|
---|
[17319] | 243 |
|
---|
[17290] | 244 | my $srcdoc_exists = $self->{'oai-files'}->{$file}->{'srcdoc_exists'};
|
---|
| 245 | if ($srcdoc_exists) {
|
---|
[17319] | 246 | # do nothing more - all the metadata has been extracted and associated with the srcdoc
|
---|
[17216] | 247 | # no more need to access details of this $file => tidy up as you go
|
---|
| 248 | delete $self->{'oai-files'}->{$file};
|
---|
[17290] | 249 | return 0; # not processed here, but don't pass on to rest of plugins
|
---|
| 250 | }
|
---|
[17216] | 251 |
|
---|
[17290] | 252 | my $filename = $file;
|
---|
| 253 | $filename = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
|
---|
[17216] | 254 |
|
---|
[17290] | 255 | # Do encoding stuff on metadata
|
---|
| 256 | my ($language, $encoding) = $self->textcat_get_language_encoding ($filename);
|
---|
[17216] | 257 |
|
---|
[17290] | 258 | # create a new document
|
---|
| 259 | my $doc_obj = new doc ($filename, "indexed_doc");
|
---|
| 260 | my $top_section = $doc_obj->get_top_section;
|
---|
| 261 | my $plugin_type = $self->{'plugin_type'};
|
---|
| 262 |
|
---|
| 263 | $doc_obj->add_utf8_metadata($top_section, "Language", $language);
|
---|
| 264 | $doc_obj->add_utf8_metadata($top_section, "Encoding", $encoding);
|
---|
| 265 | $doc_obj->add_utf8_metadata($top_section, "Plugin", $plugin_type);
|
---|
| 266 | $doc_obj->add_metadata($top_section, "FileFormat", "OAI");
|
---|
| 267 | $doc_obj->add_metadata($top_section, "FileSize", (-s $filename));
|
---|
| 268 |
|
---|
| 269 | # include any metadata passed in from previous plugins
|
---|
| 270 | # note that this metadata is associated with the top level section
|
---|
[17319] | 271 | # this will include all the metadata from the oai file that we extracted
|
---|
| 272 | # during metadata_read
|
---|
[17290] | 273 | $self->extra_metadata ($doc_obj, $doc_obj->get_top_section(), $metadata);
|
---|
| 274 |
|
---|
| 275 | # do plugin specific processing of doc_obj
|
---|
| 276 | my $text = $self->{'oai-files'}->{$file}->{'rawxml'};
|
---|
| 277 | delete $self->{'oai-files'}->{$file};
|
---|
[17216] | 278 |
|
---|
[17290] | 279 | unless (defined ($self->process(\$text, $pluginfo, $base_dir, $file, $metadata, $doc_obj))) {
|
---|
| 280 | print STDERR "<ProcessingError n='$file'>\n" if ($gli);
|
---|
| 281 | return -1;
|
---|
[17216] | 282 | }
|
---|
[17290] | 283 |
|
---|
| 284 | # do any automatic metadata extraction
|
---|
| 285 | $self->auto_extract_metadata ($doc_obj);
|
---|
| 286 |
|
---|
| 287 | # add an OID
|
---|
| 288 | $self->add_OID($doc_obj);
|
---|
| 289 |
|
---|
| 290 | # process the document
|
---|
| 291 | $processor->process($doc_obj);
|
---|
| 292 |
|
---|
| 293 | $self->{'num_processed'} ++;
|
---|
| 294 |
|
---|
| 295 | return 1; # processed the file
|
---|
[17216] | 296 | }
|
---|
| 297 |
|
---|
| 298 |
|
---|
[4726] | 299 | # do plugin specific processing of doc_obj
|
---|
| 300 | sub process {
|
---|
| 301 | my $self = shift (@_);
|
---|
[6332] | 302 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
|
---|
[4726] | 303 | my $outhandle = $self->{'outhandle'};
|
---|
| 304 |
|
---|
[15872] | 305 | print STDERR "<Processing n='$file' p='OAIPlugin'>\n" if ($gli);
|
---|
| 306 | print $outhandle "OAIPlugin: processing $file\n"
|
---|
[4726] | 307 | if $self->{'verbosity'} > 1;
|
---|
| 308 |
|
---|
| 309 | my $cursection = $doc_obj->get_top_section();
|
---|
| 310 |
|
---|
| 311 | ## $self->extract_metadata ($textref, $metadata, $doc_obj, $cursection);
|
---|
| 312 |
|
---|
| 313 | # add text to document object
|
---|
| 314 |
|
---|
| 315 | # $$textref =~ s/<(.*?)>/$1 /g;
|
---|
| 316 | $$textref =~ s/</</g;
|
---|
| 317 | $$textref =~ s/>/>/g;
|
---|
[14963] | 318 | $$textref =~ s/\[/[/g;
|
---|
| 319 | $$textref =~ s/\]/]/g;
|
---|
[4726] | 320 |
|
---|
| 321 | $doc_obj->add_utf8_text($cursection, $$textref);
|
---|
| 322 |
|
---|
| 323 | return 1;
|
---|
| 324 | }
|
---|
| 325 |
|
---|
| 326 |
|
---|
[9958] | 327 | # Improvement is to merge this with newer version in MetadataPass
|
---|
[4726] | 328 |
|
---|
[9958] | 329 | sub open_prettyprint_metadata_table
|
---|
| 330 | {
|
---|
| 331 | my $self = shift(@_);
|
---|
| 332 |
|
---|
| 333 | my $att = "width=100% cellspacing=2";
|
---|
| 334 | my $style = "style=\'border-bottom: 4px solid #000080\'";
|
---|
| 335 |
|
---|
[17290] | 336 | $self->{'ppmd_table'} = "\n<table $att $style>";
|
---|
[9958] | 337 | }
|
---|
| 338 |
|
---|
| 339 | sub add_prettyprint_metadata_line
|
---|
| 340 | {
|
---|
| 341 | my $self = shift(@_);
|
---|
| 342 | my ($metaname, $metavalue_utf8) = @_;
|
---|
| 343 |
|
---|
| 344 | $metavalue_utf8 = &util::hyperlink_text($metavalue_utf8);
|
---|
| 345 |
|
---|
| 346 | $self->{'ppmd_table'} .= " <tr bgcolor=#b5d3cd>\n";
|
---|
| 347 | $self->{'ppmd_table'} .= " <td width=30%>\n";
|
---|
| 348 | $self->{'ppmd_table'} .= " $metaname\n";
|
---|
| 349 | $self->{'ppmd_table'} .= " </td>\n";
|
---|
| 350 | $self->{'ppmd_table'} .= " <td>\n";
|
---|
| 351 | $self->{'ppmd_table'} .= " $metavalue_utf8\n";
|
---|
| 352 | $self->{'ppmd_table'} .= " </td>\n";
|
---|
| 353 | $self->{'ppmd_table'} .= " </tr>\n";
|
---|
| 354 |
|
---|
| 355 | }
|
---|
| 356 |
|
---|
| 357 | sub close_prettyprint_metadata_table
|
---|
| 358 | {
|
---|
| 359 | my $self = shift(@_);
|
---|
| 360 |
|
---|
| 361 | $self->{'ppmd_table'} .= "</table>\n";
|
---|
| 362 | }
|
---|
| 363 |
|
---|
| 364 |
|
---|
[14940] | 365 | sub remap_dcterms_metadata
|
---|
| 366 | {
|
---|
| 367 | my $self = shift(@_);
|
---|
[9958] | 368 |
|
---|
[14940] | 369 | my ($metaname) = @_;
|
---|
[9958] | 370 |
|
---|
[14940] | 371 | my $dcterm_mapping = {
|
---|
| 372 | "alternative" => "dc.title",
|
---|
| 373 | "tableOfContents" => "dc.description",
|
---|
| 374 | "abstract" => "dc.description",
|
---|
| 375 | "created" => "dc.date",
|
---|
| 376 | "valid" => "dc.date",
|
---|
| 377 | "available" => "dc.date",
|
---|
| 378 | "issued" => "dc.date",
|
---|
| 379 | "modified" => "dc.date",
|
---|
| 380 | "dateAccepted" => "dc.date",
|
---|
| 381 | "dateCopyrighted" => "dc.date",
|
---|
| 382 | "dateSubmitted" => "dc.date",
|
---|
| 383 | "extent" => "dc.format",
|
---|
| 384 | "medium" => "dc.format",
|
---|
| 385 | "isVersionOf" => "dc.relation",
|
---|
| 386 | "hasVersion" => "dc.relation",
|
---|
| 387 | "isReplacedBy" => "dc.relation",
|
---|
| 388 | "replaces" => "dc.relation",
|
---|
| 389 | "isRequiredBy" => "dc.relation",
|
---|
| 390 | "requires" => "dc.relation",
|
---|
| 391 | "isPartOf" => "dc.relation",
|
---|
| 392 | "hasPart" => "dc.relation",
|
---|
| 393 | "isReferencedBy" => "dc.relation",
|
---|
| 394 | "references" => "dc.relation",
|
---|
| 395 | "isFormatOf" => "dc.relation",
|
---|
| 396 | "hasFormat" => "dc.relation",
|
---|
| 397 | "conformsTo" => "dc.relation",
|
---|
| 398 | "spatial" => "dc.coverage",
|
---|
| 399 | "temporal" => "dc.coverage",
|
---|
| 400 | "audience" => "dc.any",
|
---|
| 401 | "accrualMethod" => "dc.any",
|
---|
| 402 | "accrualPeriodicity" => "dc.any",
|
---|
| 403 | "accrualPolicy" => "dc.any",
|
---|
| 404 | "instructionalMethod" => "dc.any",
|
---|
| 405 | "provenance" => "dc.any",
|
---|
| 406 | "rightsHolder" => "dc.any",
|
---|
| 407 | "mediator" => "audience",
|
---|
| 408 | "educationLevel" => "audience",
|
---|
| 409 | "accessRights" => "dc.rights",
|
---|
| 410 | "license" => "dc.rights",
|
---|
| 411 | "bibliographicCitation" => "dc.identifier"
|
---|
| 412 | };
|
---|
| 413 |
|
---|
| 414 | my ($prefix,$name) = ($metaname =~ m/^(.*?)\.(.*?)$/);
|
---|
| 415 |
|
---|
| 416 | if ($prefix eq "dcterms")
|
---|
| 417 | {
|
---|
| 418 | if (defined $dcterm_mapping->{$name})
|
---|
| 419 | {
|
---|
| 420 | return $dcterm_mapping->{$name}."^".$name;
|
---|
| 421 | }
|
---|
| 422 |
|
---|
| 423 | }
|
---|
| 424 | return $metaname; # didn't get a match, return param passed in unchanged
|
---|
| 425 | }
|
---|
| 426 |
|
---|
| 427 |
|
---|
[4726] | 428 | sub extract_oai_metadata {
|
---|
| 429 | my $self = shift (@_);
|
---|
| 430 | my ($textref, $metadata) = @_;
|
---|
| 431 | my $outhandle = $self->{'outhandle'};
|
---|
| 432 |
|
---|
[9958] | 433 | # Only handles DC metadata
|
---|
| 434 |
|
---|
| 435 | $self->open_prettyprint_metadata_table();
|
---|
| 436 |
|
---|
| 437 | if ($$textref =~ m/<metadata\s*>(.*?)<\/metadata\s*>/s)
|
---|
[4726] | 438 | {
|
---|
[10254] | 439 | my $metadata_text = $1;
|
---|
[4726] | 440 |
|
---|
[14940] | 441 | # locate and remove outermost tag (ignoring any attribute information in top-level tag)
|
---|
| 442 | my ($wrapper_metadata_xml,$inner_metadata_text) = ($metadata_text =~ m/<([^ >]+).*?>(.*?)<\/\1>/s);
|
---|
| 443 |
|
---|
| 444 | # split tag into namespace and tag name
|
---|
| 445 | my($namespace,$top_level_prefix) = ($wrapper_metadata_xml =~ m/^(.*?):(.*?)$/);
|
---|
| 446 |
|
---|
[17066] | 447 | # sometimes, the dc namespace is not specified as the prefix in each element (like <dc:title>)
|
---|
| 448 | # but is rather defined in the wrapper element containing the various dc meta elements,
|
---|
| 449 | # like <dc><title></title><creator></creator></dc>.
|
---|
| 450 | # In such a case, we use this wrapper element as the top_level_prefix
|
---|
| 451 | if(!defined $top_level_prefix && defined $wrapper_metadata_xml && $wrapper_metadata_xml =~ m/dc$/) {
|
---|
| 452 | $top_level_prefix = $wrapper_metadata_xml;
|
---|
| 453 | }
|
---|
| 454 |
|
---|
| 455 | if ($top_level_prefix !~ m/dc$/) {
|
---|
[15872] | 456 | print $outhandle "Warning: OAIPlugin currently only designed for Dublin Core (or variant) metadata\n";
|
---|
[14940] | 457 | print $outhandle " This recorded metadata section '$top_level_prefix' does not appear to match.\n";
|
---|
| 458 | print $outhandle " Metadata assumed to be in form: <prefix:tag>value</prefix:tag> and will be converted\n";
|
---|
| 459 | print $outhandle " into Greenstone metadata as prefix.tag = value\n";
|
---|
| 460 | }
|
---|
| 461 |
|
---|
[14949] | 462 | while ($inner_metadata_text =~ m/<([^ >]+).*?>(.*?)<\/\1>(.*)/s)
|
---|
[4726] | 463 | {
|
---|
[9958] | 464 |
|
---|
[4726] | 465 | my $metaname = $1;
|
---|
| 466 | my $metavalue = $2;
|
---|
[14949] | 467 | $inner_metadata_text = $3;
|
---|
| 468 |
|
---|
[14940] | 469 | # $metaname =~ s/^(dc:)?(.)/\u$2/; # strip of optional prefix and uppercase first letter
|
---|
| 470 | $metaname =~ s/:/\./;
|
---|
| 471 | if ($metaname !~ m/\./)
|
---|
[4726] | 472 | {
|
---|
[14940] | 473 | $metaname = "$top_level_prefix.$metaname";
|
---|
[4726] | 474 | }
|
---|
[14963] | 475 | $metaname =~ s/\.(.)/\.\u$1/;
|
---|
[4726] | 476 |
|
---|
[14940] | 477 | $metaname = $self->remap_dcterms_metadata($metaname);
|
---|
| 478 |
|
---|
[14963] | 479 | $metavalue =~ s/\[/[/g;
|
---|
| 480 | $metavalue =~ s/\]/]/g;
|
---|
| 481 |
|
---|
[4726] | 482 | if (defined $metadata->{$metaname})
|
---|
| 483 | {
|
---|
| 484 | push(@{$metadata->{$metaname}},$metavalue);
|
---|
[8121] | 485 |
|
---|
[4726] | 486 | }
|
---|
| 487 | else
|
---|
| 488 | {
|
---|
| 489 | $metadata->{$metaname} = [ $metavalue ];
|
---|
| 490 | }
|
---|
| 491 |
|
---|
[9958] | 492 | $self->add_prettyprint_metadata_line($metaname, $metavalue);
|
---|
| 493 |
|
---|
[4726] | 494 | }
|
---|
| 495 | }
|
---|
[9958] | 496 |
|
---|
| 497 | $self->close_prettyprint_metadata_table();
|
---|
[4726] | 498 | }
|
---|
| 499 |
|
---|
[13886] | 500 | ## we know from the file extension, so doesn't need to check the doctype
|
---|
| 501 | sub check_doctype {
|
---|
| 502 |
|
---|
| 503 | return 1;
|
---|
| 504 | }
|
---|
| 505 |
|
---|
[4726] | 506 | 1;
|
---|