| 1 | ###########################################################################
|
|---|
| 2 | #
|
|---|
| 3 | # ISISPlug.pm -- A plugin for CDS/ISIS databases
|
|---|
| 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 1999-2004 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 |
|
|---|
| 27 | package ISISPlug;
|
|---|
| 28 |
|
|---|
| 29 |
|
|---|
| 30 | use multiread;
|
|---|
| 31 | use SplitPlug;
|
|---|
| 32 |
|
|---|
| 33 |
|
|---|
| 34 | # ISISPlug is a sub-class of SplitPlug.
|
|---|
| 35 | sub BEGIN {
|
|---|
| 36 | @ISA = ('SplitPlug');
|
|---|
| 37 | }
|
|---|
| 38 |
|
|---|
| 39 |
|
|---|
| 40 | my $arguments =
|
|---|
| 41 | [ { 'name' => "process_exp",
|
|---|
| 42 | 'desc' => "{BasPlug.process_exp}",
|
|---|
| 43 | 'type' => "regexp",
|
|---|
| 44 | 'reqd' => "no",
|
|---|
| 45 | 'deft' => &get_default_process_exp() },
|
|---|
| 46 | { 'name' => "block_exp",
|
|---|
| 47 | 'desc' => "{BasPlug.block_exp}",
|
|---|
| 48 | 'type' => "regexp",
|
|---|
| 49 | 'reqd' => "no",
|
|---|
| 50 | 'deft' => &get_default_block_exp() },
|
|---|
| 51 | { 'name' => "split_exp",
|
|---|
| 52 | 'desc' => "{SplitPlug.split_exp}",
|
|---|
| 53 | 'type' => "regexp",
|
|---|
| 54 | 'reqd' => "no",
|
|---|
| 55 | 'deft' => &get_default_split_exp() },
|
|---|
| 56 |
|
|---|
| 57 | # The interesting options
|
|---|
| 58 | { 'name' => "entry_separator",
|
|---|
| 59 | 'desc' => "{ISISPlug.entry_separator}",
|
|---|
| 60 | 'type' => "string",
|
|---|
| 61 | 'reqd' => "no",
|
|---|
| 62 | 'deft' => "<br>" },
|
|---|
| 63 | { 'name' => "subfield_separator",
|
|---|
| 64 | 'desc' => "{ISISPlug.subfield_separator}",
|
|---|
| 65 | 'type' => "string",
|
|---|
| 66 | 'reqd' => "no",
|
|---|
| 67 | 'deft' => ", " }
|
|---|
| 68 | ];
|
|---|
| 69 |
|
|---|
| 70 | my $options = { 'name' => "ISISPlug",
|
|---|
| 71 | 'desc' => "{ISISPlug.desc}",
|
|---|
| 72 | 'abstract' => "no",
|
|---|
| 73 | 'inherits' => "yes",
|
|---|
| 74 | 'explodes' => "yes",
|
|---|
| 75 | 'args' => $arguments };
|
|---|
| 76 |
|
|---|
| 77 |
|
|---|
| 78 | # This plugin processes files with the suffix ".mst"
|
|---|
| 79 | sub get_default_process_exp {
|
|---|
| 80 | return q^(?i)(\.mst)$^;
|
|---|
| 81 | }
|
|---|
| 82 |
|
|---|
| 83 |
|
|---|
| 84 | # This plugin blocks files with the suffix ".fdt" and ".xrf"
|
|---|
| 85 | sub get_default_block_exp {
|
|---|
| 86 | return q^(?i)(\.fdt|\.xrf)$^;
|
|---|
| 87 | }
|
|---|
| 88 |
|
|---|
| 89 |
|
|---|
| 90 | # This plugin splits the input text at the "----------" lines
|
|---|
| 91 | sub get_default_split_exp {
|
|---|
| 92 | return q^\r?\n----------\r?\n^;
|
|---|
| 93 | }
|
|---|
| 94 |
|
|---|
| 95 |
|
|---|
| 96 | sub new
|
|---|
| 97 | {
|
|---|
| 98 | my $class = shift(@_);
|
|---|
| 99 |
|
|---|
| 100 | my $self = new SplitPlug($class, @_);
|
|---|
| 101 | if (!parsargv::parse(\@_,
|
|---|
| 102 | q^subfield_separator/.*/, ^, \$self->{'subfield_separator'},
|
|---|
| 103 | q^entry_separator/.*/<br>^, \$self->{'entry_separator'},
|
|---|
| 104 | "allow_extra_options")) {
|
|---|
| 105 | print STDERR "\nIncorrect options passed to ISISPlug, check your collect.cfg configuration file\n";
|
|---|
| 106 | die "\n";
|
|---|
| 107 | }
|
|---|
| 108 |
|
|---|
| 109 | # To allow for proper inheritance of arguments
|
|---|
| 110 | my $option_list = $self->{'option_list'};
|
|---|
| 111 | push(@{$option_list}, $options);
|
|---|
| 112 | $self->{'plugin_type'} = "ISISPlug";
|
|---|
| 113 |
|
|---|
| 114 | return bless $self, $class;
|
|---|
| 115 | }
|
|---|
| 116 |
|
|---|
| 117 |
|
|---|
| 118 | sub read_file
|
|---|
| 119 | {
|
|---|
| 120 | my $self = shift (@_);
|
|---|
| 121 | my ($filename, $encoding, $language, $textref) = @_;
|
|---|
| 122 |
|
|---|
| 123 | my ($databasename) = ($filename =~ /(.*)\.mst$/i);
|
|---|
| 124 |
|
|---|
| 125 | # Check the associated .fdt and .xrf files exist
|
|---|
| 126 | # These files must have a lowercase extension for the IsisGdl program to work
|
|---|
| 127 | # Bailing out because of this is kind of crappy but it is only an issue on Unix
|
|---|
| 128 | my $fdtfilename = $databasename . ".fdt";
|
|---|
| 129 | if (! -e $fdtfilename) {
|
|---|
| 130 | die "Error: Could not find ISIS FDT file $fdtfilename.\n";
|
|---|
| 131 | }
|
|---|
| 132 | my $xrffilename = $databasename . ".xrf";
|
|---|
| 133 | if (! -e $xrffilename) {
|
|---|
| 134 | die "Error: Could not find ISIS XRF file $xrffilename.\n";
|
|---|
| 135 | }
|
|---|
| 136 |
|
|---|
| 137 | # The text to split is exported from the database by the IsisGdl program
|
|---|
| 138 | open(FILE, "IsisGdl \"$filename\" |");
|
|---|
| 139 |
|
|---|
| 140 | my $reader = new multiread();
|
|---|
| 141 | $reader->set_handle('ISISPlug::FILE');
|
|---|
| 142 | $reader->set_encoding($encoding);
|
|---|
| 143 | $reader->read_file($textref);
|
|---|
| 144 |
|
|---|
| 145 | close(FILE);
|
|---|
| 146 |
|
|---|
| 147 | # Parse the associated ISIS database Field Definition Table file (.fdt)
|
|---|
| 148 | my %fdtmapping = &parse_field_definition_table($fdtfilename);
|
|---|
| 149 |
|
|---|
| 150 | # Map the tag numbers to tag names, using the FDT mapping
|
|---|
| 151 | $$textref =~ s/\r?\ntag=(\d+) /\ntag=$fdtmapping{$1}{'title'} /g;
|
|---|
| 152 |
|
|---|
| 153 | # Remove the line at the start so it is split and processed properly
|
|---|
| 154 | $$textref =~ s/^----------\n//;
|
|---|
| 155 | }
|
|---|
| 156 |
|
|---|
| 157 |
|
|---|
| 158 | sub process
|
|---|
| 159 | {
|
|---|
| 160 | my $self = shift (@_);
|
|---|
| 161 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
|
|---|
| 162 | my $outhandle = $self->{'outhandle'};
|
|---|
| 163 |
|
|---|
| 164 | my $subfield_separator = $self->{'subfield_separator'};
|
|---|
| 165 | my $entry_separator = $self->{'entry_separator'};
|
|---|
| 166 |
|
|---|
| 167 | # Report that we're processing the file
|
|---|
| 168 | print STDERR "<Processing n='$file' p='ISISPlug'>\n" if ($gli);
|
|---|
| 169 | print $outhandle "IsisPlug: processing $file\n"
|
|---|
| 170 | if ($self->{'verbosity'}) > 1;
|
|---|
| 171 |
|
|---|
| 172 | # Process each line of the ISIS record, one at a time
|
|---|
| 173 | foreach $line (split(/\n/, $$textref)) {
|
|---|
| 174 | $line =~ /^tag=(.*) data=(.+)$/;
|
|---|
| 175 | my $rawtagname = $1;
|
|---|
| 176 | my $rawtagdata = $2;
|
|---|
| 177 | # print STDERR "Raw tag: $rawtagname, Raw data: $rawtagdata\n";
|
|---|
| 178 | next if ($rawtagname eq "");
|
|---|
| 179 |
|
|---|
| 180 | # Metadata field names: title case, then remove spaces
|
|---|
| 181 | my $tagname = "";
|
|---|
| 182 | foreach $word (split(/\s+/, $rawtagname)) {
|
|---|
| 183 | substr($word, 0, 1) =~ tr/a-z/A-Z/;
|
|---|
| 184 | $tagname .= $word;
|
|---|
| 185 | }
|
|---|
| 186 |
|
|---|
| 187 | # Make sure there is nothing bad in the tag names
|
|---|
| 188 | $tagname =~ s/&//g;
|
|---|
| 189 |
|
|---|
| 190 | # Handle each piece of metadata ('%' separated)
|
|---|
| 191 | my $completetagvalue = "";
|
|---|
| 192 | foreach $rawtagvalue (split(/%/, $rawtagdata)) {
|
|---|
| 193 | $completetagvalue .= $entry_separator unless ($completetagvalue eq "");
|
|---|
| 194 |
|
|---|
| 195 | # Metadata field values: take care with subfields
|
|---|
| 196 | my $completeentryvalue = "";
|
|---|
| 197 | while ($rawtagvalue ne "") {
|
|---|
| 198 | # If there is a subfield specifier, parse it off
|
|---|
| 199 | my $subfieldname = "";
|
|---|
| 200 | if ($rawtagvalue =~ s/^\^// && $rawtagvalue =~ s/([a-z])//) {
|
|---|
| 201 | $subfieldname = "^$1";
|
|---|
| 202 | }
|
|---|
| 203 |
|
|---|
| 204 | # Parse the metadata value off
|
|---|
| 205 | $rawtagvalue =~ s/^([^\^]*)//;
|
|---|
| 206 | my $metadatafieldname = $tagname . $subfieldname;
|
|---|
| 207 | my $metadatafieldvalue = $1;
|
|---|
| 208 |
|
|---|
| 209 | # Handle Keywords specially
|
|---|
| 210 | if ($metadatafieldname eq "Keywords") {
|
|---|
| 211 | my $keywordmetadatavalue = $metadatafieldvalue;
|
|---|
| 212 | my $keywordlist = "";
|
|---|
| 213 | while ($keywordmetadatavalue =~ s/\<(.+?)\>//) {
|
|---|
| 214 | my $keyword = $1;
|
|---|
| 215 | $doc_obj->add_utf8_metadata($cursection, $metadatafieldname, $keyword);
|
|---|
| 216 | $keywordlist .= ", " unless ($keywordlist eq "");
|
|---|
| 217 | $keywordlist .= $keyword;
|
|---|
| 218 | }
|
|---|
| 219 |
|
|---|
| 220 | $metadatafieldvalue = $keywordlist;
|
|---|
| 221 | }
|
|---|
| 222 |
|
|---|
| 223 | # Escape any '<' and '>' characters so they appear correctly in the final collection
|
|---|
| 224 | $metadatafieldvalue =~ s/\</</g;
|
|---|
| 225 | $metadatafieldvalue =~ s/\>/>/g;
|
|---|
| 226 |
|
|---|
| 227 | # We have already added Keywords metadata above
|
|---|
| 228 | unless ($metadatafieldname eq "Keywords") {
|
|---|
| 229 | $doc_obj->add_utf8_metadata($cursection, $metadatafieldname, $metadatafieldvalue);
|
|---|
| 230 | }
|
|---|
| 231 |
|
|---|
| 232 | $completeentryvalue .= $subfield_separator unless ($completeentryvalue eq "");
|
|---|
| 233 | $completeentryvalue .= $metadatafieldvalue;
|
|---|
| 234 | }
|
|---|
| 235 |
|
|---|
| 236 | $completetagvalue .= $completeentryvalue;
|
|---|
| 237 | }
|
|---|
| 238 |
|
|---|
| 239 | $doc_obj->add_utf8_metadata($cursection, $tagname . "^all", $completetagvalue);
|
|---|
| 240 | }
|
|---|
| 241 |
|
|---|
| 242 | # Add the full record as the document text
|
|---|
| 243 | $$textref =~ s/\</</g;
|
|---|
| 244 | $$textref =~ s/\>/>/g;
|
|---|
| 245 | $doc_obj->add_utf8_text($cursection, $$textref);
|
|---|
| 246 |
|
|---|
| 247 | # Add FileFormat metadata
|
|---|
| 248 | $doc_obj->add_utf8_metadata($cursection, "FileFormat", "CDS/ISIS");
|
|---|
| 249 |
|
|---|
| 250 | # Record was processed successfully (and there was no document obtained)
|
|---|
| 251 | return 1;
|
|---|
| 252 | }
|
|---|
| 253 |
|
|---|
| 254 |
|
|---|
| 255 | sub parse_field_definition_table
|
|---|
| 256 | {
|
|---|
| 257 | my $fdtfilename = shift(@_);
|
|---|
| 258 |
|
|---|
| 259 | my %fdtmapping = ();
|
|---|
| 260 |
|
|---|
| 261 | open(FDT_FILE, "<$fdtfilename") || die "Error: Could not open file $fdtfilename.\n";
|
|---|
| 262 |
|
|---|
| 263 | my $amongstdefinitions = 0;
|
|---|
| 264 | foreach $fdtfileline (<FDT_FILE>) {
|
|---|
| 265 | $fdtfileline =~ s/(\s*)$//; # Remove any nasty spaces at the end of the lines
|
|---|
| 266 |
|
|---|
| 267 | if ($amongstdefinitions) {
|
|---|
| 268 | my $fieldtitle = substr($fdtfileline, 0, 30);
|
|---|
| 269 | my $fieldsubfields = substr($fdtfileline, 30, 20);
|
|---|
| 270 | my $fieldspecs = substr($fdtfileline, 50);
|
|---|
| 271 |
|
|---|
| 272 | # Remove extra spaces
|
|---|
| 273 | $fieldtitle =~ s/(\s*)$//;
|
|---|
| 274 | $fieldsubfields =~ s/(\s*)$//;
|
|---|
| 275 |
|
|---|
| 276 | # Map from tag number to metadata field title and subfields
|
|---|
| 277 | my $fieldtag = (split(/ /, $fieldspecs))[0];
|
|---|
| 278 | $fdtmapping{$fieldtag} = { 'title' => $fieldtitle,
|
|---|
| 279 | 'subfields' => $fieldsubfields };
|
|---|
| 280 | }
|
|---|
| 281 | elsif ($fdtfileline eq "***") {
|
|---|
| 282 | $amongstdefinitions = 1;
|
|---|
| 283 | }
|
|---|
| 284 | }
|
|---|
| 285 |
|
|---|
| 286 | close(FDT_FILE);
|
|---|
| 287 |
|
|---|
| 288 | return %fdtmapping;
|
|---|
| 289 | }
|
|---|
| 290 |
|
|---|
| 291 |
|
|---|
| 292 | 1;
|
|---|
