[537] | 1 | ###########################################################################
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| 2 | #
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| 3 | # classify.pm --
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| 4 | # A component of the Greenstone digital library software
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| 5 | # from the New Zealand Digital Library Project at the
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| 6 | # University of Waikato, New Zealand.
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| 7 | #
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| 8 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 9 | #
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| 10 | # This program is free software; you can redistribute it and/or modify
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| 11 | # it under the terms of the GNU General Public License as published by
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| 12 | # the Free Software Foundation; either version 2 of the License, or
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| 13 | # (at your option) any later version.
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| 14 | #
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| 15 | # This program is distributed in the hope that it will be useful,
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| 16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | # GNU General Public License for more details.
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| 19 | #
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| 20 | # You should have received a copy of the GNU General Public License
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| 21 | # along with this program; if not, write to the Free Software
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| 22 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 23 | #
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| 24 | ###########################################################################
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| 25 |
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[214] | 26 | # functions to handle classifiers
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| 27 |
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| 28 | package classify;
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| 29 |
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| 30 | require util;
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[8220] | 31 | require AllList;
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[15703] | 32 |
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[15705] | 33 | use dbutil;
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[5682] | 34 | use gsprintf;
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[15703] | 35 | use strict; no strict 'subs';
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[214] | 36 |
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[11994] | 37 |
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[5682] | 38 | sub gsprintf
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| 39 | {
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| 40 | return &gsprintf::gsprintf(@_);
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| 41 | }
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| 42 |
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| 43 |
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[6967] | 44 | sub load_classifier_for_info {
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| 45 | my ($classifier) = shift @_;
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[214] | 46 |
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[6967] | 47 | # find the classifier
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[14239] | 48 | my $customclassname;
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| 49 | if (defined($ENV{'GSDLCOLLECTION'}))
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| 50 | {
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| 51 | $customclassname = &util::filename_cat($ENV{'GSDLCOLLECTDIR'}, "custom", $ENV{'GSDLCOLLECTION'},
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[14112] | 52 | "perllib", "classify", "${classifier}.pm");
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[14239] | 53 | }
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[14112] | 54 | my $colclassname = &util::filename_cat($ENV{'GSDLCOLLECTDIR'}, "perllib", "classify", "${classifier}.pm");
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| 55 | my $mainclassname = &util::filename_cat($ENV{'GSDLHOME'}, "perllib", "classify", "${classifier}.pm");
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[6967] | 56 |
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[14239] | 57 | if (defined($customclassname) && -e $customclassname) { require $customclassname; }
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[14112] | 58 | elsif (-e $colclassname) { require $colclassname; }
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[6967] | 59 | elsif (-e $mainclassname) { require $mainclassname; }
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| 60 | else {
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| 61 | &gsprintf(STDERR, "{classify.could_not_find_classifier}\n", $classifier) && die "\n";
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| 62 | }
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| 63 | my ($classobj);
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| 64 | my $options = "-gsdlinfo";
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[10218] | 65 | eval ("\$classobj = new \$classifier([],[$options])");
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[6967] | 66 | die "$@" if $@;
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| 67 |
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| 68 | return $classobj;
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| 69 | }
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| 70 |
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[811] | 71 | sub load_classifiers {
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[1839] | 72 | my ($classify_list, $build_dir, $outhandle) = @_;
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[811] | 73 | my @classify_objects = ();
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[8220] | 74 | my $classify_number = 1;
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[13933] | 75 |
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| 76 | my $colclassdir = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},"perllib/classify");
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| 77 | unshift (@INC, $colclassdir);
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[811] | 78 |
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[15703] | 79 | foreach my $classifyoption (@$classify_list) {
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[214] | 80 |
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[811] | 81 | # get the classifier name
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| 82 | my $classname = shift @$classifyoption;
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| 83 | next unless defined $classname;
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[1839] | 84 |
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[811] | 85 | # find the classifier
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[14112] | 86 | my $customclassname = &util::filename_cat($ENV{'GSDLCOLLECTDIR'}, "custom", $ENV{'GSDLCOLLECTION'},
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| 87 | "perllib", "classify", "${classname}.pm");
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| 88 | my $colclassname = &util::filename_cat($ENV{'GSDLCOLLECTDIR'}, "perllib", "classify", "${classname}.pm");
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| 89 | my $mainclassname = &util::filename_cat($ENV{'GSDLHOME'}, "perllib", "classify", "${classname}.pm");
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[214] | 90 |
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[14112] | 91 | if (-e $customclassname) { require $customclassname; }
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| 92 | elsif (-e $colclassname) { require $colclassname; }
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[811] | 93 | elsif (-e $mainclassname) { require $mainclassname; }
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[5682] | 94 | else { &gsprintf(STDERR, "{classify.could_not_find_classifier}\n", $classname) && die "\n";
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| 95 | # die "ERROR - couldn't find classifier \"$classname\"\n";
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[14112] | 96 | }
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[214] | 97 |
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[811] | 98 | # create the classify object
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| 99 | my ($classobj);
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[1839] | 100 |
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| 101 | my @newoptions;
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[6964] | 102 |
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| 103 | # do these first so they can be overriden by user supplied options
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| 104 | push @newoptions, "-builddir", "$build_dir" if ($build_dir);
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| 105 | push @newoptions, "-outhandle", "$outhandle" if ($outhandle);
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| 106 | push @newoptions, "-verbosity", "2";
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| 107 |
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[6967] | 108 | # backwards compatability hack: if the classifier options are
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| 109 | # in "x=y" format, convert them to parsearg ("-x y") format.
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| 110 | my ($opt, $key, $value);
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[1839] | 111 | foreach $opt (@$classifyoption) {
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[11644] | 112 | # if ($opt =~ /^(\w+)=(.*)$/) {
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| 113 | # push @newoptions, "-$1", $2;
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| 114 | # } else {
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[1839] | 115 | push @newoptions, $opt;
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[11644] | 116 | #}
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[1839] | 117 | }
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| 118 |
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| 119 | map { $_ = "\"$_\""; } @newoptions;
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| 120 | my $options .= join (",", @newoptions);
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| 121 |
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[10218] | 122 |
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| 123 | eval ("\$classobj = new \$classname([],[$options])");
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[811] | 124 | die "$@" if $@;
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[1839] | 125 |
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[8220] | 126 | $classobj->set_number($classify_number);
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| 127 | $classify_number ++;
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| 128 |
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[1839] | 129 | # add this object to the list
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[811] | 130 | push (@classify_objects, $classobj);
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| 131 | }
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| 132 |
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[8220] | 133 | my ($classobj);
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| 134 | eval ("\$classobj = new AllList()");
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| 135 | die "$@" if $@;
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| 136 | push (@classify_objects, $classobj);
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| 137 |
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[811] | 138 | return \@classify_objects;
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[214] | 139 | }
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| 140 |
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| 141 | # init_classifiers resets all the classifiers and readys them to process
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[315] | 142 | # the documents.
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[214] | 143 | sub init_classifiers {
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| 144 | my ($classifiers) = @_;
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| 145 |
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[15703] | 146 | foreach my $classobj (@$classifiers) {
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[214] | 147 | $classobj->init();
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| 148 | }
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| 149 | }
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| 150 |
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[11994] | 151 |
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| 152 |
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[15704] | 153 | # takes a hashref containing the metadata for an infodb entry, and extracts
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[11994] | 154 | # the childrens numbers (from the 'contains' entry).
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| 155 | # assumes format is ".1;".2;".3
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| 156 | sub get_children {
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| 157 | my ($doc_db_hash) = @_;
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| 158 |
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| 159 | my $children = undef;
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| 160 |
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[15703] | 161 | my $contains = $doc_db_hash->{'contains'};
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| 162 | if (defined ($contains)) {
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| 163 | $contains =~ s/\@$//; #remove trailing @
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| 164 | $contains =~ s/^\"\.//; #remove initial ".
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| 165 | @$children = split /\;\"\./, $contains;
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[11994] | 166 | }
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| 167 |
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| 168 | return $children;
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| 169 | }
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| 170 |
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| 171 |
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| 172 | sub recurse_sections {
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[15704] | 173 | my ($doc_obj, $children, $parentoid, $parentsection, $database_recs) = @_;
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[11994] | 174 |
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| 175 | return if (!defined $children);
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| 176 |
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| 177 | foreach my $child (sort { $a <=> $b} @$children) {
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| 178 | $doc_obj->create_named_section("$parentsection.$child");
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[15704] | 179 | my $doc_db_rec = $database_recs->{"$parentoid.$child"};
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[11994] | 180 | my $doc_db_hash = db_rec_to_hash($doc_db_rec);
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| 181 |
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| 182 | # get child's children
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| 183 | my $newchildren = &get_children($doc_db_hash);
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| 184 |
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| 185 | # add content for current section
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| 186 | add_section_content($doc_obj, "$parentsection.$child", $doc_db_hash);
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| 187 |
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| 188 | # process all the children if there are any
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| 189 | if (defined ($newchildren))
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| 190 | {
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| 191 | recurse_sections($doc_obj, $newchildren, "$parentoid.$child",
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[15704] | 192 | "$parentsection.$child", $database_recs);
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[11994] | 193 | }
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| 194 | }
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| 195 | }
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| 196 |
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| 197 |
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| 198 | sub add_section_content {
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| 199 | my ($doc_obj, $cursection, $doc_db_hash) = @_;
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| 200 |
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[15703] | 201 | foreach my $key (keys %$doc_db_hash) {
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[11994] | 202 | #don't need to store these metadata
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| 203 | next if $key =~ /(thistype|childtype|contains|docnum|doctype|classifytype)/i;
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| 204 | # but do want things like hastxt and archivedir
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| 205 | my @items = split /@/, $doc_db_hash->{$key};
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| 206 | map {$doc_obj->add_metadata ($cursection, $key, $_); } @items;
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| 207 |
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| 208 | }
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| 209 | }
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| 210 |
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| 211 |
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[15704] | 212 | # gets all the metadata from an infodb entry, and puts it into a hashref
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[11994] | 213 | sub db_rec_to_hash {
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| 214 |
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| 215 | my ($gdb_str_ref) = @_;
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| 216 |
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| 217 | my $hashref = {};
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| 218 |
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| 219 | my @entries = split(/\n/, $gdb_str_ref);
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[15703] | 220 | foreach my $entry (@entries) {
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[11994] | 221 | my($key, $value) = ($entry =~ /^<([^>]*)>(.*?)$/ );
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| 222 | $hashref->{$key} .= '@' if defined $hashref->{$key};
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| 223 | $hashref->{$key} .= $value;
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| 224 |
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| 225 | }
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| 226 |
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| 227 | return $hashref;
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| 228 | }
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| 229 |
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| 230 |
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| 231 | sub reconstruct_doc_objs_metadata
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| 232 | {
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[15725] | 233 | my $infodb_type = shift(@_);
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| 234 | my $infodb_file_path = shift(@_);
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[11994] | 235 |
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[15704] | 236 | my %database_recs;
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[15725] | 237 | &dbutil::read_infodb_file($infodb_type, $infodb_file_path, \%database_recs);
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[11994] | 238 |
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| 239 | # dig out top level doc sections
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| 240 | my %top_sections = ();
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[13068] | 241 | my %top_docnums = ();
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[15704] | 242 | foreach my $key ( keys %database_recs )
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[11994] | 243 | {
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[15704] | 244 | my $md_rec = $database_recs{$key};
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[11994] | 245 | my $md_hash = db_rec_to_hash($md_rec);
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| 246 |
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| 247 | if ((defined $md_hash->{'doctype'}) && ($md_hash->{'doctype'} eq "doc")) {
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| 248 | next if ($key =~ m/\./);
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| 249 | $top_sections{$key} = $md_hash;
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[13068] | 250 | $top_docnums{$key} = $md_hash->{'docnum'};
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[11994] | 251 | }
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| 252 | }
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| 253 |
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[15704] | 254 | # for greenstone document objects based on metadata in database file
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[11994] | 255 | my @all_docs = ();
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[13068] | 256 | # we need to make sure the documents were processed in the same order as
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| 257 | # before, so sort based on their docnums
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| 258 | foreach my $oid ( sort { $top_docnums{$a} <=> $top_docnums{$b} } keys %top_sections )
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[11994] | 259 | {
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| 260 | my $doc_db_hash = $top_sections{$oid};
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| 261 |
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| 262 | my $doc_obj = new doc();
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| 263 | $doc_obj->set_OID($oid);
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| 264 | my $top = $doc_obj->get_top_section();
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| 265 | add_section_content ($doc_obj, $top, $doc_db_hash);
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| 266 | my $children = &get_children($doc_db_hash);
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[15704] | 267 | recurse_sections($doc_obj, $children, $oid, $top, \%database_recs);
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[11994] | 268 |
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| 269 | push(@all_docs,$doc_obj);
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| 270 | }
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| 271 |
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| 272 | return \@all_docs;
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| 273 | }
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| 274 |
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| 275 |
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| 276 |
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| 277 |
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| 278 |
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[214] | 279 | # classify_doc lets each of the classifiers classify a document
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| 280 | sub classify_doc {
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| 281 | my ($classifiers, $doc_obj) = @_;
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| 282 |
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[15703] | 283 | foreach my $classobj (@$classifiers) {
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[8220] | 284 | my $title = $classobj->{'title'};
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[214] | 285 | $classobj->classify($doc_obj);
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| 286 | }
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| 287 | }
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| 288 |
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[15702] | 289 |
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[214] | 290 | # output_classify_info outputs all the info needed for the classification
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[15702] | 291 | # to the database
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| 292 | sub output_classify_info
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| 293 | {
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[15725] | 294 | my ($classifiers, $infodb_type, $infodb_handle, $remove_empty_classifications, $gli) = @_;
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[214] | 295 |
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[6332] | 296 | $gli = 0 unless defined $gli;
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| 297 |
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[315] | 298 | # create a classification containing all the info
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[15702] | 299 | my $classifyinfo = { 'classifyOID'=> 'browse',
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| 300 | 'contains' => [] };
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[315] | 301 |
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| 302 | # get each of the classifications
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[15702] | 303 | my $next_classify_num = 1;
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[15703] | 304 | foreach my $classifier (@$classifiers)
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[15702] | 305 | {
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| 306 | my $classifier_info = $classifier->get_classify_info($gli);
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| 307 | $classifier_info->{'classifyOID'} = "CL$next_classify_num" unless defined($classifier_info->{'classifyOID'});
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| 308 | print STDERR "*** outputting information for classifier: $classifier_info->{'classifyOID'}\n";
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[8220] | 309 |
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[15702] | 310 | push(@{$classifyinfo->{'contains'}}, $classifier_info);
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[315] | 311 | $next_classify_num++;
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[214] | 312 | }
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| 313 |
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[15725] | 314 | &print_classify_info($infodb_type, $infodb_handle, $classifyinfo, "", $remove_empty_classifications);
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[214] | 315 | }
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| 316 |
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[831] | 317 |
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[15702] | 318 | sub print_classify_info
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| 319 | {
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[15725] | 320 | my ($infodb_type, $infodb_handle, $classifyinfo, $OID, $remove_empty_classifications) = @_;
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[15702] | 321 |
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[315] | 322 | $OID =~ s/^\.+//; # just for good luck
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[214] | 323 |
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[315] | 324 | # book information is printed elsewhere
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| 325 | return if (defined ($classifyinfo->{'OID'}));
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| 326 |
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| 327 | # don't want empty classifications
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[8445] | 328 | return if (&check_contents ($classifyinfo, $remove_empty_classifications) == 0 && $remove_empty_classifications);
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[315] | 329 |
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[8361] | 330 | $OID = $classifyinfo->{'classifyOID'} if defined ($classifyinfo->{'classifyOID'});
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[15702] | 331 |
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| 332 | my %classify_infodb = ();
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| 333 | $classify_infodb{"doctype"} = [ "classify" ];
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| 334 | $classify_infodb{"hastxt"} = [ "0" ];
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| 335 | $classify_infodb{"childtype"} = [ $classifyinfo->{'childtype'} ]
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[8361] | 336 | if defined $classifyinfo->{'childtype'};
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[15702] | 337 | $classify_infodb{"Title"} = [ $classifyinfo->{'Title'} ]
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[8361] | 338 | if defined $classifyinfo->{'Title'};
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[15702] | 339 | $classify_infodb{"numleafdocs"} = [ $classifyinfo->{'numleafdocs'} ]
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[8361] | 340 | if defined $classifyinfo->{'numleafdocs'};
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[15702] | 341 | $classify_infodb{"thistype"} = [ $classifyinfo->{'thistype'} ]
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[8361] | 342 | if defined $classifyinfo->{'thistype'};
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[15702] | 343 | $classify_infodb{"parameters"} = [ $classifyinfo->{'parameters'} ]
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[8361] | 344 | if defined $classifyinfo->{'parameters'};
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[15702] | 345 | $classify_infodb{"supportsmemberof"} = [ $classifyinfo->{'supportsmemberof'} ]
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[8361] | 346 | if defined $classifyinfo->{'supportsmemberof'};
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| 347 |
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[15702] | 348 | my $contains_text = "";
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| 349 | my $mdoffset_text = "";
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[8361] | 350 |
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| 351 | my $next_subOID = 1;
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| 352 | my $first = 1;
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[15702] | 353 | foreach my $tempinfo (@{$classifyinfo->{'contains'}}) {
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[8361] | 354 | # empty contents were made undefined by clean_contents()
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| 355 | next unless defined $tempinfo;
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[315] | 356 |
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[8361] | 357 | if (!defined ($tempinfo->{'classifyOID'}) ||
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| 358 | $tempinfo->{'classifyOID'} ne "oai") {
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| 359 | $contains_text .= ";" unless $first;
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| 360 | }
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| 361 | $mdoffset_text .= ";" unless $first;
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| 362 | $first = 0;
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[315] | 363 |
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[16959] | 364 | if (defined ($tempinfo->{'classifyOID'}))
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| 365 | {
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| 366 | if ($tempinfo->{'classifyOID'} ne "oai")
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| 367 | {
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[8361] | 368 | $contains_text .= $tempinfo->{'classifyOID'};
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[8275] | 369 | }
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[12844] | 370 |
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[15725] | 371 | &print_classify_info ($infodb_type, $infodb_handle, $tempinfo, $tempinfo->{'classifyOID'},
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[8361] | 372 | $remove_empty_classifications);
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[16959] | 373 | }
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| 374 | elsif (defined ($tempinfo->{'OID'}))
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| 375 | {
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[8361] | 376 | $contains_text .= $tempinfo->{'OID'};
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[12844] | 377 | $mdoffset_text .= $tempinfo->{'offset'} if (defined ($tempinfo->{'offset'}));
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[16959] | 378 | }
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| 379 | else
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| 380 | {
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| 381 | # Supress having top-level node in Collage classifier
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| 382 | # so no bookshelf icon appears, top-level, along with the
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| 383 | # applet
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| 384 | if (!defined ($tempinfo->{'Title'}) || $tempinfo->{'Title'} ne "Collage")
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| 385 | {
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| 386 | $contains_text .= "\".$next_subOID";
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| 387 | }
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[12844] | 388 |
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[16959] | 389 | &print_classify_info ($infodb_type, $infodb_handle, $tempinfo, "$OID.$next_subOID",
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| 390 | $remove_empty_classifications);
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| 391 | $next_subOID++;
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| 392 | }
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[315] | 393 | }
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[8361] | 394 |
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[15702] | 395 | $classify_infodb{"contains"} = [ $contains_text ];
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| 396 | $classify_infodb{"mdtype"} = [ $classifyinfo->{'mdtype'} ]
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[8361] | 397 | if defined $classifyinfo->{'mdtype'};
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[15702] | 398 | $classify_infodb{"mdoffset"} = [ $mdoffset_text ]
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| 399 | if ($mdoffset_text !~ m/^;+$/);
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[8361] | 400 |
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[15725] | 401 | &dbutil::write_infodb_entry($infodb_type, $infodb_handle, $OID, \%classify_infodb);
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[315] | 402 | }
|
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| 403 |
|
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[15702] | 404 |
|
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[637] | 405 | sub check_contents {
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[8445] | 406 | my ($classifyinfo,$remove_empty_classifications) = @_;
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| 407 | $remove_empty_classifications = 0 unless ($remove_empty_classifications);
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[637] | 408 | my $num_leaf_docs = 0;
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| 409 | my $sub_num_leaf_docs = 0;
|
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[315] | 410 |
|
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[637] | 411 | return $classifyinfo->{'numleafdocs'} if (defined $classifyinfo->{'numleafdocs'});
|
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| 412 |
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[15703] | 413 | foreach my $content (@{$classifyinfo->{'contains'}}) {
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[315] | 414 | if (defined $content->{'OID'}) {
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| 415 | # found a book
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[637] | 416 | $num_leaf_docs ++;
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[9790] | 417 | } elsif (($sub_num_leaf_docs = &check_contents ($content,$remove_empty_classifications)) > 0) {
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[315] | 418 | # there's a book somewhere below
|
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[637] | 419 | $num_leaf_docs += $sub_num_leaf_docs;
|
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[315] | 420 | } else {
|
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[8445] | 421 | if ($remove_empty_classifications){
|
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| 422 | # section contains no books so we want to remove
|
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| 423 | # it from its parents contents
|
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| 424 | $content = undef;
|
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| 425 | }
|
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[315] | 426 | }
|
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| 427 | }
|
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[637] | 428 |
|
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| 429 | $classifyinfo->{'numleafdocs'} = $num_leaf_docs;
|
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| 430 | return $num_leaf_docs;
|
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[315] | 431 | }
|
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| 432 |
|
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[214] | 433 | 1;
|
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