[15867] | 1 | package KeyphraseExtractor;
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| 2 |
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| 3 | use Kea;
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| 4 | use PrintInfo;
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| 5 |
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| 6 | BEGIN {
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| 7 | @KeyphraseExtractor::ISA = ('PrintInfo');
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| 8 | }
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| 9 |
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| 10 | my $arguments = [
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| 11 | { 'name' => "extract_keyphrases",
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| 12 | 'desc' => "{KeyphraseExtractor.extract_keyphrases}",
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| 13 | 'type' => "flag",
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| 14 | 'reqd' => "no" },
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| 15 | { 'name' => "extract_keyphrases_kea4",
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| 16 | 'desc' => "{KeyphraseExtractor.extract_keyphrases_kea4}",
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| 17 | 'type' => "flag",
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| 18 | 'reqd' => "no" },
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| 19 | { 'name' => "extract_keyphrase_options",
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| 20 | 'desc' => "{KeyphraseExtractor.extract_keyphrase_options}",
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| 21 | 'type' => "string",
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| 22 | 'deft' => "",
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| 23 | 'reqd' => "no" }
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| 24 | ];
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| 25 |
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| 26 | my $options = { 'name' => "KeyphraseExtractor",
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| 27 | 'desc' => "{KeyphraseExtractor.desc}",
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| 28 | 'abstract' => "yes",
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| 29 | 'inherits' => "yes",
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| 30 | 'args' => $arguments };
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| 31 |
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| 32 |
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| 33 | sub new {
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| 34 | my ($class) = shift (@_);
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| 35 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 36 | push(@$pluginlist, $class);
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| 37 |
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| 38 | if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
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| 39 | if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
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| 40 |
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| 41 | my $self = new PrintInfo($pluginlist, $inputargs, $hashArgOptLists);
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| 42 |
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| 43 | return bless $self, $class;
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| 44 |
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| 45 | }
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| 46 | # extract metadata
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| 47 | sub extract_keyphrase_metadata {
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| 48 |
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| 49 | my $self = shift (@_);
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| 50 | my ($doc_obj) = @_;
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| 51 |
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| 52 | if ($self->{'extract_keyphrases'} || $self->{'extract_keyphrases_kea4'}) {
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| 53 | $self->extract_keyphrases($doc_obj);
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| 54 | }
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| 55 |
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| 56 | }
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| 57 |
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| 58 |
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| 59 | #adding kea keyphrases
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| 60 | sub extract_keyphrases
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| 61 | {
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| 62 | my $self = shift(@_);
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| 63 | my $doc_obj = shift(@_);
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| 64 |
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| 65 | # Use Kea 3.0 unless 4.0 has been specified
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| 66 | my $kea_version = "3.0";
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| 67 | if ($self->{'extract_keyphrases_kea4'}) {
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| 68 | $kea_version = "4.0";
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| 69 | }
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| 70 |
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| 71 | # Check that Kea exists, and tell the user where to get it if not
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| 72 | my $keahome = &Kea::get_Kea_directory($kea_version);
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| 73 | if (!-e $keahome) {
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| 74 | gsprintf(STDERR, "{KeyphraseExtractor.missing_kea}\n", $keahome, $kea_version);
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| 75 | return;
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| 76 | }
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| 77 |
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| 78 | my $thissection = $doc_obj->get_top_section();
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| 79 | my $text = "";
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| 80 | my $list;
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| 81 |
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| 82 | #loop through sections to gather whole doc
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| 83 | while (defined $thissection) {
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| 84 | my $sectiontext = $doc_obj->get_text($thissection);
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| 85 | $text = $text.$sectiontext;
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| 86 | $thissection = $doc_obj->get_next_section ($thissection);
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| 87 | }
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| 88 |
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| 89 | if($self->{'extract_keyphrase_options'}) { #if kea options flag is set, call Kea with specified options
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| 90 | $list = &Kea::extract_KeyPhrases ($kea_version, $text, $self->{'extract_keyphrase_options'});
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| 91 | } else { #otherwise call Kea with no options
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| 92 | $list = &Kea::extract_KeyPhrases ($kea_version, $text);
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| 93 | }
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| 94 |
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| 95 | if ($list){
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| 96 | # if a list of kea keyphrases was returned (ie not empty)
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| 97 | if ($self->{'verbosity'}) {
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| 98 | gsprintf(STDERR, "{KeyphraseExtractor.keyphrases}: $list\n");
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| 99 | }
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| 100 |
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| 101 | #add metadata to top section
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| 102 | $thissection = $doc_obj->get_top_section();
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| 103 |
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| 104 | # add all key phrases as one metadata
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| 105 | $doc_obj->add_metadata($thissection, "Keyphrases", $list);
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| 106 |
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| 107 | # add individual key phrases as multiple metadata
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| 108 | foreach my $keyphrase (split(',', $list)) {
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| 109 | $keyphrase =~ s/^\s+|\s+$//g;
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| 110 | $doc_obj->add_metadata($thissection, "Keyphrase", $keyphrase);
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| 111 | }
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| 112 | }
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| 113 | }
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| 114 |
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| 115 | 1;
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