[4726] | 1 | ###########################################################################
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| 2 | #
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| 3 | # OAIPlug.pm -- basic Open Archives Initiative (OAI) plugin
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| 4 | #
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| 5 | # A component of the Greenstone digital library software
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| 6 | # from the New Zealand Digital Library Project at the
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| 7 | # University of Waikato, New Zealand.
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| 8 | #
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| 9 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 10 | #
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| 11 | # This program is free software; you can redistribute it and/or modify
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| 12 | # it under the terms of the GNU General Public License as published by
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| 13 | # the Free Software Foundation; either version 2 of the License, or
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| 14 | # (at your option) any later version.
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| 15 | #
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| 16 | # This program is distributed in the hope that it will be useful,
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| 17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | # GNU General Public License for more details.
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| 20 | #
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| 21 | # You should have received a copy of the GNU General Public License
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| 22 | # along with this program; if not, write to the Free Software
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| 23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 24 | #
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| 25 | ###########################################################################
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| 26 |
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[15872] | 27 | package OAIPlugin;
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[4726] | 28 |
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| 29 | use unicode;
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| 30 | use util;
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| 31 |
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[10254] | 32 | use strict;
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| 33 | no strict 'refs'; # allow filehandles to be variables and viceversa
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| 34 |
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[15872] | 35 | use ReadXMLFile;
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[9958] | 36 |
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[4726] | 37 | sub BEGIN {
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[15872] | 38 | @OAIPlugin::ISA = ('ReadXMLFile');
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[4726] | 39 | }
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| 40 |
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[9958] | 41 |
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[6408] | 42 | my $arguments =
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| 43 | [ { 'name' => "process_exp",
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[16013] | 44 | 'desc' => "{BasePlugin.process_exp}",
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[6408] | 45 | 'type' => "regexp",
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| 46 | 'reqd' => "no",
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| 47 | 'deft' => &get_default_process_exp() },
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| 48 | ];
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| 49 |
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[15872] | 50 | my $options = { 'name' => "OAIPlugin",
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| 51 | 'desc' => "{OAIPlugin.desc}",
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[6408] | 52 | 'abstract' => "no",
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| 53 | 'inherits' => "yes",
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| 54 | 'args' => $arguments };
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[4747] | 55 |
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[10254] | 56 |
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[4726] | 57 | sub new {
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[10218] | 58 | my ($class) = shift (@_);
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| 59 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 60 | push(@$pluginlist, $class);
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[4873] | 61 |
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[15872] | 62 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 63 | push(@{$hashArgOptLists->{"OptList"}},$options);
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[4726] | 64 |
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[15872] | 65 | my $self = new ReadXMLFile($pluginlist, $inputargs, $hashArgOptLists);
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[4726] | 66 |
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| 67 | return bless $self, $class;
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| 68 | }
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| 69 |
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| 70 | sub get_default_process_exp {
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| 71 | my $self = shift (@_);
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| 72 |
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| 73 | return q^(?i)(\.oai)$^;
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| 74 | }
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| 75 |
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[13222] | 76 | sub get_doctype {
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| 77 | my $self = shift(@_);
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| 78 |
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| 79 | return "OAI-PMH";
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| 80 | }
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| 81 |
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[9958] | 82 | sub xml_start_document {
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[10254] | 83 | my $self = shift (@_);
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[9958] | 84 | $self->{'in_metadata_node'} = 0;
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| 85 | $self->{'rawxml'} = "";
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| 86 | }
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[4726] | 87 |
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[9958] | 88 | sub xml_end_document {
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| 89 | }
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[4726] | 90 |
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[9958] | 91 | sub xml_doctype {
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| 92 | my $self = shift(@_);
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| 93 |
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| 94 | my ($expat, $name, $sysid, $pubid, $internal) = @_;
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| 95 |
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[13886] | 96 | ##die "" if ($name !~ /^OAI-PMH$/);
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[9958] | 97 |
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[4726] | 98 | my $outhandle = $self->{'outhandle'};
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[15872] | 99 | print $outhandle "OAIPlugin: processing $self->{'file'}\n" if $self->{'verbosity'} > 1;
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| 100 | print STDERR "<Processing n='$self->{'file'}' p='OAIPlugin'>\n" if $self->{'gli'};
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[4726] | 101 |
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[9958] | 102 | }
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[4726] | 103 |
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[9958] | 104 |
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| 105 | sub xml_start_tag {
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| 106 | my $self = shift(@_);
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| 107 | my ($expat,$element) = @_;
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| 108 |
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| 109 | my %attr_hash = %_;
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| 110 |
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| 111 | my $attr = "";
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| 112 | map { $attr .= " $_=$attr_hash{$_}"; } keys %attr_hash;
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| 113 |
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| 114 | $self->{'rawxml'} .= "<$element$attr>";
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| 115 |
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| 116 | if ($element eq "metadata") {
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| 117 | $self->{'in_metadata_node'} = 1;
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| 118 | $self->{'metadata_xml'} = "";
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[4726] | 119 | }
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[9958] | 120 |
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| 121 | if ($self->{'in_metadata_node'}) {
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| 122 | $self->{'metadata_xml'} .= "<$element$attr>";
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[4726] | 123 | }
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[9958] | 124 | }
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[4726] | 125 |
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[9958] | 126 | sub xml_end_tag {
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| 127 | my $self = shift(@_);
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| 128 | my ($expat, $element) = @_;
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[4726] | 129 |
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[9958] | 130 | $self->{'rawxml'} .= "</$element>";
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[4726] | 131 |
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[9958] | 132 | if ($self->{'in_metadata_node'}) {
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| 133 | $self->{'metadata_xml'} .= "</$element>";
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[4726] | 134 | }
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| 135 |
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[9958] | 136 | if ($element eq "metadata") {
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| 137 | my $textref = \$self->{'metadata_xml'};
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| 138 | my $metadata = $self->{'metadata'};
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| 139 | $self->extract_oai_metadata($textref,$metadata);
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[4726] | 140 |
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[9958] | 141 | $self->{'in_metadata_node'} = 0;
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| 142 | }
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[4726] | 143 |
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| 144 |
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[9958] | 145 | }
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[4726] | 146 |
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[9958] | 147 | sub xml_text {
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| 148 | my $self = shift(@_);
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| 149 | my ($expat) = @_;
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[8684] | 150 |
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[9958] | 151 | $self->{'rawxml'} .= $_;
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[4726] | 152 |
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[9958] | 153 | if ($self->{'in_metadata_node'}) {
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| 154 | $self->{'metadata_xml'} .= $_;
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[4726] | 155 | }
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[9958] | 156 | }
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[4726] | 157 |
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[8121] | 158 |
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[4726] | 159 |
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[5919] | 160 |
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[9958] | 161 | sub read {
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| 162 | my $self = shift (@_);
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| 163 |
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[16392] | 164 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
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[4726] | 165 |
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[9958] | 166 | my $outhandle = $self->{'outhandle'};
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[4726] | 167 |
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[9958] | 168 | my $filename = $file;
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| 169 | $filename = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\w/;
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[4726] | 170 |
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[9958] | 171 | return 0 if ((-d $filename) && ($filename =~ m/srcdocs$/));
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[4726] | 172 |
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[9958] | 173 | if ($self->SUPER::read(@_)) {
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| 174 |
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| 175 | # Do encoding stuff
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| 176 | my ($language, $encoding) = $self->textcat_get_language_encoding ($filename);
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| 177 |
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| 178 | my $url_array = $metadata->{'URL'};
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[10254] | 179 | my $num_urls = (defined $url_array) ? scalar(@$url_array) : 0;
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[9958] | 180 |
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| 181 | my $srcdoc_exists = 0;
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| 182 | my $srcdoc_pos = 0;
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| 183 | my $filename_dir = &util::filename_head($filename);
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| 184 |
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| 185 | for (my $i=0; $i<$num_urls; $i++) {
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| 186 |
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| 187 | if ($url_array->[$i] !~ m/^(http|ftp):/) {
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| 188 |
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| 189 | my $src_filename = &util::filename_cat($filename_dir, $url_array->[$i]);
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| 190 |
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| 191 | if (-e $src_filename) {
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| 192 | $srcdoc_pos = $i;
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| 193 | $srcdoc_exists = 1;
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| 194 | }
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| 195 | }
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| 196 | }
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| 197 |
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| 198 | if ($srcdoc_exists)
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| 199 | {
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[15872] | 200 | print $outhandle "OAIPlugin: passing metadata on to $url_array->[0]\n"
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[9958] | 201 | if ($self->{'verbosity'}>1);
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| 202 |
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| 203 |
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| 204 | # Make pretty print metadata table stick with src filename
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| 205 | my $ppmd_table = $self->{'ppmd_table'};
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| 206 | $metadata->{'prettymd'} = [ $ppmd_table ];
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| 207 | $self->{'ppmd_table'} = undef;
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| 208 |
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| 209 | return &plugin::read ($pluginfo, $filename_dir, $url_array->[0],
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[16392] | 210 | $block_hash, $metadata, $processor, $maxdocs,
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| 211 | $total_count, $gli);
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[9958] | 212 | }
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| 213 | else
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| 214 | {
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| 215 | # create a new document
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| 216 | my $doc_obj = new doc ($filename, "indexed_doc");
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| 217 | my $top_section = $doc_obj->get_top_section;
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| 218 | my $plugin_type = $self->{'plugin_type'};
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| 219 |
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| 220 | $doc_obj->add_utf8_metadata($top_section, "Language", $language);
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| 221 | $doc_obj->add_utf8_metadata($top_section, "Encoding", $encoding);
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| 222 | $doc_obj->add_utf8_metadata($top_section, "Plugin", $plugin_type);
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| 223 | $doc_obj->add_metadata($top_section, "FileFormat", "OAI");
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| 224 | $doc_obj->add_metadata($top_section, "FileSize", (-s $filename));
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| 225 |
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| 226 | # include any metadata passed in from previous plugins
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| 227 | # note that this metadata is associated with the top level section
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| 228 | $self->extra_metadata ($doc_obj, $doc_obj->get_top_section(), $metadata);
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| 229 |
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| 230 | # do plugin specific processing of doc_obj
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| 231 | my $textref = \$self->{'rawxml'};
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| 232 | unless (defined ($self->process($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj))) {
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| 233 | print STDERR "<ProcessingError n='$file'>\n" if ($gli);
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| 234 | return -1;
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| 235 | }
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| 236 |
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| 237 | # do any automatic metadata extraction
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| 238 | $self->auto_extract_metadata ($doc_obj);
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| 239 |
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| 240 | # add an OID
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| 241 | $doc_obj->set_OID();
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| 242 |
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| 243 | my $ppmd_table = $self->{'ppmd_table'};
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| 244 | $doc_obj->add_utf8_metadata($top_section,"prettymd",$ppmd_table);
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| 245 | $self->{'ppmd_table'} = undef;
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| 246 |
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| 247 | # process the document
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| 248 | $processor->process($doc_obj);
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| 249 |
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| 250 | $self->{'num_processed'} ++;
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| 251 |
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| 252 | return 1; # processed the file
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| 253 | }
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[4726] | 254 | }
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[9958] | 255 | else {
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| 256 | return undef;
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| 257 | }
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[4726] | 258 | }
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| 259 |
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| 260 |
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| 261 | # do plugin specific processing of doc_obj
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| 262 | sub process {
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| 263 | my $self = shift (@_);
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[6332] | 264 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
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[4726] | 265 | my $outhandle = $self->{'outhandle'};
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| 266 |
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[15872] | 267 | print STDERR "<Processing n='$file' p='OAIPlugin'>\n" if ($gli);
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| 268 | print $outhandle "OAIPlugin: processing $file\n"
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[4726] | 269 | if $self->{'verbosity'} > 1;
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| 270 |
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| 271 | my $cursection = $doc_obj->get_top_section();
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| 272 |
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| 273 | ## $self->extract_metadata ($textref, $metadata, $doc_obj, $cursection);
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| 274 |
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| 275 | # add text to document object
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| 276 |
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| 277 | # $$textref =~ s/<(.*?)>/$1 /g;
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| 278 | $$textref =~ s/</</g;
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| 279 | $$textref =~ s/>/>/g;
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[14963] | 280 | $$textref =~ s/\[/[/g;
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| 281 | $$textref =~ s/\]/]/g;
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[4726] | 282 |
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| 283 | ## print STDERR "*** adding text: $$textref\n";
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| 284 |
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| 285 | $doc_obj->add_utf8_text($cursection, $$textref);
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| 286 |
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| 287 | return 1;
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| 288 | }
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| 289 |
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| 290 |
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[9958] | 291 | # Improvement is to merge this with newer version in MetadataPass
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[4726] | 292 |
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[9958] | 293 | sub open_prettyprint_metadata_table
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| 294 | {
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| 295 | my $self = shift(@_);
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| 296 |
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| 297 | my $att = "width=100% cellspacing=2";
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| 298 | my $style = "style=\'border-bottom: 4px solid #000080\'";
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| 299 |
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| 300 | $self->{'ppmd_table'} = "\n<table $att $style>";
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| 301 | }
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| 302 |
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| 303 | sub add_prettyprint_metadata_line
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| 304 | {
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| 305 | my $self = shift(@_);
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| 306 | my ($metaname, $metavalue_utf8) = @_;
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| 307 |
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[14949] | 308 | ### $metavalue_utf8 =~ s/hdl\.handle\.net/mcgonagall.cs.waikato.ac.nz:8080\/dspace\/handle/;
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[9958] | 309 | $metavalue_utf8 = &util::hyperlink_text($metavalue_utf8);
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| 310 |
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| 311 | $self->{'ppmd_table'} .= " <tr bgcolor=#b5d3cd>\n";
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| 312 | $self->{'ppmd_table'} .= " <td width=30%>\n";
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| 313 | $self->{'ppmd_table'} .= " $metaname\n";
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| 314 | $self->{'ppmd_table'} .= " </td>\n";
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| 315 | $self->{'ppmd_table'} .= " <td>\n";
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| 316 | $self->{'ppmd_table'} .= " $metavalue_utf8\n";
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| 317 | $self->{'ppmd_table'} .= " </td>\n";
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| 318 | $self->{'ppmd_table'} .= " </tr>\n";
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| 319 |
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| 320 | }
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| 321 |
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| 322 | sub close_prettyprint_metadata_table
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| 323 | {
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| 324 | my $self = shift(@_);
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| 325 |
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| 326 | $self->{'ppmd_table'} .= "</table>\n";
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| 327 | }
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| 328 |
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| 329 |
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[14940] | 330 | sub remap_dcterms_metadata
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| 331 | {
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| 332 | my $self = shift(@_);
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[9958] | 333 |
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[14940] | 334 | my ($metaname) = @_;
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[9958] | 335 |
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[14940] | 336 | my $dcterm_mapping = {
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| 337 | "alternative" => "dc.title",
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| 338 | "tableOfContents" => "dc.description",
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| 339 | "abstract" => "dc.description",
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| 340 | "created" => "dc.date",
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| 341 | "valid" => "dc.date",
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| 342 | "available" => "dc.date",
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| 343 | "issued" => "dc.date",
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| 344 | "modified" => "dc.date",
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| 345 | "dateAccepted" => "dc.date",
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| 346 | "dateCopyrighted" => "dc.date",
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| 347 | "dateSubmitted" => "dc.date",
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| 348 | "extent" => "dc.format",
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| 349 | "medium" => "dc.format",
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| 350 | "isVersionOf" => "dc.relation",
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| 351 | "hasVersion" => "dc.relation",
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| 352 | "isReplacedBy" => "dc.relation",
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| 353 | "replaces" => "dc.relation",
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| 354 | "isRequiredBy" => "dc.relation",
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| 355 | "requires" => "dc.relation",
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| 356 | "isPartOf" => "dc.relation",
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| 357 | "hasPart" => "dc.relation",
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| 358 | "isReferencedBy" => "dc.relation",
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| 359 | "references" => "dc.relation",
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| 360 | "isFormatOf" => "dc.relation",
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| 361 | "hasFormat" => "dc.relation",
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| 362 | "conformsTo" => "dc.relation",
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| 363 | "spatial" => "dc.coverage",
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| 364 | "temporal" => "dc.coverage",
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| 365 | "audience" => "dc.any",
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| 366 | "accrualMethod" => "dc.any",
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| 367 | "accrualPeriodicity" => "dc.any",
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| 368 | "accrualPolicy" => "dc.any",
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| 369 | "instructionalMethod" => "dc.any",
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| 370 | "provenance" => "dc.any",
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| 371 | "rightsHolder" => "dc.any",
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| 372 | "mediator" => "audience",
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| 373 | "educationLevel" => "audience",
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| 374 | "accessRights" => "dc.rights",
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| 375 | "license" => "dc.rights",
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| 376 | "bibliographicCitation" => "dc.identifier"
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| 377 | };
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| 378 |
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| 379 | my ($prefix,$name) = ($metaname =~ m/^(.*?)\.(.*?)$/);
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| 380 |
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| 381 | if ($prefix eq "dcterms")
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| 382 | {
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| 383 | if (defined $dcterm_mapping->{$name})
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| 384 | {
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| 385 | return $dcterm_mapping->{$name}."^".$name;
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| 386 | }
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| 387 |
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| 388 | }
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| 389 | return $metaname; # didn't get a match, return param passed in unchanged
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| 390 | }
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| 391 |
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| 392 |
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[4726] | 393 | sub extract_oai_metadata {
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| 394 | my $self = shift (@_);
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| 395 | my ($textref, $metadata) = @_;
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| 396 | my $outhandle = $self->{'outhandle'};
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| 397 |
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[9958] | 398 | # Only handles DC metadata
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| 399 |
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| 400 | $self->open_prettyprint_metadata_table();
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| 401 |
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| 402 | if ($$textref =~ m/<metadata\s*>(.*?)<\/metadata\s*>/s)
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[4726] | 403 | {
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[10254] | 404 | my $metadata_text = $1;
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[4726] | 405 |
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[14940] | 406 | # locate and remove outermost tag (ignoring any attribute information in top-level tag)
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| 407 | my ($wrapper_metadata_xml,$inner_metadata_text) = ($metadata_text =~ m/<([^ >]+).*?>(.*?)<\/\1>/s);
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| 408 |
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| 409 | # split tag into namespace and tag name
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| 410 | my($namespace,$top_level_prefix) = ($wrapper_metadata_xml =~ m/^(.*?):(.*?)$/);
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| 411 |
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| 412 | if ($top_level_prefix !~ /dc$/) {
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[15872] | 413 | print $outhandle "Warning: OAIPlugin currently only designed for Dublin Core (or variant) metadata\n";
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[14940] | 414 | print $outhandle " This recorded metadata section '$top_level_prefix' does not appear to match.\n";
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| 415 | print $outhandle " Metadata assumed to be in form: <prefix:tag>value</prefix:tag> and will be converted\n";
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| 416 | print $outhandle " into Greenstone metadata as prefix.tag = value\n";
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| 417 | }
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| 418 |
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[14949] | 419 | while ($inner_metadata_text =~ m/<([^ >]+).*?>(.*?)<\/\1>(.*)/s)
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[4726] | 420 | {
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| 421 | # if URL given for document as identifier metadata, store it ...
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| 422 | # $doc_obj->add_utf8_metadata($cursection, "URL", $web_url);
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[9958] | 423 |
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[4726] | 424 | my $metaname = $1;
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| 425 | my $metavalue = $2;
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[14949] | 426 | $inner_metadata_text = $3;
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| 427 |
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| 428 | # print STDERR "*** metaname = $metaname\n";
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| 429 | # print STDERR "*** metavalue = $metavalue\n";
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| 430 |
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[14940] | 431 | # $metaname =~ s/^(dc:)?(.)/\u$2/; # strip of optional prefix and uppercase first letter
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| 432 | $metaname =~ s/:/\./;
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| 433 | if ($metaname !~ m/\./)
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[4726] | 434 | {
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[14940] | 435 | $metaname = "$top_level_prefix.$metaname";
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[4726] | 436 | }
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[14963] | 437 | $metaname =~ s/\.(.)/\.\u$1/;
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[4726] | 438 |
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[14940] | 439 | $metaname = $self->remap_dcterms_metadata($metaname);
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| 440 |
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[14963] | 441 | $metavalue =~ s/\[/[/g;
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| 442 | $metavalue =~ s/\]/]/g;
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| 443 |
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| 444 |
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[14940] | 445 | # if ($metaname eq "Identifier")
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| 446 | # {
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| 447 | # # name clashes with GSDL reserved metadata name for hash id
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| 448 | # $metaname = "URL";
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| 449 | # }
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| 450 |
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[4726] | 451 | if (defined $metadata->{$metaname})
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| 452 | {
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| 453 | push(@{$metadata->{$metaname}},$metavalue);
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[8121] | 454 |
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[4726] | 455 | }
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| 456 | else
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| 457 | {
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| 458 | $metadata->{$metaname} = [ $metavalue ];
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| 459 | }
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| 460 |
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[9958] | 461 | $self->add_prettyprint_metadata_line($metaname, $metavalue);
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| 462 |
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[4726] | 463 | }
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| 464 | }
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[9958] | 465 |
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| 466 | $self->close_prettyprint_metadata_table();
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[4726] | 467 | }
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| 468 |
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[13886] | 469 | ## we know from the file extension, so doesn't need to check the doctype
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| 470 | sub check_doctype {
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| 471 |
|
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| 472 | return 1;
|
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| 473 | }
|
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| 474 |
|
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[4726] | 475 | 1;
|
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