| 1 | ###########################################################################
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| 2 | #
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| 3 | # basebuildproc.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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| 26 | # This document processor outputs a document for indexing (should be
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| 27 | # implemented by subclass) and storing in gdbm database
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| 28 |
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| 29 | package basebuildproc;
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| 30 |
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| 31 | eval {require bytes};
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| 32 |
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| 33 | use classify;
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| 34 | use doc;
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| 35 | use docproc;
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| 36 | use util;
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| 37 |
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| 38 | BEGIN {
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| 39 | @basebuildproc::ISA = ('docproc');
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| 40 | }
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| 41 |
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| 42 | sub new {
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| 43 | my ($class, $collection, $source_dir, $build_dir,
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| 44 | $verbosity, $outhandle) = @_;
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| 45 | my $self = new docproc ();
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| 46 |
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| 47 | # outhandle is where all the debugging info goes
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| 48 | # output_handle is where the output of the plugins is piped
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| 49 | # to (i.e. mg, gdbm etc.)
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| 50 | $outhandle = STDERR unless defined $outhandle;
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| 51 |
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| 52 | $self->{'collection'} = $collection;
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| 53 | $self->{'source_dir'} = $source_dir;
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| 54 | $self->{'build_dir'} = $build_dir;
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| 55 | $self->{'verbosity'} = $verbosity;
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| 56 | $self->{'outhandle'} = $outhandle;
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| 57 |
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| 58 | $self->{'classifiers'} = [];
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| 59 | $self->{'mode'} = "text";
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| 60 | $self->{'assocdir'} = $build_dir;
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| 61 | $self->{'dontgdbm'} = {};
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| 62 |
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| 63 | $self->{'index'} = "section:text";
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| 64 | $self->{'indexexparr'} = [];
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| 65 |
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| 66 | $self->{'output_handle'} = "STDOUT";
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| 67 | $self->{'num_docs'} = 0;
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| 68 | $self->{'num_sections'} = 0;
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| 69 | $self->{'num_bytes'} = 0;
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| 70 | $self->{'num_processed_bytes'} = 0;
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| 71 | $self->{'store_text'} = 1;
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| 72 |
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| 73 | # what level (section/document) the gdbm database - indexer intersection is
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| 74 | $self->{'gdbm_level'} = "section";
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| 75 | #used by browse interface
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| 76 | $self->{'doclist'} = [];
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| 77 |
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| 78 | $self->{'indexing_text'} = 0;
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| 79 |
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| 80 | return bless $self, $class;
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| 81 |
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| 82 | }
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| 83 |
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| 84 | sub reset {
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| 85 | my $self = shift (@_);
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| 86 |
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| 87 | $self->{'num_docs'} = 0;
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| 88 | $self->{'num_sections'} = 0;
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| 89 | $self->{'num_processed_bytes'} = 0;
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| 90 | $self->{'num_bytes'} = 0;
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| 91 | }
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| 92 |
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| 93 | sub get_num_docs {
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| 94 | my $self = shift (@_);
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| 95 |
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| 96 | return $self->{'num_docs'};
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| 97 | }
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| 98 |
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| 99 | sub get_num_sections {
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| 100 | my $self = shift (@_);
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| 101 |
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| 102 | return $self->{'num_sections'};
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| 103 | }
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| 104 |
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| 105 | # num_bytes is the actual number of bytes in the collection
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| 106 | # this is normally the same as what's processed during text compression
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| 107 | sub get_num_bytes {
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| 108 | my $self = shift (@_);
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| 109 |
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| 110 | return $self->{'num_bytes'};
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| 111 | }
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| 112 |
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| 113 | # num_processed_bytes is the number of bytes actually passed
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| 114 | # to mg for the current index
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| 115 | sub get_num_processed_bytes {
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| 116 | my $self = shift (@_);
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| 117 |
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| 118 | return $self->{'num_processed_bytes'};
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| 119 | }
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| 120 |
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| 121 | sub set_output_handle {
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| 122 | my $self = shift (@_);
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| 123 | my ($handle) = @_;
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| 124 |
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| 125 | $self->{'output_handle'} = $handle;
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| 126 | }
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| 127 |
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| 128 |
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| 129 | sub set_mode {
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| 130 | my $self = shift (@_);
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| 131 | my ($mode) = @_;
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| 132 |
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| 133 | $self->{'mode'} = $mode;
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| 134 | }
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| 135 |
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| 136 | sub set_assocdir {
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| 137 | my $self = shift (@_);
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| 138 | my ($assocdir) = @_;
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| 139 |
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| 140 | $self->{'assocdir'} = $assocdir;
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| 141 | }
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| 142 |
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| 143 | sub set_dontgdbm {
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| 144 | my $self = shift (@_);
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| 145 | my ($dontgdbm) = @_;
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| 146 |
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| 147 | $self->{'dontgdbm'} = $dontgdbm;
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| 148 | }
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| 149 |
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| 150 | sub set_index {
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| 151 | my $self = shift (@_);
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| 152 | my ($index, $indexexparr) = @_;
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| 153 |
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| 154 | $self->{'index'} = $index;
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| 155 | $self->{'indexexparr'} = $indexexparr if defined $indexexparr;
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| 156 | }
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| 157 |
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| 158 | sub set_index_languages {
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| 159 | my $self = shift (@_);
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| 160 | my ($lang_meta, $langarr) = @_;
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| 161 | $self->{'lang_meta'} = $lang_meta;
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| 162 | $self->{'langarr'} = $langarr;
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| 163 | }
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| 164 |
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| 165 | sub get_index {
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| 166 | my $self = shift (@_);
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| 167 |
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| 168 | return $self->{'index'};
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| 169 | }
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| 170 |
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| 171 | sub set_classifiers {
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| 172 | my $self = shift (@_);
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| 173 | my ($classifiers) = @_;
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| 174 |
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| 175 | $self->{'classifiers'} = $classifiers;
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| 176 | }
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| 177 |
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| 178 | sub set_indexing_text {
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| 179 | my $self = shift (@_);
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| 180 | my ($indexing_text) = @_;
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| 181 |
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| 182 | $self->{'indexing_text'} = $indexing_text;
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| 183 | }
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| 184 |
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| 185 | sub get_indexing_text {
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| 186 | my $self = shift (@_);
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| 187 |
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| 188 | return $self->{'indexing_text'};
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| 189 | }
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| 190 |
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| 191 | sub set_store_text {
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| 192 | my $self = shift (@_);
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| 193 | my ($store_text) = @_;
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| 194 |
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| 195 | $self->{'store_text'} = $store_text;
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| 196 | }
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| 197 | sub get_doc_list {
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| 198 | my $self = shift(@_);
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| 199 |
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| 200 | return @{$self->{'doclist'}};
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| 201 | }
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| 202 |
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| 203 | # the standard gdbm level is section, but you may want to change it to document
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| 204 | sub set_gdbm_level {
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| 205 | my $self= shift (@_);
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| 206 | my ($gdbm_level) = @_;
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| 207 |
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| 208 | $self->{'gdbm_level'} = $gdbm_level;
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| 209 | }
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| 210 |
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| 211 | sub process {
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| 212 | my $self = shift (@_);
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| 213 | my $method = $self->{'mode'};
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| 214 |
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| 215 | $self->$method(@_);
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| 216 | }
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| 217 |
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| 218 | sub infodb {
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| 219 | my $self = shift (@_);
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| 220 | my ($doc_obj, $filename) = @_;
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| 221 | my $handle = $self->{'output_handle'};
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| 222 |
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| 223 | my $doctype = $doc_obj->get_doc_type();
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| 224 |
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| 225 | # only output this document if it is one to be indexed
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| 226 | return if ($doctype ne "indexed_doc");
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| 227 |
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| 228 | my ($archivedir) = $filename =~ /^(.*?)(?:\/|\\)[^\/\\]*$/;
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| 229 | $archivedir = "" unless defined $archivedir;
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| 230 | $archivedir =~ s/\\/\//g;
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| 231 | $archivedir =~ s/^\/+//;
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| 232 | $archivedir =~ s/\/+$//;
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| 233 |
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| 234 | # resolve the final filenames of the files associated with this document
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| 235 | $self->assoc_files ($doc_obj, $archivedir);
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| 236 |
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| 237 | #GRB: moved 1/06/2004 from GRB01062004
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| 238 | #add this document to the browse structure
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| 239 | push(@{$self->{'doclist'}},$doc_obj->get_OID())
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| 240 | unless ($doctype eq "classification");
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| 241 |
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| 242 | # classify this document
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| 243 | &classify::classify_doc ($self->{'classifiers'}, $doc_obj);
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| 244 | #GRB: end of moved block
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| 245 |
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| 246 | # this is another document
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| 247 | $self->{'num_docs'} += 1 unless ($doctype eq "classification");
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| 248 |
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| 249 | # is this a paged or a hierarchical document
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| 250 | my ($thistype, $childtype) = $self->get_document_type ($doc_obj);
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| 251 |
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| 252 | my $section = $doc_obj->get_top_section ();
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| 253 | my $doc_OID = $doc_obj->get_OID();
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| 254 | my $first = 1;
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| 255 | my $url = "";
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| 256 | while (defined $section) {
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| 257 | # update a few statistics
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| 258 | $self->{'num_bytes'} += $doc_obj->get_text_length ($section);
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| 259 | $self->{'num_sections'} += 1 unless ($doctype eq "classification");
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| 260 |
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| 261 | # output the section name
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| 262 | if ($section eq "") { print $handle "[$doc_OID]\n"; }
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| 263 | else { print $handle "[$doc_OID.$section]\n"; }
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| 264 |
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| 265 | # output the fact that this document is a document (unless doctype
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| 266 | # has been set to something else from within a plugin
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| 267 | my $dtype = $doc_obj->get_metadata_element ($section, "doctype");
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| 268 | if (!defined $dtype || $dtype !~ /\w/) {
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| 269 | print $handle "<doctype>doc\n";
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| 270 | }
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| 271 |
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| 272 | # output whether this node contains text
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| 273 | if ($doc_obj->get_text_length($section) > 0) {
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| 274 | print $handle "<hastxt>1\n";
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| 275 | } else {
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| 276 | print $handle "<hastxt>0\n";
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| 277 | }
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| 278 |
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| 279 | # output all the section metadata
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| 280 | my $metadata = $doc_obj->get_all_metadata ($section);
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| 281 | foreach my $pair (@$metadata) {
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| 282 | my ($field, $value) = (@$pair);
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| 283 |
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| 284 | if ($field ne "Identifier" && $field !~ /^gsdl/ &&
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| 285 | defined $value && $value ne "") {
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| 286 |
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| 287 | # escape problematic stuff
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| 288 | $value =~ s/\\/\\\\/g;
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| 289 | $value =~ s/\n/\\n/g;
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| 290 | $value =~ s/\r/\\r/g;
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| 291 | if ($value =~ /-{70,}/) {
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| 292 | # if value contains 70 or more hyphens in a row we need
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| 293 | # to escape them to prevent txt2db from treating them
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| 294 | # as a separator
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| 295 | $value =~ s/-/&\#045;/gi;
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| 296 | }
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| 297 |
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| 298 | # special case for URL metadata
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| 299 | if ($field =~ /^URL$/i) {
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| 300 | $url .= "[$value]\n";
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| 301 | if ($section eq "") {$url .= "<section>$doc_OID\n";}
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| 302 | else {$url .= "<section>$doc_OID.$section\n";}
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| 303 | $url .= '-' x 70 . "\n";
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| 304 | }
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| 305 |
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| 306 | if (!defined $self->{'dontgdbm'}->{$field}) {
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| 307 | print $handle "<$field>$value\n";
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| 308 | }
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| 309 | }
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| 310 | }
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| 311 |
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| 312 | # output archivedir if at top level
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| 313 | if ($section eq $doc_obj->get_top_section()) {
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| 314 | print $handle "<archivedir>$archivedir\n";
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| 315 | }
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| 316 |
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| 317 | # output document display type
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| 318 | if ($first) {
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| 319 | print $handle "<thistype>$thistype\n";
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| 320 | }
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| 321 |
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| 322 | if ($self->{'gdbm_level'} eq "document") {
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| 323 | # doc num is num_docs not num_sections
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| 324 | # output the matching document number
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| 325 | print $handle "<docnum>$self->{'num_docs'}\n";
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| 326 | } else {
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| 327 | # output a list of children
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| 328 | my $children = $doc_obj->get_children ($section);
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| 329 | if (scalar(@$children) > 0) {
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| 330 | print $handle "<childtype>$childtype\n";
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| 331 | print $handle "<contains>";
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| 332 | my $firstchild = 1;
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| 333 | foreach my $child (@$children) {
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| 334 | print $handle ";" unless $firstchild;
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| 335 | $firstchild = 0;
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| 336 | if ($child =~ /^.*?\.(\d+)$/) {
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| 337 | print $handle "\".$1";
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| 338 | } else {
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| 339 | print $handle "\".$child";
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| 340 | }
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| 341 | # if ($child eq "") { print $handle "$doc_OID"; }
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| 342 | # elsif ($section eq "") { print $handle "$doc_OID.$child"; }
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| 343 | # else { print $handle "$doc_OID.$section.$child"; }
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| 344 | }
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| 345 | print $handle "\n";
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| 346 | }
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| 347 | #output the matching doc number
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| 348 | print $handle "<docnum>$self->{'num_sections'}\n";
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| 349 |
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| 350 | }
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| 351 |
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| 352 | print $handle '-' x 70, "\n";
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| 353 |
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| 354 |
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| 355 | # output a database entry for the document number
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| 356 | if ($self->{'gdbm_level'} eq "document") {
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| 357 | print $handle "[$self->{'num_docs'}]\n";
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| 358 | print $handle "<section>$doc_OID\n";
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| 359 | }
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| 360 | else {
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| 361 | print $handle "[$self->{'num_sections'}]\n";
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| 362 | if ($section eq "") { print $handle "<section>$doc_OID\n"; }
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| 363 | else { print $handle "<section>$doc_OID.$section\n"; }
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| 364 | }
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| 365 | print $handle '-' x 70, "\n";
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| 366 |
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| 367 | # output entry for url
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| 368 | if ($url ne "") {
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| 369 | print $handle $url;
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| 370 | }
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| 371 |
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| 372 | $first = 0;
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| 373 | $section = $doc_obj->get_next_section($section);
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| 374 | last if ($self->{'gdbm_level'} eq "document"); # if no sections wanted, only gdbm the docs
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| 375 | }
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| 376 |
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| 377 | #GRB01062004: see code above moved from here
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| 378 | }
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| 379 |
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| 380 |
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| 381 | sub text {
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| 382 | my $self = shift (@_);
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| 383 | my ($doc_obj) = @_;
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| 384 |
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| 385 | my $handle = $self->{'outhandle'};
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| 386 | print $handle "basebuildproc::text function must be implemented in sub classes\n";
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| 387 | die "\n";
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| 388 | }
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| 389 |
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| 390 | # should the document be indexed - according to the subcollection and language
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| 391 | # specification.
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| 392 | sub is_subcollection_doc {
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| 393 | my $self = shift (@_);
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| 394 | my ($doc_obj) = @_;
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| 395 |
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| 396 | my $indexed_doc = 1;
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| 397 | foreach my $indexexp (@{$self->{'indexexparr'}}) {
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| 398 | $indexed_doc = 0;
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| 399 | my ($field, $exp, $options) = split /\//, $indexexp;
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| 400 | if (defined ($field) && defined ($exp)) {
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| 401 | my ($bool) = $field =~ /^(.)/;
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| 402 | $field =~ s/^.// if $bool eq '!';
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| 403 | if ($field =~ /^filename$/i) {
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| 404 | $field = $doc_obj->get_source_filename();
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| 405 | } else {
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| 406 | $field = $doc_obj->get_metadata_element($doc_obj->get_top_section(), $field);
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| 407 | }
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| 408 | next unless defined $field;
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| 409 | if ($bool eq '!') {
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| 410 | if ($options =~ /^i$/i) {
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| 411 | if ($field !~ /$exp/i) {$indexed_doc = 1; last;}
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| 412 | } else {
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| 413 | if ($field !~ /$exp/) {$indexed_doc = 1; last;}
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| 414 | }
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| 415 | } else {
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| 416 | if ($options =~ /^i$/i) {
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| 417 | if ($field =~ /$exp/i) {$indexed_doc = 1; last;}
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| 418 | } else {
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| 419 | if ($field =~ /$exp/) {$indexed_doc = 1; last;}
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| 420 | }
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| 421 | }
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| 422 | }
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| 423 | }
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| 424 |
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| 425 | # if this doc is so far in the sub collection, and we have lang info,
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| 426 | # now we check the languages to see if it matches
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| 427 | if($indexed_doc && defined $self->{'lang_meta'}) {
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| 428 | $indexed_doc = 0;
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| 429 | my $field = $doc_obj->get_metadata_element($doc_obj->get_top_section(), $self->{'lang_meta'});
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| 430 | if (defined $field) {
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| 431 | foreach my $lang (@{$self->{'langarr'}}) {
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| 432 | my ($bool) = $lang =~ /^(.)/;
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| 433 | if ($bool eq '!') {
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| 434 | $lang =~ s/^.//;
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| 435 | if ($field !~ /$lang/) {
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| 436 | $indexed_doc = 1; last;
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| 437 | }
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| 438 | } else {
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| 439 | if ($field =~ /$lang/) {
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| 440 | $indexed_doc = 1; last;
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| 441 | }
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| 442 | }
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| 443 | }
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| 444 | }
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| 445 | }
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| 446 | return $indexed_doc;
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| 447 |
|
|---|
| 448 | }
|
|---|
| 449 |
|
|---|
| 450 | # use 'Paged' if document has no more than 2 levels
|
|---|
| 451 | # and each section at second level has a number for
|
|---|
| 452 | # Title metadata
|
|---|
| 453 | # also use Paged if gsdlthistype metadata is set to Paged
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|---|
| 454 | sub get_document_type {
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| 455 | my $self = shift (@_);
|
|---|
| 456 | my ($doc_obj) = @_;
|
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| 457 |
|
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| 458 | my $thistype = "VList";
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|---|
| 459 | my $childtype = "VList";
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| 460 | my $title;
|
|---|
| 461 | my @tmp = ();
|
|---|
| 462 |
|
|---|
| 463 | my $section = $doc_obj->get_top_section ();
|
|---|
| 464 |
|
|---|
| 465 | my $gsdlthistype = $doc_obj->get_metadata_element ($section, "gsdlthistype");
|
|---|
| 466 | if (defined $gsdlthistype) {
|
|---|
| 467 | if ($gsdlthistype eq "Paged") {
|
|---|
| 468 | $childtype = "Paged";
|
|---|
| 469 | if ($doc_obj->get_text_length ($doc_obj->get_top_section())) {
|
|---|
| 470 | $thistype = "Paged";
|
|---|
| 471 | } else {
|
|---|
| 472 | $thistype = "Invisible";
|
|---|
| 473 | }
|
|---|
| 474 |
|
|---|
| 475 | return ($thistype, $childtype);
|
|---|
| 476 | } elsif ($gsdlthistype eq "Hierarchy") {
|
|---|
| 477 | return ($thistype, $childtype); # use VList, VList
|
|---|
| 478 | }
|
|---|
| 479 | }
|
|---|
| 480 | my $first = 1;
|
|---|
| 481 | while (defined $section) {
|
|---|
| 482 | @tmp = split /\./, $section;
|
|---|
| 483 | if (scalar(@tmp) > 1) {
|
|---|
| 484 | return ($thistype, $childtype);
|
|---|
| 485 | }
|
|---|
| 486 | if (!$first) {
|
|---|
| 487 | $title = $doc_obj->get_metadata_element ($section, "Title");
|
|---|
| 488 | if (!defined $title || $title !~ /^\d+$/) {
|
|---|
| 489 | return ($thistype, $childtype);
|
|---|
| 490 | }
|
|---|
| 491 | }
|
|---|
| 492 | $first = 0;
|
|---|
| 493 | $section = $doc_obj->get_next_section($section);
|
|---|
| 494 | }
|
|---|
| 495 | if ($doc_obj->get_text_length ($doc_obj->get_top_section())) {
|
|---|
| 496 | $thistype = "Paged";
|
|---|
| 497 | } else {
|
|---|
| 498 | $thistype = "Invisible";
|
|---|
| 499 | }
|
|---|
| 500 | $childtype = "Paged";
|
|---|
| 501 | return ($thistype, $childtype);
|
|---|
| 502 | }
|
|---|
| 503 |
|
|---|
| 504 | sub assoc_files {
|
|---|
| 505 | my $self = shift (@_);
|
|---|
| 506 | my ($doc_obj, $archivedir) = @_;
|
|---|
| 507 | my ($afile);
|
|---|
| 508 |
|
|---|
| 509 | foreach my $assoc_file (@{$doc_obj->get_assoc_files()}) {
|
|---|
| 510 | # if assoc file starts with a slash, we put it relative to the assoc
|
|---|
| 511 | # dir, otherwise it is relative to the HASH... directory
|
|---|
| 512 | if ($assoc_file->[1] =~ m@^[/\\]@) {
|
|---|
| 513 | $afile = &util::filename_cat($self->{'assocdir'},$assoc_file->[1]);
|
|---|
| 514 | } else {
|
|---|
| 515 | $afile = &util::filename_cat($self->{'assocdir'}, $archivedir, $assoc_file->[1]);
|
|---|
| 516 | }
|
|---|
| 517 | &util::hard_link ($assoc_file->[0], $afile);
|
|---|
| 518 | }
|
|---|
| 519 | }
|
|---|
| 520 |
|
|---|
