1 | ###########################################################################
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2 | #
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3 | # CSVPlugin.pm -- A plugin for files in comma-separated value format
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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 2006 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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27 | package CSVPlugin;
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28 |
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29 | use extrametautil;
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30 |
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31 | use ReadTextFile;
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32 | use SplitTextFile; # for a couple routines, but we not inheriting
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33 | use MetadataRead;
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34 | use CSVFieldSeparator;
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35 |
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36 | use strict;
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37 | no strict 'refs'; # allow filehandles to be variables and viceversa
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38 |
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39 | use Text::CSV;
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40 |
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41 | sub BEGIN {
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42 | @CSVPlugin::ISA = ('MetadataRead', 'ReadTextFile', 'CSVFieldSeparator');
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43 | binmode(STDERR, ":utf8");
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44 |
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45 | }
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46 |
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47 |
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48 | my $arguments =
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49 | [
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50 | { 'name' => "process_exp",
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51 | 'desc' => "{BaseImporter.process_exp}",
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52 | 'type' => "regexp",
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53 | 'reqd' => "no",
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54 | 'deft' => &get_default_process_exp() },
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55 | { 'name' => "filename_field",
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56 | 'desc' => "{CSVPlugin.filename_field}",
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57 | 'type' => "string",
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58 | 'reqd' => "no",
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59 | 'deft' => "Filename" },
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60 | { 'name' => "no_document_if_source_unspecified",
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61 | 'desc' => "{CSVPlugin.no_document_if_source_unspecified}",
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62 | 'type' => "flag",
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63 | 'reqd' => "no"},
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64 | { 'name' => "no_document_if_source_missing",
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65 | 'desc' => "{CSVPlugin.no_document_if_source_missing}",
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66 | 'type' => "flag",
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67 | 'reqd' => "no"},
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68 | { 'name' => "use_namespace_for_field_names",
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69 | 'desc' => "{CSVPlugin.use_namespace_for_field_names}",
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70 | 'type' => "string",
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71 | 'reqd' => "no"},
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72 | { 'name' => "store_field_values_as_document_text",
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73 | 'desc' => "{CSVPlugin.store_field_values_as_document_text}",
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74 | 'type' => "flag",
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75 | 'reqd' => "no"},
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76 |
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77 |
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78 | ];
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79 |
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80 |
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81 | my $options = { 'name' => "CSVPlugin",
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82 | 'desc' => "{CSVPlugin.desc}",
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83 | 'abstract' => "no",
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84 | 'inherits' => "yes",
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85 | 'explodes' => "yes",
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86 | 'args' => $arguments };
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87 |
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88 |
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89 | # This plugin processes files with the suffix ".csv"
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90 | sub get_default_process_exp {
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91 | return q^(?i)(\.csv)$^;
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92 | }
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93 |
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94 | sub new
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95 | {
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96 | my ($class) = shift (@_);
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97 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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98 | push(@$pluginlist, $class);
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99 |
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100 | push(@{$hashArgOptLists->{"ArgList"}}, @{$arguments});
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101 | push(@{$hashArgOptLists->{"OptList"}}, $options);
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102 |
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103 | new CSVFieldSeparator($pluginlist, $inputargs, $hashArgOptLists);
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104 | my $self = new ReadTextFile($pluginlist, $inputargs, $hashArgOptLists);
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105 |
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106 | $self->{'textcat_store'} = {};
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107 | $self->{'metapass_srcdoc'} = {}; # which segments have valid metadata_srcdoc
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108 |
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109 | if ($self->{'use_namespace_for_field_names'} =~ /^\s*$/) {
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110 | $self->{'use_namespace_for_field_names'} = undef;
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111 | }
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112 |
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113 | return bless $self, $class;
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114 | }
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115 |
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116 |
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117 | # mark the file as a metadata file
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118 | sub file_block_read {
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119 | my $self = shift (@_);
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120 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $gli) = @_;
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121 |
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122 | my $filename_full_path = &FileUtils::filenameConcatenate($base_dir, $file);
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123 | return undef unless $self->can_process_this_file($filename_full_path);
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124 |
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125 | if (($ENV{'GSDLOS'} =~ m/^windows$/) && ($^O ne "cygwin")) {
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126 | # convert to full name - paths stored in block hash are long filenames
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127 | $filename_full_path = &util::upgrade_if_dos_filename($filename_full_path);
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128 | }
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129 | # kjdon - upgrade method converts everyhting to lower case drive letter.
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130 | # so would we need the following stuff???
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131 | # my $lower_drive = $filename_full_path;
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132 | # $lower_drive =~ s/^([A-Z]):/\l$1:/i;
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133 |
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134 | # my $upper_drive = $filename_full_path;
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135 | # $upper_drive =~ s/^([A-Z]):/\u$1:/i;
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136 |
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137 | # $block_hash->{'metadata_files'}->{$lower_drive} = 1;
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138 | # $block_hash->{'metadata_files'}->{$upper_drive} = 1;
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139 |
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140 | # }
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141 | # else {
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142 | ### $block_hash->{'metadata_files'}->{$filename_full_path} = 1;
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143 | # }
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144 | $block_hash->{'metadata_files'}->{$filename_full_path} = 1;
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145 | return undef; #1
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146 | }
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147 |
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148 | sub metadata_read
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149 | {
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150 | my $self = shift (@_);
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151 | my ($pluginfo, $base_dir, $file, $block_hash,
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152 | $extrametakeys, $extrametadata, $extrametafile,
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153 | $processor, $gli, $aux) = @_;
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154 |
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155 | # can we process this file??
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156 | my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
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157 | return undef unless $self->can_process_this_file_for_metadata($filename_full_path);
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158 |
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159 | print STDERR "\n<Processing n='$file' p='CSVPlugin'>\n" if ($gli);
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160 | print STDERR "CSVPlugin: processing $file\n" if ($self->{'verbosity'}) > 1;
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161 |
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162 | my $outhandle = $self->{'outhandle'};
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163 | my $failhandle = $self->{'failhandle'};
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164 | my $verbosity = $self->{'verbosity'};
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165 |
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166 | # don't add to block list, as we may do some processing in read.
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167 |
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168 | # Do encoding stuff
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169 | my ($language, $content_encoding) = $self->textcat_get_language_encoding ($filename_full_path);
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170 | if ($self->{'verbosity'} > 2) {
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171 | print $outhandle "CSVPlugin: reading $file as ($content_encoding,$language)\n";
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172 | }
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173 | # store these values for read
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174 | my $le_rec = { 'language' => $language, 'encoding' => $content_encoding };
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175 | $self->{'textcat_store'}->{$file} = $le_rec;
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176 |
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177 | my $metadata_store = {};
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178 | $self->{'metadata_store'}->{$file} = $metadata_store; # used to record metadata for segments with no src doc
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179 |
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180 | my $CSV_FILE;
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181 | open($CSV_FILE, "<:encoding($content_encoding)", "$filename_full_path");
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182 | my $separate_char = $self->{'csv_field_separator'};
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183 |
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184 | my $md_val_sep = $self->{'metadata_value_separator'};
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185 | undef $md_val_sep if ($md_val_sep eq "");
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186 |
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187 | my $csv_file_field_line;
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188 | if ($separate_char =~ m/^auto$/i) {
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189 |
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190 | $csv_file_field_line = <$CSV_FILE>;
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191 | $separate_char = $self->resolve_auto($csv_file_field_line,$self->{'plugin_type'});
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192 | seek $CSV_FILE, 0, 0; # move pointer back to start of file, as we want to read in the fields using csv.
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193 | }
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194 |
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195 | my $csv = Text::CSV->new();
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196 | $csv->sep_char($separate_char);
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197 | $csv->binary(1);
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198 |
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199 | my @csv_file_fields = undef;
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200 |
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201 | my $first_row = $csv->getline ($CSV_FILE);
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202 | if (defined $first_row) {
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203 | @csv_file_fields = @$first_row;
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204 | }
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205 | else {
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206 | $self->print_error($outhandle, $failhandle, $gli, $filename_full_path, "Error: Badly formatted CSV header line: $csv_file_field_line");
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207 | return -1;
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208 | }
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209 |
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210 | my $found_filename_field = 0;
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211 | my $filename_field = $self->{'filename_field'};
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212 | for (my $i = 0; $i < scalar(@csv_file_fields); $i++) {
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213 | # Remove any spaces from the field names, and surrounding quotes too
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214 | $csv_file_fields[$i] =~ s/ //g;
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215 | $csv_file_fields[$i] =~ s/^"//;
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216 | $csv_file_fields[$i] =~ s/"$//;
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217 |
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218 | if ($self->{'use_namespace_for_field_names'}) {
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219 | $csv_file_fields[$i] = $self->{'use_namespace_for_field_names'}. "." . $csv_file_fields[$i];
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220 | }
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221 | if ($csv_file_fields[$i] eq $filename_field) {
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222 | $found_filename_field = 1;
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223 | }
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224 | }
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225 |
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226 |
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227 | if (!$found_filename_field) {
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228 | $self->print_warning($outhandle, $failhandle, $gli, $filename_full_path, "No $filename_field field in CSV file, metadata cannot be assigned to documents, will use metadata only dummy documents");
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229 |
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230 | }
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231 |
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232 | my $count = 0;
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233 | while (my $csv_line = $csv->getline($CSV_FILE)) {
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234 | my @md_vals = @$csv_line;
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235 | $count++;
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236 |
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237 | # Build a hash of metadata name to metadata value for this line
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238 | my %csv_line_metadata;
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239 |
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240 | my $md_vals_len = scalar(@md_vals);
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241 |
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242 | for (my $i=0; $i<$md_vals_len; $i++) {
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243 | my $md_val = $md_vals[$i];
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244 | # Only bother with non-empty values
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245 | if ($md_val ne "" && defined($csv_file_fields[$i])) {
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246 |
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247 | my $md_name = $csv_file_fields[$i];
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248 | $csv_line_metadata{$md_name} = [];
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249 | if (defined $md_val_sep) {
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250 |
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251 | my @within_md_vals = split(/${md_val_sep}/,$md_val);
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252 |
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253 | # protect square brackets in metadata values by hex entity encoding them
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254 | # As unescaped square bracket chars in metadata
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255 | # have special meaning in GS' Java runtime code
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256 | my @escaped_within_md_vals = ();
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257 | for my $meta_value (@within_md_vals) {
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258 |
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259 | $meta_value =~ s/\[/&\#091;/g;
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260 | $meta_value =~ s/\]/&\#093;/g;
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261 | push(@escaped_within_md_vals, $meta_value);
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262 | }
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263 | push (@{$csv_line_metadata{$md_name}}, @escaped_within_md_vals);
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264 | }
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265 | else {
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266 | # protect square brackets in metadata values by hex entity encoding them
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267 | my $escaped_metadata_value = $md_val;
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268 | $escaped_metadata_value =~ s/\[/&\#091;/g;
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269 | $escaped_metadata_value =~ s/\]/&\#093;/g;
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270 | push (@{$csv_line_metadata{$md_name}}, $escaped_metadata_value);
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271 | }
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272 | }
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273 | }
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274 |
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275 | my $csv_line_section_array = $csv_line_metadata{"Section"};
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276 | my $section_suffix = "";
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277 | if (defined $csv_line_section_array) {
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278 | my $section_value = shift(@$csv_line_section_array);
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279 | if ($section_value =~ /[\d.]+/m){
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280 | my $section_suffix = "///Section/" . $section_value;
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281 | foreach my $metaname (keys %csv_line_metadata) {
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282 | my $new_name = $metaname . $section_suffix;
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283 | $csv_line_metadata{$new_name} = delete $csv_line_metadata{$metaname};
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284 | }
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285 | } else{
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286 | unshift(@$csv_line_section_array, $section_value);
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287 | }
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288 | }
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289 |
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290 | # do we have filename field?
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291 | # We can't associate any metadata without knowing the file to associate it with
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292 | my $has_srcdoc = 0;
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293 | my $missing_srcdoc = 0;
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294 | my $csv_line_filename="";;
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295 | if ($found_filename_field) {
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296 | # is there a srcdoc mentioned?
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297 | my $csv_line_filename_array = $csv_line_metadata{$filename_field};
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298 | if (!defined $csv_line_filename_array) {
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299 | $self->print_warning($outhandle, $failhandle, $gli, $filename_full_path, "No $filename_field metadata in CSV line num $count");
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300 | } else {
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301 | $csv_line_filename = shift(@$csv_line_filename_array);
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302 | # TODO - have an option for whether we do this or not
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303 | if (&FileUtils::fileExists(&FileUtils::filenameConcatenate($base_dir, $csv_line_filename))) {
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304 | $has_srcdoc = 1;
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305 |
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306 | delete $csv_line_metadata{$filename_field};
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307 | } else {
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308 | $self->print_warning($outhandle, $failhandle, $gli, $filename_full_path, "$csv_line_filename in $filename_field metadata in CSV line num $count is not found");
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309 | $missing_srcdoc = 1; # there was one mentioned but its not found
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310 | }
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311 | }
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312 |
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313 | }
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314 | if ($has_srcdoc) {
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315 | print $outhandle "Storing metadata, segment $count, for document $csv_line_filename\n" if ($verbosity > 2);
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316 | $self->store_meta_in_extrametadata($csv_line_filename, \%csv_line_metadata, $file, $filename_full_path, $extrametakeys, $extrametadata, $extrametafile);
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317 | } else {
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318 | my $store_for_dummy = 1;
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319 | if ($missing_srcdoc && $self->{'no_document_if_source_missing'}) {
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320 | $self->print_warning($outhandle, $failhandle, $gli, $filename_full_path,"Not storing metadata for line $count as source doc is missing");
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321 | $store_for_dummy = 0;
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322 | } elsif(!$missing_srcdoc && $self->{'no_document_if_source_unspecified'}) {
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323 | $self->print_warning($outhandle, $failhandle, $gli, $filename_full_path,"Not storing metadata for line $count as source doc is unspecified");
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324 | $store_for_dummy = 0;
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325 | }
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326 | if ($store_for_dummy) {
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327 |
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328 | print $outhandle "Storing metadata for dummy document, segment $count\n" if ($verbosity > 2);
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329 | $metadata_store->{$count} = \%csv_line_metadata;
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330 | }
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331 | }
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332 | } # while csv_line = csv->getline
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333 | close ($CSV_FILE);
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334 | }
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335 |
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336 | #adapted from read in splittextfile
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337 | sub read {
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338 | my $self = shift (@_);
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339 | my ($pluginfo, $base_dir, $file, $block_hash, $metadata, $processor, $maxdocs, $total_count, $gli) = @_;
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340 | my $outhandle = $self->{'outhandle'};
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341 | my $verbosity = $self->{'verbosity'};
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342 |
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343 | # can we process this file??
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344 | my ($filename_full_path, $filename_no_path) = &util::get_full_filenames($base_dir, $file);
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345 | return undef unless $self->can_process_this_file($filename_full_path);
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346 |
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347 | $file =~ s/^[\/\\]+//; # $file often begins with / so we'll tidy it up
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348 |
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349 | my $le_rec = $self->{'textcat_store'}->{$file};
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350 | if (!defined $le_rec) {
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351 | # means no text was found;
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352 | return 0; # not processed but no point in passing it on
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353 | }
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354 |
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355 | print STDERR "<Processing n='$file' p='$self->{'plugin_type'}'>\n" if ($gli);
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356 | print $outhandle "$self->{'plugin_type'} processing $file\n"
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357 | if $self->{'verbosity'} > 1;
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358 |
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359 | my $language = $le_rec->{'language'};
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360 | my $encoding = $le_rec->{'encoding'};
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361 | $self->{'textcat_store'}->{$file} = undef;
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362 |
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363 | my $metadata_store = $self->{'metadata_store'}->{$file}; # a hash of seg num to metadata hash
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364 |
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365 |
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366 | # Process each segment in turn
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367 | my $segment = 0; #which segment/record number we have
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368 | my $count = 0; # num doc objs produced
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369 |
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370 | my ($filemeta) = $file =~ /([^\\\/]+)$/; #why?
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371 | my $plugin_filename_encoding = $self->{'filename_encoding'};
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372 | my $filename_encoding = $self->deduce_filename_encoding($file,$metadata,$plugin_filename_encoding);
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373 |
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374 | my $id;
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375 |
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376 | foreach $segment (sort { $a <=> $b } keys (%$metadata_store)) {
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377 | print $outhandle "processing segment $segment as its own document\n"
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378 | if $self->{'verbosity'} > 1;
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379 | $count++;
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380 | # create a new document
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381 | my $doc_obj = new doc ($filename_full_path, "indexed_doc", $self->{'file_rename_method'});
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382 | my $cursection = $doc_obj->get_top_section();
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383 | $doc_obj->add_utf8_metadata($cursection, "Language", $language);
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384 | $doc_obj->add_utf8_metadata($cursection, "Encoding", $encoding);
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385 |
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386 | $self->set_Source_metadata($doc_obj, $filename_full_path, $filename_encoding);
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387 |
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388 | $doc_obj->add_utf8_metadata($cursection, "SourceSegment", "$segment");
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389 | if ($self->{'cover_image'}) {
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390 | $self->associate_cover_image($doc_obj, $filename_full_path);
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391 | }
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392 | $doc_obj->add_utf8_metadata($cursection, "Plugin", "$self->{'plugin_type'}");
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393 |
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394 | # include any metadata passed in from previous plugins
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395 | # note that this metadata is associated with the top level section
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396 | $self->extra_metadata ($doc_obj, $cursection, $metadata);
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397 |
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398 | # add our stored metadata from metadata_read pass
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399 | my $segment_metadata = $metadata_store->{$segment};
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400 | $self->extra_metadata($doc_obj, $cursection, $segment_metadata);
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401 | if ($self->{'store_field_values_as_document_text'}) {
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402 | my $new_text = "";
|
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403 | foreach my $f (keys %$segment_metadata) {
|
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404 | my $values = $segment_metadata->{$f};
|
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405 | $new_text .= join (", ", @$values).", ";
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406 | }
|
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407 |
|
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408 | $doc_obj->add_utf8_text($cursection, $new_text);
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409 | }
|
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410 | # do any automatic metadata extraction - does this make sense??
|
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411 | #$self->auto_extract_metadata ($doc_obj);
|
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412 |
|
---|
413 | # Calculate a "base" document ID.
|
---|
414 | if (!defined $id) {
|
---|
415 | $id = &SplitTextFile::get_base_OID($self,$doc_obj);
|
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416 | }
|
---|
417 |
|
---|
418 | # add an OID
|
---|
419 | &SplitTextFile::add_segment_OID($self, $doc_obj, $id, $segment);
|
---|
420 |
|
---|
421 | # process the document
|
---|
422 | $processor->process($doc_obj);
|
---|
423 |
|
---|
424 | $self->{'num_processed'} ++;
|
---|
425 | if ($maxdocs != -1 && $self->{'num_processed'} >= $maxdocs) {
|
---|
426 | last;
|
---|
427 | }
|
---|
428 | }
|
---|
429 |
|
---|
430 | delete $self->{'metadata_store'}->{$file};
|
---|
431 |
|
---|
432 | # Return number of document objects produced
|
---|
433 | return $count;
|
---|
434 | }
|
---|
435 |
|
---|
436 | sub print_warning {
|
---|
437 | my $self = shift(@_);
|
---|
438 | my ($outhandle, $failhandle, $gli, $file, $error) = @_;
|
---|
439 |
|
---|
440 | print $outhandle "CSVPlugin Warning: $file: $error\n";
|
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441 | print $failhandle "CSVPlugin Warning: $file: $error\n";
|
---|
442 | print STDERR "<ProcessingError n='$file' r='$error'/>\n" if ($gli);
|
---|
443 |
|
---|
444 | }
|
---|
445 | sub print_error
|
---|
446 | {
|
---|
447 |
|
---|
448 | my $self = shift(@_);
|
---|
449 | my ($outhandle, $failhandle, $gli, $file, $error) = @_;
|
---|
450 |
|
---|
451 | print $outhandle "CSVPlugin Error: $file: $error\n";
|
---|
452 | print $failhandle "CSVPlugin Error: $file: $error\n";
|
---|
453 | print STDERR "<ProcessingError n='$file' r='$error'/>\n" if ($gli);
|
---|
454 | }
|
---|
455 |
|
---|
456 |
|
---|
457 | 1;
|
---|