1 | ###########################################################################
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2 | #
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3 | # List.pm -- A general and flexible list classifier with most of
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4 | # the abilities of AZCompactList, and better Unicode,
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5 | # metadata and sorting capabilities.
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6 | #
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7 | # A component of the Greenstone digital library software
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8 | # from the New Zealand Digital Library Project at the
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9 | # University of Waikato, New Zealand.
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10 | #
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11 | # Author: Michael Dewsnip, NZDL Project, University of Waikato, NZ
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12 | #
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13 | # Copyright (C) 2005 New Zealand Digital Library Project
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14 | #
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15 | # This program is free software; you can redistribute it and/or modify
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16 | # it under the terms of the GNU General Public License as published by
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17 | # the Free Software Foundation; either version 2 of the License, or
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18 | # (at your option) any later version.
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19 | #
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20 | # This program is distributed in the hope that it will be useful,
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21 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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22 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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23 | # GNU General Public License for more details.
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24 | #
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25 | # You should have received a copy of the GNU General Public License
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26 | # along with this program; if not, write to the Free Software
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27 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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28 | #
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29 | # TO DO: - Remove punctuation from metadata values before sorting.
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30 | # - Add an AZCompactList-style hlist option?
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31 | #
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32 | ###########################################################################
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33 |
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34 | package List;
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35 |
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36 |
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37 | use BaseClassifier;
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38 |
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39 | use strict;
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40 |
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41 |
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42 | sub BEGIN {
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43 | @List::ISA = ('BaseClassifier');
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44 | }
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45 |
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46 | my $partition_type_list =
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47 | [ { 'name' => "per_letter",
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48 | 'desc' => "{List.level_partition.per_letter}" },
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49 | { 'name' => "approximate_size",
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50 | 'desc' => "{List.level_partition.approximate_size}"},
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51 | { 'name' => "constant_size",
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52 | 'desc' => "{List.level_partition.constant_size}" },
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53 | { 'name' => "none",
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54 | 'desc' => "{List.level_partition.none}" } ];
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55 |
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56 | # following used to check types later on
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57 | my $valid_partition_types = { 'per_letter' => 1,
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58 | 'constant_size' => 1,
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59 | 'per_letter_fixed_size' => 1,
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60 | 'approximate_size' => 1,
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61 | 'none' => 1};
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62 |
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63 | my $bookshelf_type_list =
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64 | [ { 'name' => "always",
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65 | 'desc' => "{List.bookshelf_type.always}" },
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66 | { 'name' => "duplicate_only",
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67 | 'desc' => "{List.bookshelf_type.duplicate_only}" },
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68 | { 'name' => "never",
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69 | 'desc' => "{List.bookshelf_type.never}" } ];
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70 |
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71 | my $arguments =
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72 | [ { 'name' => "metadata",
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73 | 'desc' => "{List.metadata}",
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74 | 'type' => "metadata",
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75 | 'reqd' => "yes" },
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76 |
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77 | # The interesting options
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78 | { 'name' => "bookshelf_type",
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79 | 'desc' => "{List.bookshelf_type}",
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80 | 'type' => "enum",
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81 | 'list' => $bookshelf_type_list,
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82 | 'deft' => "never" },
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83 | { 'name' => "classify_sections",
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84 | 'desc' => "{List.classify_sections}",
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85 | 'type' => "flag" },
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86 | { 'name' => "partition_type_within_level",
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87 | 'desc' => "{List.partition_type_within_level}",
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88 | 'type' => "enumstring", # Must be enumstring because multiple values can be specified (separated by '/')
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89 | 'list' => $partition_type_list,
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90 | 'deft' => "per_letter" },
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91 | { 'name' => "partition_size_within_level",
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92 | 'desc' => "{List.partition_size_within_level}",
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93 | 'type' => "string" }, # Must be string because multiple values can be specified (separated by '/')
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94 | { 'name' => "partition_name_length",
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95 | 'desc' => "{List.partition_name_length}",
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96 | 'type' => "string" },
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97 | { 'name' => "sort_leaf_nodes_using",
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98 | 'desc' => "{List.sort_leaf_nodes_using}",
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99 | 'type' => "metadata",
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100 | 'deft' => "Title" },
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101 | { 'name' => "reverse_sort_leaf_nodes",
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102 | 'desc' => "{List.reverse_sort_leaf_nodes}",
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103 | 'type' => "flag"},
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104 | { 'name' => "sort_using_unicode_collation",
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105 | 'desc' => "{List.sort_using_unicode_collation}",
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106 | 'type' => "flag" },
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107 | { 'name' => "use_hlist_for",
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108 | 'desc' => "{List.use_hlist_for}",
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109 | 'type' => "string" },
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110 | { 'name' => "removeprefix",
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111 | 'desc' => "{BasClas.removeprefix}",
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112 | 'type' => "regexp" },
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113 | { 'name' => "removesuffix",
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114 | 'desc' => "{BasClas.removesuffix}",
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115 | 'type' => "regexp" } ];
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116 |
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117 | my $options = { 'name' => "List",
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118 | 'desc' => "{List.desc}",
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119 | 'abstract' => "no",
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120 | 'inherits' => "yes",
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121 | 'args' => $arguments };
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122 |
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123 |
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124 | sub new
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125 | {
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126 | my ($class) = shift(@_);
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127 | my ($classifierslist, $inputargs, $hashArgOptLists) = @_;
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128 | push(@$classifierslist, $class);
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129 |
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130 | push(@{$hashArgOptLists->{"ArgList"}}, @{$arguments});
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131 | push(@{$hashArgOptLists->{"OptList"}}, $options);
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132 |
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133 | my $self = new BaseClassifier($classifierslist, $inputargs, $hashArgOptLists);
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134 |
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135 | if ($self->{'info_only'}) {
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136 | # don't worry about any options etc
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137 | return bless $self, $class;
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138 | }
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139 |
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140 | # The metadata elements to use (required)
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141 | if (!$self->{'metadata'}) {
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142 | die "Error: No metadata fields specified for List.\n";
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143 | }
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144 |
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145 | my @metadata_groups = split(/[\/]/, $self->{'metadata'});
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146 | $self->{'metadata_groups'} = \@metadata_groups;
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147 |
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148 | # The classifier button name (default: the first metadata element specified)
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149 | if (!$self->{'buttonname'}) {
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150 | my $first_metadata_group = $metadata_groups[0];
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151 | my $first_metadata_element = (split(/[\;|,\/]/, $first_metadata_group))[0];
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152 | $self->{'buttonname'} = $self->generate_title_from_metadata($first_metadata_element);
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153 | }
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154 |
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155 | # Whether to group items into a bookshelf, (must be 'always' for all metadata fields except the last)
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156 | foreach my $metadata_group (@metadata_groups) {
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157 | $self->{$metadata_group . ".bookshelf_type"} = "always";
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158 | }
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159 | my $last_metadata_group = $metadata_groups[$#metadata_groups];
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160 | # Default: duplicate_only, ie. leave leaf nodes ungrouped (equivalent to AZCompactList -mingroup 2)
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161 | $self->{$last_metadata_group . ".bookshelf_type"} = $self->{'bookshelf_type'};
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162 |
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163 | # Whether to use an hlist or a vlist for each level in the hierarchy (default: vlist)
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164 | foreach my $metadata_group (@metadata_groups) {
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165 | $self->{$metadata_group . ".list_type"} = "VList";
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166 | }
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167 | foreach my $metadata_group (split(/\,/, $self->{'use_hlist_for'})) {
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168 | $self->{$metadata_group . ".list_type"} = "HList";
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169 | }
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170 |
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171 | # How the items are grouped into partitions (default: no partition)
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172 | # for each level (metadata group), separated by '/'
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173 | if (!$self->{"partition_type_within_level"}) {
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174 | foreach my $metadata_group (@metadata_groups) {
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175 | $self->{$metadata_group . ".partition_type_within_level"} = "none";
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176 | }
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177 | } else {
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178 | my @partition_type_within_levellist = split(/\//, $self->{'partition_type_within_level'});
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179 |
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180 | my $first = 1;
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181 | foreach my $metadata_group (@metadata_groups) {
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182 | my $partition_type_within_levelelem = shift(@partition_type_within_levellist);
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183 | if (defined($partition_type_within_levelelem) && $partition_type_within_levelelem eq "per_letter_fixed_size") {
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184 | print STDERR "per letter fixed size, changing to approximate size\n";
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185 | $partition_type_within_levelelem = "approximate_size";
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186 | }
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187 | if (defined($partition_type_within_levelelem) && defined $valid_partition_types->{$partition_type_within_levelelem}) {
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188 | $self->{$metadata_group . ".partition_type_within_level"} = $partition_type_within_levelelem;
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189 | }
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190 | else {
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191 | if ($first) {
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192 | $self->{$metadata_group . ".partition_type_within_level"} = "none";
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193 | $first = 0;
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194 | } else {
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195 | $self->{$metadata_group . ".partition_type_within_level"} = $self->{$metadata_groups[0] . ".partition_type_within_level"};
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196 | }
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197 | if (defined($partition_type_within_levelelem)) {
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198 | # ie invalid entry
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199 | print STDERR "invalid partition type for level $metadata_group: $partition_type_within_levelelem, defaulting to ". $self->{$metadata_group . ".partition_type_within_level"} ."\n";
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200 | }
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201 | }
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202 | }
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203 | }
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204 |
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205 | # The number of items in each partition
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206 | if (!$self->{'partition_size_within_level'}) {
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207 | # Default: 20
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208 | foreach my $metadata_group (@metadata_groups) {
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209 | $self->{$metadata_group . ".partition_size_within_level"} = 20;
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210 | }
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211 | }
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212 | else {
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213 | my @partition_size_within_levellist = split(/\//, $self->{'partition_size_within_level'});
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214 |
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215 | # Assign values based on the partition_size_within_level parameter
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216 | foreach my $metadata_group (@metadata_groups) {
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217 | my $partition_size_within_levelelem = shift(@partition_size_within_levellist);
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218 | if (defined($partition_size_within_levelelem)) {
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219 | $self->{$metadata_group . ".partition_size_within_level"} = $partition_size_within_levelelem;
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220 | }
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221 | else {
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222 | $self->{$metadata_group . ".partition_size_within_level"} = $self->{$metadata_groups[0] . ".partition_size_within_level"};
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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 | # The removeprefix and removesuffix expressions
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228 | if ($self->{'removeprefix'}) {
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229 | # If there are more than one expressions, use '' to quote each experession and '/' to separate
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230 | my @removeprefix_exprs_within_levellist = split(/'\/'/, $self->{'removeprefix'});
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231 |
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232 | foreach my $metadata_group (@metadata_groups) {
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233 | my $removeprefix_expr_within_levelelem = shift(@removeprefix_exprs_within_levellist);
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234 | if (defined($removeprefix_expr_within_levelelem) && $removeprefix_expr_within_levelelem ne "") {
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235 | # Remove the other ' at the beginning and the end if there is any
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236 | $removeprefix_expr_within_levelelem =~ s/^'//;
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237 | $removeprefix_expr_within_levelelem =~ s/'$//;
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238 | # Remove the extra ^ at the beginning
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239 | $removeprefix_expr_within_levelelem =~ s/^\^//;
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240 | $self->{$metadata_group . ".remove_prefix_expr"} = $removeprefix_expr_within_levelelem;
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241 | } else {
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242 | $self->{$metadata_group . ".remove_prefix_expr"} = $self->{$metadata_groups[0] . ".remove_prefix_expr"};
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243 | }
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244 | }
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245 | }
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246 | if ($self->{'removesuffix'}) {
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247 | my @removesuffix_exprs_within_levellist = split(/'\/'/, $self->{'removesuffix'});
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248 |
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249 | foreach my $metadata_group (@metadata_groups) {
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250 | my $removesuffix_expr_within_levelelem = shift(@removesuffix_exprs_within_levellist);
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251 | if (defined($removesuffix_expr_within_levelelem) && $removesuffix_expr_within_levelelem ne "") {
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252 | $removesuffix_expr_within_levelelem =~ s/^'//;
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253 | $removesuffix_expr_within_levelelem =~ s/'$//;
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254 | # Remove the extra $ at the end
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255 | $removesuffix_expr_within_levelelem =~ s/\$$//;
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256 | $self->{$metadata_group . ".remove_suffix_expr"} = $removesuffix_expr_within_levelelem;
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257 | } else {
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258 | $self->{$metadata_group . ".remove_suffix_expr"} = $self->{$metadata_groups[0] . ".remove_suffix_expr"};
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259 | }
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260 | }
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261 | }
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262 |
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263 | # The metadata elements to use to sort the leaf nodes (default: Title)
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264 | my @sort_leaf_nodes_using_metadata_groups = ( "Title" );
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265 | if ($self->{'sort_leaf_nodes_using'}) {
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266 | @sort_leaf_nodes_using_metadata_groups = split(/\|/, $self->{'sort_leaf_nodes_using'});
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267 | }
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268 | $self->{'sort_leaf_nodes_using_metadata_groups'} = \@sort_leaf_nodes_using_metadata_groups;
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269 |
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270 | # Create an instance of the Unicode::Collate object if better Unicode sorting is desired
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271 | if ($self->{'sort_using_unicode_collation'}) {
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272 | # To use this you first need to download the allkeys.txt file from
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273 | # http://www.unicode.org/Public/UCA/latest/allkeys.txt and put it in the Perl
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274 | # Unicode/Collate directory.
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275 | require Unicode::Collate;
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276 | $self->{'unicode_collator'} = Unicode::Collate->new();
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277 | }
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278 |
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279 | # An empty array for the document/section OIDs that we are classifying
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280 | $self->{'OIDs'} = [];
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281 | # A hash for all the doc ids that we have seen, so we don't classify something twice
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282 | $self->{'all_doc_OIDs'} = {};
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283 | return bless $self, $class;
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284 | }
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285 |
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286 |
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287 | sub init
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288 | {
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289 | # Nothing to do...
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290 | }
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291 |
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292 |
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293 | # Called for each document in the collection
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294 | sub classify
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295 | {
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296 | my $self = shift(@_);
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297 | my ($doc_obj) = @_;
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298 |
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299 | if (defined $self->{'all_doc_OIDs'}->{$doc_obj->get_OID()}) {
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300 | print STDERR "Warning, List classifier has already seen document ".$doc_obj->get_OID().", not classifying again\n";
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301 | return;
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302 | }
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303 | $self->{'all_doc_OIDs'}->{$doc_obj->get_OID()} = 1;
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304 | # If "-classify_sections" is set, classify every section of the document
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305 | if ($self->{'classify_sections'}) {
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306 | my $section = $doc_obj->get_next_section($doc_obj->get_top_section());
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307 | while (defined $section) {
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308 | $self->classify_section($doc_obj, $doc_obj->get_OID() . ".$section", $section);
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309 | $section = $doc_obj->get_next_section($section);
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310 | }
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311 | }
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312 | # Otherwise just classify the top document section
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313 | else {
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314 | $self->classify_section($doc_obj, $doc_obj->get_OID(), $doc_obj->get_top_section());
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315 | }
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316 |
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317 | }
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318 |
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319 | sub classify_section
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320 | {
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321 | my $self = shift(@_);
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322 | my ($doc_obj,$section_OID,$section) = @_;
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323 |
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324 | my @metadata_groups = @{$self->{'metadata_groups'}};
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325 |
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326 | # Only classify the section if it has a value for one of the metadata elements in the first group
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327 | my $classify_section = 0;
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328 | my $first_metadata_group = $metadata_groups[0];
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329 | my $remove_prefix_expr = $self->{$first_metadata_group . ".remove_prefix_expr"};
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330 | my $remove_suffix_expr = $self->{$first_metadata_group . ".remove_suffix_expr"};
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331 | foreach my $first_metadata_group_element (split(/\;|,/, $first_metadata_group)) {
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332 | my $real_first_metadata_group_element = $self->strip_ex_from_metadata($first_metadata_group_element);
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333 | my $first_metadata_group_element_value = $doc_obj->get_metadata_element($section, $real_first_metadata_group_element);
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334 |
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335 | # Remove prefix/suffix if requested
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336 | if (defined ($first_metadata_group_element_value)) {
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337 | if (defined $remove_prefix_expr && $remove_prefix_expr ne "") {
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338 | $first_metadata_group_element_value =~ s/^$remove_prefix_expr//;
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339 | }
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340 |
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341 | if (defined $remove_suffix_expr && $remove_suffix_expr ne "") {
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342 | $first_metadata_group_element_value =~ s/$remove_suffix_expr$//;
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343 | }
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344 | }
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345 | if (defined($first_metadata_group_element_value) && $first_metadata_group_element_value ne "") {
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346 | # This section must be included in the classifier
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347 | $classify_section = 1;
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348 | last;
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349 | }
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350 | }
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351 |
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352 | # We're not classifying this section because it doesn't have the required metadata
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353 | return if (!$classify_section);
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354 |
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355 | # Otherwise, include this section in the classifier
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356 |
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357 | push(@{$self->{'OIDs'}}, $section_OID);
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358 |
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359 | # Create a hash for the metadata values of each metadata element we're interested in
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360 | my %metadata_groups_done = ();
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361 | foreach my $metadata_group (@metadata_groups, @{$self->{'sort_leaf_nodes_using_metadata_groups'}}) {
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362 | # Take care not to do a metadata group more than once
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363 | unless ($metadata_groups_done{$metadata_group}) {
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364 | my $remove_prefix_expr = $self->{$metadata_group . ".remove_prefix_expr"};
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365 | my $remove_suffix_expr = $self->{$metadata_group . ".remove_suffix_expr"};
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366 | foreach my $metadata_element (split(/\;|,/, $metadata_group)) {
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367 | my $real_metadata_element = $self->strip_ex_from_metadata($metadata_element);
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368 |
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369 | my @metadata_values = @{$doc_obj->get_metadata($section, $real_metadata_element)};
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370 | foreach my $metadata_value (@metadata_values) {
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371 | # Strip leading and trailing whitespace
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372 | $metadata_value =~ s/^\s*//;
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373 | $metadata_value =~ s/\s*$//;
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374 |
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375 | # Remove prefix/suffix if requested
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376 | if (defined $remove_prefix_expr && $remove_prefix_expr ne "") {
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377 | $metadata_value =~ s/^$remove_prefix_expr//;
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378 | }
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379 | if (defined $remove_suffix_expr && $remove_suffix_expr ne "") {
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380 | $metadata_value =~ s/$remove_suffix_expr$//;
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381 | }
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382 |
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383 | # uppercase the metadata - makes the AZList nicer
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384 | $metadata_value = uc($metadata_value);
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385 |
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386 | # We are already working with unicode aware strings at this
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387 | # stage, so we no longer need to convert from utf8 to unicode
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388 | my $metadata_value_unicode_string = $metadata_value; # $self->convert_utf8_string_to_unicode_string($metadata_value);
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389 |
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390 | # Add the metadata value into the list for this combination of metadata group and section
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391 | push(@{$self->{$metadata_group . ".list"}->{$section_OID}}, $metadata_value_unicode_string);
|
---|
392 | }
|
---|
393 | last if (@metadata_values > 0);
|
---|
394 | }
|
---|
395 |
|
---|
396 | $metadata_groups_done{$metadata_group} = 1;
|
---|
397 | }
|
---|
398 | }
|
---|
399 | }
|
---|
400 |
|
---|
401 |
|
---|
402 | sub get_classify_info
|
---|
403 | {
|
---|
404 | my $self = shift(@_);
|
---|
405 |
|
---|
406 | # The metadata groups to classify by
|
---|
407 | my @metadata_groups = @{$self->{'metadata_groups'}};
|
---|
408 | my $first_metadata_group = $metadata_groups[0];
|
---|
409 |
|
---|
410 | # The OID values of the documents to include in the classifier
|
---|
411 | my @OIDs = @{$self->{'OIDs'}};
|
---|
412 |
|
---|
413 | # Create the root node of the classification hierarchy
|
---|
414 | my %classifier_node = ( 'thistype' => "Invisible",
|
---|
415 | 'childtype' => $self->{$first_metadata_group . ".list_type"},
|
---|
416 | 'Title' => $self->{'buttonname'},
|
---|
417 | 'contains' => [],
|
---|
418 | 'mdtype' => $first_metadata_group );
|
---|
419 |
|
---|
420 | # Recursively create the classification hierarchy, one level for each metadata group
|
---|
421 | $self->add_level(\@metadata_groups, \@OIDs, \%classifier_node);
|
---|
422 | return \%classifier_node;
|
---|
423 | }
|
---|
424 |
|
---|
425 |
|
---|
426 | sub add_level
|
---|
427 | {
|
---|
428 | my $self = shift(@_);
|
---|
429 | my @metadata_groups = @{shift(@_)};
|
---|
430 | my @OIDs = @{shift(@_)};
|
---|
431 | my $classifier_node = shift(@_);
|
---|
432 |
|
---|
433 | my $metadata_group = $metadata_groups[0];
|
---|
434 |
|
---|
435 | if (!defined($self->{$metadata_group . ".list"})) {
|
---|
436 | print STDERR "Warning: No metadata values assigned to $metadata_group.\n";
|
---|
437 | return;
|
---|
438 | }
|
---|
439 |
|
---|
440 | # Create a mapping from metadata value to OID
|
---|
441 | my $OID_to_metadata_values_hash_ref = $self->{$metadata_group . ".list"};
|
---|
442 | my %metadata_value_to_OIDs_hash = ();
|
---|
443 | foreach my $OID (@OIDs)
|
---|
444 | {
|
---|
445 | if ($OID_to_metadata_values_hash_ref->{$OID})
|
---|
446 | {
|
---|
447 | my @metadata_values = @{$OID_to_metadata_values_hash_ref->{$OID}};
|
---|
448 | foreach my $metadata_value (@metadata_values)
|
---|
449 | {
|
---|
450 | push(@{$metadata_value_to_OIDs_hash{$metadata_value}}, $OID);
|
---|
451 | }
|
---|
452 | }
|
---|
453 | }
|
---|
454 | #print STDERR "Number of distinct values: " . scalar(keys %metadata_value_to_OIDs_hash) . "\n";
|
---|
455 |
|
---|
456 | # Partition the values (if necessary)
|
---|
457 | my $partition_type_within_level = $self->{$metadata_group . ".partition_type_within_level"};
|
---|
458 | my $partition_size_within_level = $self->{$metadata_group . ".partition_size_within_level"};
|
---|
459 | if ($partition_type_within_level =~ /^per_letter$/i) {
|
---|
460 | # Generate one hlist for each letter
|
---|
461 | my @sortedmetadata_values = $self->sort_metadata_values_array(keys(%metadata_value_to_OIDs_hash));
|
---|
462 | my %metadata_value_to_OIDs_subhash = ();
|
---|
463 |
|
---|
464 | my $lastpartition = substr($sortedmetadata_values[0], 0, 1);
|
---|
465 | foreach my $metadata_value (@sortedmetadata_values) {
|
---|
466 | my $metadata_valuepartition = substr($metadata_value, 0, 1);
|
---|
467 |
|
---|
468 | # Is this the start of a new partition?
|
---|
469 | if ($metadata_valuepartition ne $lastpartition) {
|
---|
470 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $lastpartition, \%metadata_value_to_OIDs_subhash);
|
---|
471 | %metadata_value_to_OIDs_subhash = ();
|
---|
472 | $lastpartition = $metadata_valuepartition;
|
---|
473 | }
|
---|
474 |
|
---|
475 | $metadata_value_to_OIDs_subhash{$metadata_value} = $metadata_value_to_OIDs_hash{$metadata_value};
|
---|
476 | }
|
---|
477 |
|
---|
478 | # Don't forget to add the last partition
|
---|
479 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $lastpartition, \%metadata_value_to_OIDs_subhash);
|
---|
480 |
|
---|
481 | # The partitions are stored in an HList
|
---|
482 | $classifier_node->{'childtype'} = "HList";
|
---|
483 | }
|
---|
484 | elsif ($partition_type_within_level =~ /^approximate_size$/i && scalar(keys %metadata_value_to_OIDs_hash) > $partition_size_within_level) {
|
---|
485 | # Generate hlist based on the first letter of the metadata value (like per_letter) but with restriction on the partition size
|
---|
486 | # If a letter has fewer items than specified by the "partition_size_within_level", then group them together if possible
|
---|
487 | # If a letter has more items than specified, split into several hlists.
|
---|
488 | # Depends on the bookshelf_type, one item can be either a document (when bookshelf_type is "never") or a metadata value (otherwise)
|
---|
489 | my $partition_size_within_level = $self->{$metadata_group . ".partition_size_within_level"};
|
---|
490 | my @sortedmetadata_values = $self->sort_metadata_values_array(keys(%metadata_value_to_OIDs_hash));
|
---|
491 | my $bookshelf_type = $self->{$metadata_group . ".bookshelf_type"};
|
---|
492 |
|
---|
493 | # Separate values by their first letter, each form a bucket, like the per_letter partition type
|
---|
494 | my $last_partition = substr($sortedmetadata_values[0], 0, 1);
|
---|
495 | my %partition_buckets = ();
|
---|
496 | my @metadata_values_in_bucket = ();
|
---|
497 | my $num_items_in_bucket = 0;
|
---|
498 | foreach my $metadata_value (@sortedmetadata_values) {
|
---|
499 | my $metadata_valuepartition = substr($metadata_value, 0, 1);
|
---|
500 | if ($metadata_valuepartition ne $last_partition) {
|
---|
501 | my @temp_array = @metadata_values_in_bucket;
|
---|
502 | # Cache the values that belong to this bucket, and the number of items in this bucket, not necessary to be the same number as the metadata values
|
---|
503 | my %partition_info = ();
|
---|
504 | $partition_info{'metadata_values'} = \@temp_array;
|
---|
505 | $partition_info{'size'} = $num_items_in_bucket;
|
---|
506 | $partition_buckets{$last_partition} = \%partition_info;
|
---|
507 |
|
---|
508 | @metadata_values_in_bucket = ($metadata_value);
|
---|
509 | $num_items_in_bucket = $bookshelf_type eq "never" ? scalar(@{$metadata_value_to_OIDs_hash{$metadata_value}}) : scalar(@metadata_values_in_bucket);
|
---|
510 | $last_partition = $metadata_valuepartition;
|
---|
511 | } else {
|
---|
512 | $num_items_in_bucket += $bookshelf_type eq "never" ? scalar(@{$metadata_value_to_OIDs_hash{$metadata_value}}) : scalar(@metadata_values_in_bucket);
|
---|
513 | push (@metadata_values_in_bucket, $metadata_value);
|
---|
514 | }
|
---|
515 | }
|
---|
516 | # Last one
|
---|
517 | my %partition_info = ();
|
---|
518 | $partition_info{'metadata_values'} = \@metadata_values_in_bucket;
|
---|
519 | $partition_info{'size'} = $num_items_in_bucket;
|
---|
520 | $partition_buckets{$last_partition} = \%partition_info;
|
---|
521 |
|
---|
522 | my @partition_keys = $self->sort_metadata_values_array(keys(%partition_buckets));
|
---|
523 | for (my $i = 0; $i < scalar(@partition_keys) - 1; $i++) {
|
---|
524 | my $partition = $partition_keys[$i];
|
---|
525 | my $items_in_partition = $partition_buckets{$partition}->{'size'};
|
---|
526 | # Merge small buckets together, but keep the numeric bucket apart
|
---|
527 | if ($items_in_partition < $partition_size_within_level) {
|
---|
528 | my $items_in_next_partition = $partition_buckets{$partition_keys[$i+1]}->{'size'};
|
---|
529 | if ($items_in_partition + $items_in_next_partition <= $partition_size_within_level
|
---|
530 | && !(($partition =~ /^[^0-9]/ && $partition_keys[$i+1] =~ /^[0-9]/)
|
---|
531 | || ($partition =~ /^[0-9]/ && $partition_keys[$i+1] =~ /^[^0-9]/))) {
|
---|
532 | foreach my $metadata_value_to_merge (@{$partition_buckets{$partition}->{'metadata_values'}}) {
|
---|
533 | push(@{$partition_buckets{$partition_keys[$i+1]}->{'metadata_values'}}, $metadata_value_to_merge);
|
---|
534 | }
|
---|
535 | $partition_buckets{$partition_keys[$i+1]}->{'size'} += $items_in_partition;
|
---|
536 | delete $partition_buckets{$partition};
|
---|
537 | }
|
---|
538 | }
|
---|
539 | }
|
---|
540 | @partition_keys = $self->sort_metadata_values_array(keys(%partition_buckets));
|
---|
541 |
|
---|
542 | # Add partitions, and divide big bucket into several
|
---|
543 | my $last_partition_end = "";
|
---|
544 | my $partition_start = "";
|
---|
545 | foreach my $partition (@partition_keys) {
|
---|
546 | my @metadata_values = $self->sort_metadata_values_array(@{$partition_buckets{$partition}->{'metadata_values'}});
|
---|
547 | my $items_in_partition = $partition_buckets{$partition}->{'size'};
|
---|
548 | $partition_start = $self->generate_partition_start($metadata_values[0], $last_partition_end, $self->{"partition_name_length"});
|
---|
549 |
|
---|
550 | if ($items_in_partition > $partition_size_within_level) {
|
---|
551 | my $items_done = 0;
|
---|
552 | my %metadata_values_to_OIDs_subhashes = ();
|
---|
553 | for (my $i = 0; $i < scalar(@metadata_values); $i++) {
|
---|
554 | my $metadata_value = $metadata_values[$i];
|
---|
555 | # If the bookshelf_type is "never", count the documents, otherwise count the distinct metadata values
|
---|
556 | my $items_for_this_md_value = $bookshelf_type eq "never" ? scalar(@{$metadata_value_to_OIDs_hash{$metadata_value}}) : 1;
|
---|
557 |
|
---|
558 | my $partitionend = $self->generate_partition_end($metadata_value, $partition_start, $self->{"partition_name_length"});
|
---|
559 | my $partitionname = $partition_start;
|
---|
560 | if ($partitionend ne $partition_start) {
|
---|
561 | $partitionname = $partitionname . "-" . $partitionend;
|
---|
562 | }
|
---|
563 |
|
---|
564 | # Start a new partition
|
---|
565 | if ($items_done + $items_for_this_md_value > $partition_size_within_level && $items_done != 0) {
|
---|
566 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $partitionname, \%metadata_values_to_OIDs_subhashes);
|
---|
567 | $last_partition_end = $partitionend;
|
---|
568 | $partition_start = $self->generate_partition_start($metadata_value, $last_partition_end, $self->{"partition_name_length"});
|
---|
569 | $items_done = 0;
|
---|
570 | %metadata_values_to_OIDs_subhashes = ();
|
---|
571 | }
|
---|
572 |
|
---|
573 | # If bookshelf_type is "never" and the current metadata value holds too many items, need to split into several partitions
|
---|
574 | if ($bookshelf_type eq "never" && $items_for_this_md_value > $partition_size_within_level) {
|
---|
575 | my $partitionname_for_this_value = $self->generate_partition_start($metadata_value, $last_partition_end, $self->{"partition_name_length"});
|
---|
576 | # Get the number of partitions needed for this value
|
---|
577 | my $num_splits = int($items_for_this_md_value / $partition_size_within_level);
|
---|
578 | $num_splits++ if ($items_for_this_md_value / $partition_size_within_level > $num_splits);
|
---|
579 |
|
---|
580 | my @OIDs_for_this_value = @{$metadata_value_to_OIDs_hash{$metadata_value}};
|
---|
581 | for (my $i = 0; $i < $num_splits; $i++) {
|
---|
582 | my %OIDs_subhashes_for_this_value = ();
|
---|
583 | my @OIDs_for_this_partition = ();
|
---|
584 | for (my $d = $i * $partition_size_within_level; $d < (($i+1) * $partition_size_within_level > $items_for_this_md_value ? $items_for_this_md_value : ($i+1) * $partition_size_within_level); $d++) {
|
---|
585 | push (@OIDs_for_this_partition, $OIDs_for_this_value[$d]);
|
---|
586 | }
|
---|
587 |
|
---|
588 | # The last bucket might have only a few items and need to be merged with buckets for subsequent metadata values
|
---|
589 | if ($i == $num_splits - 1 && scalar(@OIDs_for_this_partition) < $partition_size_within_level) {
|
---|
590 | $metadata_values_to_OIDs_subhashes{$metadata_value} = \@OIDs_for_this_partition;
|
---|
591 | $items_done += scalar(@OIDs_for_this_partition);
|
---|
592 | next;
|
---|
593 | }
|
---|
594 |
|
---|
595 | # Add an HList for this bucket
|
---|
596 | $OIDs_subhashes_for_this_value{$metadata_value} = \@OIDs_for_this_partition;
|
---|
597 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $partitionname_for_this_value, \%OIDs_subhashes_for_this_value);
|
---|
598 | $last_partition_end = $partitionname_for_this_value;
|
---|
599 | }
|
---|
600 | next;
|
---|
601 | }
|
---|
602 |
|
---|
603 | $metadata_values_to_OIDs_subhashes{$metadata_value} = $metadata_value_to_OIDs_hash{$metadata_value};
|
---|
604 | $items_done += $bookshelf_type eq "never" ? scalar(@{$metadata_values_to_OIDs_subhashes{$metadata_value}}) : 1;
|
---|
605 |
|
---|
606 | # The last partition
|
---|
607 | if($i == scalar(@metadata_values) - 1) {
|
---|
608 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $partitionname, \%metadata_values_to_OIDs_subhashes);
|
---|
609 | }
|
---|
610 | }
|
---|
611 | }
|
---|
612 | else {
|
---|
613 | # The easier case, just add a partition
|
---|
614 | my %metadata_values_to_OIDs_subhashes = ();
|
---|
615 | for (my $i = 0; $i < scalar(@metadata_values); $i++) {
|
---|
616 | my $metadata_value = $metadata_values[$i];
|
---|
617 | $metadata_values_to_OIDs_subhashes{$metadata_value} = $metadata_value_to_OIDs_hash{$metadata_value};
|
---|
618 | }
|
---|
619 | my $last_metadata_value = $metadata_values[scalar(@metadata_values)-1];
|
---|
620 | my $partitionend = $self->generate_partition_end($last_metadata_value, $partition_start, $self->{"partition_name_length"});
|
---|
621 | my $partitionname = $partition_start;
|
---|
622 | if ($partitionend ne $partition_start) {
|
---|
623 | $partitionname = $partitionname . "-" . $partitionend;
|
---|
624 | }
|
---|
625 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $partitionname, \%metadata_values_to_OIDs_subhashes);
|
---|
626 | $last_partition_end = $partitionend;
|
---|
627 | }
|
---|
628 | }
|
---|
629 |
|
---|
630 | # The partitions are stored in an HList
|
---|
631 | $classifier_node->{'childtype'} = "HList";
|
---|
632 |
|
---|
633 | } # end approximate_size
|
---|
634 | else {
|
---|
635 | # Generate hlists of a certain size
|
---|
636 | if ($partition_type_within_level =~ /^constant_size$/i && scalar(keys %metadata_value_to_OIDs_hash) > $partition_size_within_level) {
|
---|
637 | my @sortedmetadata_values = $self->sort_metadata_values_array(keys(%metadata_value_to_OIDs_hash));
|
---|
638 | my $itemsdone = 0;
|
---|
639 | my %metadata_value_to_OIDs_subhash = ();
|
---|
640 | my $lastpartitionend = "";
|
---|
641 | my $partitionstart;
|
---|
642 | foreach my $metadata_value (@sortedmetadata_values) {
|
---|
643 | $metadata_value_to_OIDs_subhash{$metadata_value} = $metadata_value_to_OIDs_hash{$metadata_value};
|
---|
644 | $itemsdone++;
|
---|
645 | my $itemsinpartition = scalar(keys %metadata_value_to_OIDs_subhash);
|
---|
646 |
|
---|
647 | # Is this the start of a new partition?
|
---|
648 | if ($itemsinpartition == 1) {
|
---|
649 | $partitionstart = $self->generate_partition_start($metadata_value, $lastpartitionend, $self->{"partition_name_length"});
|
---|
650 | }
|
---|
651 |
|
---|
652 | # Is this the end of the partition?
|
---|
653 | if ($itemsinpartition == $partition_size_within_level || $itemsdone == @sortedmetadata_values) {
|
---|
654 | my $partitionend = $self->generate_partition_end($metadata_value, $partitionstart, $self->{"partition_name_length"});
|
---|
655 | my $partitionname = $partitionstart;
|
---|
656 | if ($partitionend ne $partitionstart) {
|
---|
657 | $partitionname = $partitionname . "-" . $partitionend;
|
---|
658 | }
|
---|
659 |
|
---|
660 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $partitionname, \%metadata_value_to_OIDs_subhash);
|
---|
661 | %metadata_value_to_OIDs_subhash = ();
|
---|
662 | $lastpartitionend = $partitionend;
|
---|
663 | }
|
---|
664 | }
|
---|
665 |
|
---|
666 | # The partitions are stored in an HList
|
---|
667 | $classifier_node->{'childtype'} = "HList";
|
---|
668 | }
|
---|
669 |
|
---|
670 | # Otherwise just add all the values to a VList
|
---|
671 | else {
|
---|
672 | $self->add_vlist(\@metadata_groups, $classifier_node, \%metadata_value_to_OIDs_hash);
|
---|
673 | }
|
---|
674 | }
|
---|
675 | }
|
---|
676 |
|
---|
677 |
|
---|
678 | sub convert_utf8_string_to_unicode_string
|
---|
679 | {
|
---|
680 | my $self = shift(@_);
|
---|
681 | my $utf8_string = shift(@_);
|
---|
682 |
|
---|
683 | my $unicode_string = "";
|
---|
684 | foreach my $unicode_value (@{&unicode::utf82unicode($utf8_string)}) {
|
---|
685 | $unicode_string .= chr($unicode_value);
|
---|
686 | }
|
---|
687 | return $unicode_string;
|
---|
688 | }
|
---|
689 |
|
---|
690 |
|
---|
691 | sub convert_unicode_string_to_utf8_string
|
---|
692 | {
|
---|
693 | my $self = shift(@_);
|
---|
694 | my $unicode_string = shift(@_);
|
---|
695 |
|
---|
696 | my @unicode_array;
|
---|
697 | for (my $i = 0; $i < length($unicode_string); $i++) {
|
---|
698 | push(@unicode_array, ord(substr($unicode_string, $i, 1)));
|
---|
699 | }
|
---|
700 | return &unicode::unicode2utf8(\@unicode_array);
|
---|
701 | }
|
---|
702 |
|
---|
703 |
|
---|
704 | sub generate_partition_start
|
---|
705 | {
|
---|
706 | my $self = shift(@_);
|
---|
707 | my $metadata_value = shift(@_);
|
---|
708 | my $lastpartitionend = shift(@_);
|
---|
709 | my $partition_name_length = shift(@_);
|
---|
710 |
|
---|
711 | if ($partition_name_length) {
|
---|
712 | return substr($metadata_value, 0, $partition_name_length);
|
---|
713 | }
|
---|
714 |
|
---|
715 | my $partitionstart = substr($metadata_value, 0, 1);
|
---|
716 | if ($partitionstart le $lastpartitionend) {
|
---|
717 | $partitionstart = substr($metadata_value, 0, 2);
|
---|
718 | # Give up after three characters
|
---|
719 | if ($partitionstart le $lastpartitionend) {
|
---|
720 | $partitionstart = substr($metadata_value, 0, 3);
|
---|
721 | }
|
---|
722 | }
|
---|
723 |
|
---|
724 | return $partitionstart;
|
---|
725 | }
|
---|
726 |
|
---|
727 |
|
---|
728 | sub generate_partition_end
|
---|
729 | {
|
---|
730 | my $self = shift(@_);
|
---|
731 | my $metadata_value = shift(@_);
|
---|
732 | my $partitionstart = shift(@_);
|
---|
733 | my $partition_name_length = shift(@_);
|
---|
734 |
|
---|
735 | if ($partition_name_length) {
|
---|
736 | return substr($metadata_value, 0, $partition_name_length);
|
---|
737 | }
|
---|
738 |
|
---|
739 | my $partitionend = substr($metadata_value, 0, length($partitionstart));
|
---|
740 | if ($partitionend gt $partitionstart) {
|
---|
741 | $partitionend = substr($metadata_value, 0, 1);
|
---|
742 | if ($partitionend le $partitionstart) {
|
---|
743 | $partitionend = substr($metadata_value, 0, 2);
|
---|
744 | # Give up after three characters
|
---|
745 | if ($partitionend le $partitionstart) {
|
---|
746 | $partitionend = substr($metadata_value, 0, 3);
|
---|
747 | }
|
---|
748 | }
|
---|
749 | }
|
---|
750 |
|
---|
751 | return $partitionend;
|
---|
752 | }
|
---|
753 |
|
---|
754 |
|
---|
755 | sub add_hlist_partition
|
---|
756 | {
|
---|
757 | my $self = shift(@_);
|
---|
758 | my @metadata_groups = @{shift(@_)};
|
---|
759 | my $classifier_node = shift(@_);
|
---|
760 | my $partitionname = shift(@_);
|
---|
761 | my $metadata_value_to_OIDs_hash_ref = shift(@_);
|
---|
762 |
|
---|
763 | # Create an hlist partition
|
---|
764 | # Note that we don't need to convert from unicode-aware strings
|
---|
765 | # to utf8 here, as that is handled elsewhere in the code
|
---|
766 | my %child_classifier_node = ( 'Title' => $partitionname, #'Title' => $self->convert_unicode_string_to_utf8_string($partitionname),
|
---|
767 | 'childtype' => "VList",
|
---|
768 | 'contains' => [] );
|
---|
769 |
|
---|
770 | # Add the children to the hlist partition
|
---|
771 | $self->add_vlist(\@metadata_groups, \%child_classifier_node, $metadata_value_to_OIDs_hash_ref);
|
---|
772 | push(@{$classifier_node->{'contains'}}, \%child_classifier_node);
|
---|
773 | }
|
---|
774 |
|
---|
775 |
|
---|
776 | sub add_vlist
|
---|
777 | {
|
---|
778 | my $self = shift(@_);
|
---|
779 | my @metadata_groups = @{shift(@_)};
|
---|
780 | my $classifier_node = shift(@_);
|
---|
781 | my $metadata_value_to_OIDs_hash_ref = shift(@_);
|
---|
782 |
|
---|
783 | my $metadata_group = shift(@metadata_groups);
|
---|
784 | $classifier_node->{'mdtype'} = $metadata_group;
|
---|
785 |
|
---|
786 | # Create an entry in the vlist for each value
|
---|
787 | foreach my $metadata_value ($self->sort_metadata_values_array(keys(%{$metadata_value_to_OIDs_hash_ref})))
|
---|
788 | {
|
---|
789 | my @OIDs = @{$metadata_value_to_OIDs_hash_ref->{$metadata_value}};
|
---|
790 | # If there is only one item and 'bookshelf_type' is not always (ie. never or duplicate_only), add the item to the list
|
---|
791 | if (@OIDs == 1 && $self->{$metadata_group . ".bookshelf_type"} ne "always") {
|
---|
792 | my $OID = $OIDs[0];
|
---|
793 | my $offset = $self->metadata_offset($metadata_group, $OID, $metadata_value);
|
---|
794 | push(@{$classifier_node->{'contains'}}, { 'OID' => $OID, 'offset' => $offset });
|
---|
795 | }
|
---|
796 | # If 'bookshelf_type' is 'never', list all the items even if there are duplicated values
|
---|
797 | elsif ($self->{$metadata_group . ".bookshelf_type"} eq "never") {
|
---|
798 | @OIDs = $self->sort_leaf_items(\@OIDs);
|
---|
799 | foreach my $OID (@OIDs) {
|
---|
800 | my $offset = $self->metadata_offset($metadata_group, $OID, $metadata_value);
|
---|
801 | push(@{$classifier_node->{'contains'}}, { 'OID' => $OID , 'offset' => $offset });
|
---|
802 | }
|
---|
803 |
|
---|
804 | }
|
---|
805 | # Otherwise create a sublist (bookshelf) for the metadata value
|
---|
806 | else {
|
---|
807 | # Note that we don't need to convert from unicode-aware strings
|
---|
808 | # to utf8 here, as that is handled elsewhere in the code
|
---|
809 | my %child_classifier_node = ( 'Title' => $metadata_value, # 'Title' => $self->convert_unicode_string_to_utf8_string($metadata_value),
|
---|
810 | 'childtype' => "VList",
|
---|
811 | 'mdtype' => $metadata_group,
|
---|
812 | 'contains' => [] );
|
---|
813 |
|
---|
814 | #@OIDs = $self->sort_leaf_items(\@OIDs);
|
---|
815 | # If there are metadata elements remaining, recursively apply the process
|
---|
816 | if (@metadata_groups > 0) {
|
---|
817 | my $next_metadata_group = $metadata_groups[0];
|
---|
818 | $child_classifier_node{'childtype'} = $self->{$next_metadata_group . ".list_type"};
|
---|
819 |
|
---|
820 | # separate metadata into those that below in the next/sub-metadata_group
|
---|
821 | # and those that below at the current level's metadata_group
|
---|
822 |
|
---|
823 | my $OID_to_metadata_values_hash_ref = $self->{$next_metadata_group . ".list"};
|
---|
824 | my @current_level_OIDs = ();
|
---|
825 | my @next_level_OIDs = ();
|
---|
826 | foreach my $OID (@OIDs)
|
---|
827 | {
|
---|
828 | if ($OID_to_metadata_values_hash_ref->{$OID}) {
|
---|
829 | push(@next_level_OIDs, $OID);
|
---|
830 | } else {
|
---|
831 | push(@current_level_OIDs, $OID);
|
---|
832 | }
|
---|
833 | }
|
---|
834 | # recursively process those docs belonging to the sub-metadata_group
|
---|
835 | $self->add_level(\@metadata_groups, \@next_level_OIDs, \%child_classifier_node);
|
---|
836 |
|
---|
837 | # For those docs that don't belong in the sub/next_metadata_group, but which belong
|
---|
838 | # at this level, just add the documents as children of this list at the current level
|
---|
839 | @current_level_OIDs = $self->sort_leaf_items(\@current_level_OIDs);
|
---|
840 | foreach my $current_level_OID (@current_level_OIDs) {
|
---|
841 | my $offset = $self->metadata_offset($metadata_group, $current_level_OID, $metadata_value);
|
---|
842 | push(@{$child_classifier_node{'contains'}}, { 'OID' => $current_level_OID , 'offset' => $offset });
|
---|
843 | }
|
---|
844 | }
|
---|
845 | # Otherwise just add the documents as children of this list
|
---|
846 | else {
|
---|
847 | @OIDs = $self->sort_leaf_items(\@OIDs);
|
---|
848 | foreach my $OID (@OIDs) {
|
---|
849 | my $offset = $self->metadata_offset($metadata_group, $OID, $metadata_value);
|
---|
850 | push(@{$child_classifier_node{'contains'}}, { 'OID' => $OID , 'offset' => $offset });
|
---|
851 | }
|
---|
852 |
|
---|
853 | }
|
---|
854 |
|
---|
855 | # Add the sublist to the list
|
---|
856 | push(@{$classifier_node->{'contains'}}, \%child_classifier_node);
|
---|
857 | }
|
---|
858 | }
|
---|
859 | }
|
---|
860 |
|
---|
861 | sub metadata_offset
|
---|
862 | {
|
---|
863 | my $self = shift(@_);
|
---|
864 | my $metadata_group = shift(@_);
|
---|
865 | my $OID = shift(@_);
|
---|
866 | my $metadata_value = shift(@_);
|
---|
867 |
|
---|
868 | my $OID_to_metadata_values_hash_ref = $self->{$metadata_group . ".list"};
|
---|
869 | my @metadata_values = @{$OID_to_metadata_values_hash_ref->{$OID}};
|
---|
870 | for (my $i = 0; $i < scalar(@metadata_values); $i++) {
|
---|
871 | if ($metadata_value eq $metadata_values[$i]) {
|
---|
872 | return $i;
|
---|
873 | }
|
---|
874 | }
|
---|
875 |
|
---|
876 | return 0;
|
---|
877 | }
|
---|
878 |
|
---|
879 | sub sort_leaf_items
|
---|
880 | {
|
---|
881 | my $self = shift(@_);
|
---|
882 | my @OIDs = @{shift(@_)};
|
---|
883 | # my $classifier_node = shift(@_);
|
---|
884 |
|
---|
885 | # Sort leaf nodes and add to list
|
---|
886 | my @sort_leaf_nodes_using_metadata_groups = @{$self->{'sort_leaf_nodes_using_metadata_groups'}};
|
---|
887 | foreach my $sort_leaf_nodes_usingmetaelem (reverse @sort_leaf_nodes_using_metadata_groups) {
|
---|
888 | my $OID_to_metadata_values_hash_ref = $self->{$sort_leaf_nodes_usingmetaelem . ".list"};
|
---|
889 | # Force a stable sort (Perl 5.6's sort isn't stable)
|
---|
890 | # !! The [0] bits aren't ideal (multiple metadata values) !!
|
---|
891 | @OIDs = @OIDs[ sort {
|
---|
892 | if (defined($OID_to_metadata_values_hash_ref->{$OIDs[$a]} && defined($OID_to_metadata_values_hash_ref->{$OIDs[$b]})))
|
---|
893 | {
|
---|
894 | $OID_to_metadata_values_hash_ref->{$OIDs[$a]}[0] cmp $OID_to_metadata_values_hash_ref->{$OIDs[$b]}[0];
|
---|
895 | }
|
---|
896 | else
|
---|
897 | {
|
---|
898 | $a <=> $b;
|
---|
899 | }
|
---|
900 | } 0..$#OIDs ];
|
---|
901 | }
|
---|
902 | if ($self->{'reverse_sort_leaf_nodes'}) {
|
---|
903 | #print STDERR "reversing\n";
|
---|
904 | return reverse @OIDs;
|
---|
905 | }
|
---|
906 | return @OIDs;
|
---|
907 | }
|
---|
908 |
|
---|
909 |
|
---|
910 |
|
---|
911 | sub sort_metadata_values_array
|
---|
912 | {
|
---|
913 | my $self = shift(@_);
|
---|
914 | my @metadata_values = @_;
|
---|
915 |
|
---|
916 | if ($self->{'unicode_collator'}) {
|
---|
917 | return $self->{'unicode_collator'}->sort(@metadata_values);
|
---|
918 | }
|
---|
919 | else {
|
---|
920 | return sort(@metadata_values);
|
---|
921 | }
|
---|
922 | }
|
---|
923 |
|
---|
924 |
|
---|
925 | 1;
|
---|