| 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' => "constant_size",
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| 50 | 'desc' => "{List.level_partition.constant_size}" },
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| 51 | { 'name' => "per_letter_fixed_size",
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| 52 | 'desc' => "{List.level_partition.per_letter_fixed_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 | my $bookshelf_type_list =
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| 57 | [ { 'name' => "always",
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| 58 | 'desc' => "{List.bookshelf_type.always}" },
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| 59 | { 'name' => "duplicate_only",
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| 60 | 'desc' => "{List.bookshelf_type.duplicate_only}" },
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| 61 | { 'name' => "never",
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| 62 | 'desc' => "{List.bookshelf_type.never}" } ];
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| 63 |
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| 64 | my $arguments =
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| 65 | [ { 'name' => "metadata",
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| 66 | 'desc' => "{List.metadata}",
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| 67 | 'type' => "metadata",
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| 68 | 'reqd' => "yes" },
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| 69 |
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| 70 | # The interesting options
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| 71 | { 'name' => "bookshelf_type",
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| 72 | 'desc' => "{List.bookshelf_type}",
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| 73 | 'type' => "enum",
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| 74 | 'list' => $bookshelf_type_list,
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| 75 | 'deft' => "never" },
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| 76 | { 'name' => "classify_sections",
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| 77 | 'desc' => "{List.classify_sections}",
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| 78 | 'type' => "flag" },
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| 79 | { 'name' => "partition_type_within_level",
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| 80 | 'desc' => "{List.partition_type_within_level}",
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| 81 | 'type' => "string",
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| 82 | 'deft' => "none" },
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| 83 | { 'name' => "partition_size_within_level",
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| 84 | 'desc' => "{List.partition_size_within_level}",
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| 85 | 'type' => "int",
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| 86 | 'range' => "1,",
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| 87 | 'deft' => "39" },
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| 88 | { 'name' => "partition_name_length",
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| 89 | 'desc' => "{List.partition_name_length}",
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| 90 | 'type' => "string" },
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| 91 | { 'name' => "sort_leaf_nodes_using",
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| 92 | 'desc' => "{List.sort_leaf_nodes_using}",
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| 93 | 'type' => "metadata",
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| 94 | 'deft' => "Title" },
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| 95 | { 'name' => "sort_using_unicode_collation",
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| 96 | 'desc' => "{List.sort_using_unicode_collation}",
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| 97 | 'type' => "flag" },
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| 98 | { 'name' => "use_hlist_for",
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| 99 | 'desc' => "{List.use_hlist_for}",
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| 100 | 'type' => "string" },
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| 101 | { 'name' => "removeprefix",
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| 102 | 'desc' => "{BasClas.removeprefix}",
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| 103 | 'type' => "regexp" },
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| 104 | { 'name' => "removesuffix",
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| 105 | 'desc' => "{BasClas.removesuffix}",
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| 106 | 'type' => "regexp" } ];
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| 107 |
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| 108 | my $options = { 'name' => "List",
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| 109 | 'desc' => "{List.desc}",
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| 110 | 'abstract' => "no",
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| 111 | 'inherits' => "yes",
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| 112 | 'args' => $arguments };
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| 113 |
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| 114 |
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| 115 | sub new
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| 116 | {
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| 117 | my ($class) = shift(@_);
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| 118 | my ($classifierslist, $inputargs, $hashArgOptLists) = @_;
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| 119 | push(@$classifierslist, $class);
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| 120 |
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| 121 | push(@{$hashArgOptLists->{"ArgList"}}, @{$arguments});
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| 122 | push(@{$hashArgOptLists->{"OptList"}}, $options);
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| 123 |
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| 124 | my $self = new BaseClassifier($classifierslist, $inputargs, $hashArgOptLists);
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| 125 |
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| 126 | if ($self->{'info_only'}) {
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| 127 | # don't worry about any options etc
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| 128 | return bless $self, $class;
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| 129 | }
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| 130 |
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| 131 | # The metadata elements to use (required)
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| 132 | if (!$self->{'metadata'}) {
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| 133 | die "Error: No metadata fields specified for List.\n";
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| 134 | }
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| 135 | my @metadata_groups = split(/\//, $self->{'metadata'});
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| 136 | $self->{'metadata_groups'} = \@metadata_groups;
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| 137 |
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| 138 | # The classifier button name (default: the first metadata element specified)
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| 139 | if (!$self->{'buttonname'}) {
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| 140 | my $first_metadata_group = $metadata_groups[0];
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| 141 | my $first_metadata_element = (split(/\;/, $first_metadata_group))[0];
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| 142 | $self->{'buttonname'} = $self->generate_title_from_metadata($first_metadata_element);
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| 143 | }
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| 144 |
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| 145 | # Whether to group items into a bookshelf, (must be 'always' for all metadata fields except the last)
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| 146 | foreach my $metadata_group (@metadata_groups) {
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| 147 | $self->{$metadata_group . ".bookshelf_type"} = "always";
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| 148 | }
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| 149 | my $last_metadata_group = $metadata_groups[$#metadata_groups];
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| 150 | # Default: duplicate_only, ie. leave leaf nodes ungrouped (equivalent to AZCompactList -mingroup 2)
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| 151 | $self->{$last_metadata_group . ".bookshelf_type"} = $self->{'bookshelf_type'};
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| 152 |
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| 153 | # Whether to use an hlist or a vlist for each level in the hierarchy (default: vlist)
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| 154 | foreach my $metadata_group (@metadata_groups) {
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| 155 | $self->{$metadata_group . ".list_type"} = "VList";
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| 156 | }
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| 157 | foreach my $metadata_group (split(/\,/, $self->{'use_hlist_for'})) {
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| 158 | $self->{$metadata_group . ".list_type"} = "HList";
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| 159 | }
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| 160 |
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| 161 | # How the items are grouped into partitions (default: no partition)
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| 162 | # for each level (metadata group), separated by '/'
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| 163 | if (!$self->{"partition_type_within_level"}) {
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| 164 | foreach my $metadata_group (@metadata_groups) {
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| 165 | $self->{$metadata_group . ".partition_type_within_level"} = "none";
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| 166 | }
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| 167 | } else {
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| 168 | my @partition_type_within_levellist = split(/\//, $self->{'partition_type_within_level'});
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| 169 | foreach my $metadata_group (@metadata_groups) {
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| 170 | my $partition_type_within_levelelem = shift(@partition_type_within_levellist);
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| 171 | if (defined($partition_type_within_levelelem)) {
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| 172 | $self->{$metadata_group . ".partition_type_within_level"} = $partition_type_within_levelelem;
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| 173 | }
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| 174 | else {
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| 175 | $self->{$metadata_group . ".partition_type_within_level"} = $self->{$metadata_groups[0] . ".partition_type_within_level"};
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| 176 | }
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| 177 | }
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| 178 | }
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| 179 |
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| 180 | # The number of items in each partition
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| 181 | if (!$self->{'partition_size_within_level'}) {
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| 182 | # Default: 20
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| 183 | foreach my $metadata_group (@metadata_groups) {
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| 184 | $self->{$metadata_group . ".partition_size_within_level"} = 20;
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| 185 | }
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| 186 | }
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| 187 | else {
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| 188 | my @partition_size_within_levellist = split(/\//, $self->{'partition_size_within_level'});
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| 189 |
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| 190 | # Assign values based on the partition_size_within_level parameter
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| 191 | foreach my $metadata_group (@metadata_groups) {
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| 192 | my $partition_size_within_levelelem = shift(@partition_size_within_levellist);
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| 193 | if (defined($partition_size_within_levelelem)) {
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| 194 | $self->{$metadata_group . ".partition_size_within_level"} = $partition_size_within_levelelem;
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| 195 | }
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| 196 | else {
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| 197 | $self->{$metadata_group . ".partition_size_within_level"} = $self->{$metadata_groups[0] . ".partition_size_within_level"};
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| 198 | }
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| 199 | }
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| 200 | }
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| 201 |
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| 202 | # The removeprefix and removesuffix expressions
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| 203 | if ($self->{'removeprefix'}) {
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| 204 | # If there are more than one expressions, use '' to quote each experession and '/' to separate
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| 205 | my @removeprefix_exprs_within_levellist = split(/'\/'/, $self->{'removeprefix'});
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| 206 |
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| 207 | foreach my $metadata_group (@metadata_groups) {
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| 208 | my $removeprefix_expr_within_levelelem = shift(@removeprefix_exprs_within_levellist);
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| 209 | if (defined($removeprefix_expr_within_levelelem) && $removeprefix_expr_within_levelelem ne "") {
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| 210 | # Remove the other ' at the beginning and the end if there is any
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| 211 | $removeprefix_expr_within_levelelem =~ s/^'//;
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| 212 | $removeprefix_expr_within_levelelem =~ s/'$//;
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| 213 | # Remove the extra ^ at the beginning
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| 214 | $removeprefix_expr_within_levelelem =~ s/^\^//;
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| 215 | $self->{$metadata_group . ".remove_prefix_expr"} = $removeprefix_expr_within_levelelem;
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| 216 | } else {
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| 217 | $self->{$metadata_group . ".remove_prefix_expr"} = $self->{$metadata_groups[0] . ".remove_prefix_expr"};
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| 218 | }
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| 219 | }
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| 220 | }
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| 221 | if ($self->{'removesuffix'}) {
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| 222 | my @removesuffix_exprs_within_levellist = split(/'\/'/, $self->{'removesuffix'});
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| 223 |
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| 224 | foreach my $metadata_group (@metadata_groups) {
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| 225 | my $removesuffix_expr_within_levelelem = shift(@removesuffix_exprs_within_levellist);
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| 226 | if (defined($removesuffix_expr_within_levelelem) && $removesuffix_expr_within_levelelem ne "") {
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| 227 | $removesuffix_expr_within_levelelem =~ s/^'//;
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| 228 | $removesuffix_expr_within_levelelem =~ s/'$//;
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| 229 | # Remove the extra $ at the end
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| 230 | $removesuffix_expr_within_levelelem =~ s/\$$//;
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| 231 | $self->{$metadata_group . ".remove_suffix_expr"} = $removesuffix_expr_within_levelelem;
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| 232 | } else {
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| 233 | $self->{$metadata_group . ".remove_suffix_expr"} = $self->{$metadata_groups[0] . ".remove_suffix_expr"};
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| 234 | }
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| 235 | }
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| 236 | }
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| 237 |
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| 238 | # The metadata elements to use to sort the leaf nodes (default: Title)
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| 239 | my @sort_leaf_nodes_using_metadata_groups = ( "Title" );
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| 240 | if ($self->{'sort_leaf_nodes_using'}) {
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| 241 | @sort_leaf_nodes_using_metadata_groups = split(/\|/, $self->{'sort_leaf_nodes_using'});
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| 242 | }
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| 243 | $self->{'sort_leaf_nodes_using_metadata_groups'} = \@sort_leaf_nodes_using_metadata_groups;
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| 244 |
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| 245 | # Create an instance of the Unicode::Collate object if better Unicode sorting is desired
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| 246 | if ($self->{'sort_using_unicode_collation'}) {
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| 247 | # To use this you first need to download the allkeys.txt file from
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| 248 | # http://www.unicode.org/Public/UCA/latest/allkeys.txt and put it in the Perl
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| 249 | # Unicode/Collate directory.
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| 250 | require Unicode::Collate;
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| 251 | $self->{'unicode_collator'} = Unicode::Collate->new();
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| 252 | }
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| 253 |
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| 254 | # An empty array for the document OIDs
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| 255 | $self->{'OIDs'} = [];
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| 256 |
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| 257 | return bless $self, $class;
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| 258 | }
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| 259 |
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| 260 |
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| 261 | sub init
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| 262 | {
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| 263 | # Nothing to do...
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| 264 | }
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| 265 |
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| 266 |
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| 267 | # Called for each document in the collection
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| 268 | sub classify
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| 269 | {
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| 270 | my $self = shift(@_);
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| 271 | my ($doc_obj,$edit_mode) = @_;
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| 272 |
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| 273 | # If "-classify_sections" is set, classify every section of the document
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| 274 | if ($self->{'classify_sections'}) {
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| 275 | my $section = $doc_obj->get_next_section($doc_obj->get_top_section());
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| 276 | while (defined $section) {
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| 277 | $self->classify_section($doc_obj, $doc_obj->get_OID() . ".$section", $section, $edit_mode);
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| 278 | $section = $doc_obj->get_next_section($section);
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| 279 | }
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| 280 | }
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| 281 | # Otherwise just classify the top document section
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| 282 | else {
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| 283 | $self->classify_section($doc_obj, $doc_obj->get_OID(), $doc_obj->get_top_section(), $edit_mode);
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| 284 | }
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| 285 | }
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| 286 |
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| 287 |
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| 288 | sub classify_section
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| 289 | {
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| 290 | my $self = shift(@_);
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| 291 | my ($doc_obj,$section_OID,$section,$edit_mode) = @_;
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| 292 |
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| 293 | my @metadata_groups = @{$self->{'metadata_groups'}};
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| 294 |
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| 295 | # Only classify the section if it has a value for one of the metadata elements in the first group
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| 296 | my $classify_section = 0;
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| 297 | my $first_metadata_group = $metadata_groups[0];
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| 298 | foreach my $first_metadata_group_element (split(/\;/, $first_metadata_group)) {
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| 299 | my $first_metadata_group_element_value = $doc_obj->get_metadata_element($section, $first_metadata_group_element);
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| 300 |
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| 301 | # Remove prefix/suffix if requested
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| 302 | my $remove_prefix_expr = $self->{$first_metadata_group_element . ".remove_prefix_expr"};
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| 303 | if (defined $remove_prefix_expr && $remove_prefix_expr ne "") {
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| 304 | $first_metadata_group_element_value =~ s/^$remove_prefix_expr//;
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| 305 | }
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| 306 | my $remove_suffix_expr = $self->{$first_metadata_group_element . ".remove_suffix_expr"};
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| 307 | if (defined $remove_suffix_expr && $remove_suffix_expr ne "") {
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| 308 | $first_metadata_group_element_value =~ s/$remove_suffix_expr$//;
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| 309 | }
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| 310 |
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| 311 | if (defined($first_metadata_group_element_value) && $first_metadata_group_element_value ne "") {
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| 312 | # This section must be included in the classifier
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| 313 | $classify_section = 1;
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| 314 | last;
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| 315 | }
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| 316 | }
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| 317 |
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| 318 | # We're not classifying this section because it doesn't have the required metadata
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| 319 | return if (!$classify_section);
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| 320 |
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| 321 | if (($edit_mode eq "delete") || ($edit_mode eq "update")) {
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| 322 | $self->oid_array_delete($section_OID,'OIDs');
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| 323 | if ($edit_mode eq "delete") {
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| 324 | return;
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| 325 | }
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| 326 | }
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| 327 |
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| 328 | # Otherwise, include this section in the classifier
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| 329 | push(@{$self->{'OIDs'}}, $section_OID);
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| 330 |
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| 331 | # Create a hash for the metadata values of each metadata element we're interested in
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| 332 | my %metadata_groups_done = ();
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| 333 | foreach my $metadata_group (@metadata_groups, @{$self->{'sort_leaf_nodes_using_metadata_groups'}}) {
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| 334 | # Take care not to do a metadata group more than once
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| 335 | unless ($metadata_groups_done{$metadata_group}) {
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| 336 | foreach my $metadata_element (split(/\;/, $metadata_group)) {
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| 337 | my $remove_prefix_expr = $self->{$metadata_element . ".remove_prefix_expr"};
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| 338 | my $remove_suffix_expr = $self->{$metadata_element . ".remove_suffix_expr"};
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| 339 | my @metadata_values = @{$doc_obj->get_metadata($section, $metadata_element)};
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| 340 | foreach my $metadata_value (@metadata_values) {
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| 341 | # Strip leading and trailing whitespace
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| 342 | $metadata_value =~ s/^\s*//;
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| 343 | $metadata_value =~ s/\s*$//;
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| 344 |
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| 345 | # Remove prefix/suffix if requested
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| 346 | if (defined $remove_prefix_expr && $remove_prefix_expr ne "") {
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| 347 | $metadata_value =~ s/^$remove_prefix_expr//;
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| 348 | }
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| 349 | if (defined $remove_suffix_expr && $remove_suffix_expr ne "") {
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| 350 | $metadata_value =~ s/$remove_suffix_expr$//;
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| 351 | }
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| 352 |
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| 353 | # Convert the metadata value from a UTF-8 string to a Unicode string
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| 354 | # This means that length() and substr() work properly
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| 355 | # We need to be careful to convert classifier node title values back to UTF-8, however
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| 356 | my $metadata_value_unicode_string = $self->convert_utf8_string_to_unicode_string($metadata_value);
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| 357 |
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| 358 | # Add the metadata value into the list for this combination of metadata group and section
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| 359 | push(@{$self->{$metadata_group . ".list"}->{$section_OID}}, $metadata_value_unicode_string);
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| 360 | }
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| 361 | last if (@metadata_values > 0);
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| 362 | }
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| 363 |
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| 364 | $metadata_groups_done{$metadata_group} = 1;
|
|---|
| 365 | }
|
|---|
| 366 | }
|
|---|
| 367 | }
|
|---|
| 368 |
|
|---|
| 369 |
|
|---|
| 370 | sub get_classify_info
|
|---|
| 371 | {
|
|---|
| 372 | my $self = shift(@_);
|
|---|
| 373 |
|
|---|
| 374 | # The metadata groups to classify by
|
|---|
| 375 | my @metadata_groups = @{$self->{'metadata_groups'}};
|
|---|
| 376 | my $first_metadata_group = $metadata_groups[0];
|
|---|
| 377 |
|
|---|
| 378 | # The OID values of the documents to include in the classifier
|
|---|
| 379 | my @OIDs = @{$self->{'OIDs'}};
|
|---|
| 380 |
|
|---|
| 381 | # Create the root node of the classification hierarchy
|
|---|
| 382 | my %classifier_node = ( 'thistype' => "Invisible",
|
|---|
| 383 | 'childtype' => $self->{$first_metadata_group . ".list_type"},
|
|---|
| 384 | 'Title' => $self->{'buttonname'},
|
|---|
| 385 | 'contains' => [],
|
|---|
| 386 | 'mdtype' => $first_metadata_group );
|
|---|
| 387 |
|
|---|
| 388 | # Recursively create the classification hierarchy, one level for each metadata group
|
|---|
| 389 | $self->add_level(\@metadata_groups, \@OIDs, \%classifier_node);
|
|---|
| 390 | return \%classifier_node;
|
|---|
| 391 | }
|
|---|
| 392 |
|
|---|
| 393 |
|
|---|
| 394 | sub add_level
|
|---|
| 395 | {
|
|---|
| 396 | my $self = shift(@_);
|
|---|
| 397 | my @metadata_groups = @{shift(@_)};
|
|---|
| 398 | my @OIDs = @{shift(@_)};
|
|---|
| 399 | my $classifier_node = shift(@_);
|
|---|
| 400 | # print STDERR "\nAdding AZ list for " . $classifier_node->{'Title'} . "\n";
|
|---|
| 401 |
|
|---|
| 402 | my $metadata_group = $metadata_groups[0];
|
|---|
| 403 | # print STDERR "Processing metadata group: " . $metadata_group . "\n";
|
|---|
| 404 | # print STDERR "Number of OID values: " . @OIDs . "\n";
|
|---|
| 405 |
|
|---|
| 406 | if (!defined($self->{$metadata_group . ".list"})) {
|
|---|
| 407 | print STDERR "Warning: No metadata values assigned to $metadata_group.\n";
|
|---|
| 408 | return;
|
|---|
| 409 | }
|
|---|
| 410 |
|
|---|
| 411 | # Create a mapping from metadata value to OID
|
|---|
| 412 | my $OID_to_metadata_values_hash_ref = $self->{$metadata_group . ".list"};
|
|---|
| 413 | my %metadata_value_to_OIDs_hash = ();
|
|---|
| 414 | foreach my $OID (@OIDs)
|
|---|
| 415 | {
|
|---|
| 416 | if ($OID_to_metadata_values_hash_ref->{$OID})
|
|---|
| 417 | {
|
|---|
| 418 | my @metadata_values = @{$OID_to_metadata_values_hash_ref->{$OID}};
|
|---|
| 419 | foreach my $metadata_value (@metadata_values)
|
|---|
| 420 | {
|
|---|
| 421 | push(@{$metadata_value_to_OIDs_hash{$metadata_value}}, $OID);
|
|---|
| 422 | }
|
|---|
| 423 | }
|
|---|
| 424 | }
|
|---|
| 425 | # print STDERR "Number of distinct values: " . scalar(keys %metadata_value_to_OIDs_hash) . "\n";
|
|---|
| 426 |
|
|---|
| 427 | # Partition the values (if necessary)
|
|---|
| 428 | my $partition_type_within_level = $self->{$metadata_group . ".partition_type_within_level"};
|
|---|
| 429 | if ($partition_type_within_level =~ /^per_letter$/i) {
|
|---|
| 430 | # Generate one hlist for each letter
|
|---|
| 431 | my @sortedmetadata_values = $self->sort_metadata_values_array(keys(%metadata_value_to_OIDs_hash));
|
|---|
| 432 | my %metadata_value_to_OIDs_subhash = ();
|
|---|
| 433 |
|
|---|
| 434 | my $lastpartition = substr($sortedmetadata_values[0], 0, 1);
|
|---|
| 435 | foreach my $metadata_value (@sortedmetadata_values) {
|
|---|
| 436 | my $metadata_valuepartition = substr($metadata_value, 0, 1);
|
|---|
| 437 |
|
|---|
| 438 | # Is this the start of a new partition?
|
|---|
| 439 | if ($metadata_valuepartition ne $lastpartition) {
|
|---|
| 440 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $lastpartition, \%metadata_value_to_OIDs_subhash);
|
|---|
| 441 | %metadata_value_to_OIDs_subhash = ();
|
|---|
| 442 | $lastpartition = $metadata_valuepartition;
|
|---|
| 443 | }
|
|---|
| 444 |
|
|---|
| 445 | $metadata_value_to_OIDs_subhash{$metadata_value} = $metadata_value_to_OIDs_hash{$metadata_value};
|
|---|
| 446 | }
|
|---|
| 447 |
|
|---|
| 448 | # Don't forget to add the last partition
|
|---|
| 449 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $lastpartition, \%metadata_value_to_OIDs_subhash);
|
|---|
| 450 |
|
|---|
| 451 | # The partitions are stored in an HList
|
|---|
| 452 | $classifier_node->{'childtype'} = "HList";
|
|---|
| 453 | }
|
|---|
| 454 | elsif ($partition_type_within_level =~ /^per_letter_fixed_size$/i) {
|
|---|
| 455 | # Generate hlist based on the first letter of the metadata value (like per_letter) but with restriction on the partition size
|
|---|
| 456 | # If a letter has fewer items than specified by the "partition_size_within_level", then group them together if possible
|
|---|
| 457 | # If a letter has more items than specified, split into several hlists.
|
|---|
| 458 | # Depends on the bookshelf_type, one item can be either a document (when bookshelf_type is "never") or a metadata value (otherwise)
|
|---|
| 459 | my $partition_size_within_level = $self->{$metadata_group . ".partition_size_within_level"};
|
|---|
| 460 | my @sortedmetadata_values = $self->sort_metadata_values_array(keys(%metadata_value_to_OIDs_hash));
|
|---|
| 461 | my $bookshelf_type = $self->{$metadata_group . ".bookshelf_type"};
|
|---|
| 462 |
|
|---|
| 463 | # Separate values by their first letter, each form a bucket, like the per_letter partition type
|
|---|
| 464 | my $last_partition = substr($sortedmetadata_values[0], 0, 1);
|
|---|
| 465 | my %partition_buckets = ();
|
|---|
| 466 | my @metadata_values_in_bucket = ();
|
|---|
| 467 | my $num_items_in_bucket = 0;
|
|---|
| 468 | foreach my $metadata_value (@sortedmetadata_values) {
|
|---|
| 469 | my $metadata_valuepartition = substr($metadata_value, 0, 1);
|
|---|
| 470 | if ($metadata_valuepartition ne $last_partition) {
|
|---|
| 471 | my @temp_array = @metadata_values_in_bucket;
|
|---|
| 472 | # 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
|
|---|
| 473 | my %partition_info = ();
|
|---|
| 474 | $partition_info{'metadata_values'} = \@temp_array;
|
|---|
| 475 | $partition_info{'size'} = $num_items_in_bucket;
|
|---|
| 476 | $partition_buckets{$last_partition} = \%partition_info;
|
|---|
| 477 |
|
|---|
| 478 | @metadata_values_in_bucket = ($metadata_value);
|
|---|
| 479 | $num_items_in_bucket = $bookshelf_type eq "never" ? scalar(@{$metadata_value_to_OIDs_hash{$metadata_value}}) : scalar(@metadata_values_in_bucket);
|
|---|
| 480 | $last_partition = $metadata_valuepartition;
|
|---|
| 481 | } else {
|
|---|
| 482 | $num_items_in_bucket += $bookshelf_type eq "never" ? scalar(@{$metadata_value_to_OIDs_hash{$metadata_value}}) : scalar(@metadata_values_in_bucket);
|
|---|
| 483 | push (@metadata_values_in_bucket, $metadata_value);
|
|---|
| 484 | }
|
|---|
| 485 | }
|
|---|
| 486 | # Last one
|
|---|
| 487 | my %partition_info = ();
|
|---|
| 488 | $partition_info{'metadata_values'} = \@metadata_values_in_bucket;
|
|---|
| 489 | $partition_info{'size'} = $num_items_in_bucket;
|
|---|
| 490 | $partition_buckets{$last_partition} = \%partition_info;
|
|---|
| 491 |
|
|---|
| 492 | my @partition_keys = $self->sort_metadata_values_array(keys(%partition_buckets));
|
|---|
| 493 | for (my $i = 0; $i < scalar(@partition_keys) - 1; $i++) {
|
|---|
| 494 | my $partition = $partition_keys[$i];
|
|---|
| 495 | my $items_in_partition = $partition_buckets{$partition}->{'size'};
|
|---|
| 496 | # Merge small buckets together, but keep the numeric bucket apart
|
|---|
| 497 | if ($items_in_partition < $partition_size_within_level) {
|
|---|
| 498 | my $items_in_next_partition = $partition_buckets{$partition_keys[$i+1]}->{'size'};
|
|---|
| 499 | if ($items_in_partition + $items_in_next_partition <= $partition_size_within_level
|
|---|
| 500 | && !(($partition =~ /^[^0-9]/ && $partition_keys[$i+1] =~ /^[0-9]/)
|
|---|
| 501 | || ($partition =~ /^[0-9]/ && $partition_keys[$i+1] =~ /^[^0-9]/))) {
|
|---|
| 502 | foreach my $metadata_value_to_merge (@{$partition_buckets{$partition}->{'metadata_values'}}) {
|
|---|
| 503 | push(@{$partition_buckets{$partition_keys[$i+1]}->{'metadata_values'}}, $metadata_value_to_merge);
|
|---|
| 504 | }
|
|---|
| 505 | $partition_buckets{$partition_keys[$i+1]}->{'size'} += $items_in_partition;
|
|---|
| 506 | delete $partition_buckets{$partition};
|
|---|
| 507 | }
|
|---|
| 508 | }
|
|---|
| 509 | }
|
|---|
| 510 | @partition_keys = $self->sort_metadata_values_array(keys(%partition_buckets));
|
|---|
| 511 |
|
|---|
| 512 | # Add partitions, and divide big bucket into several
|
|---|
| 513 | my $last_partition_end = "";
|
|---|
| 514 | my $partition_start = "";
|
|---|
| 515 | foreach my $partition (@partition_keys) {
|
|---|
| 516 | my @metadata_values = $self->sort_metadata_values_array(@{$partition_buckets{$partition}->{'metadata_values'}});
|
|---|
| 517 | my $items_in_partition = $partition_buckets{$partition}->{'size'};
|
|---|
| 518 | $partition_start = $self->generate_partition_start($metadata_values[0], $last_partition_end, $self->{"partition_name_length"});
|
|---|
| 519 |
|
|---|
| 520 | if ($items_in_partition > $partition_size_within_level) {
|
|---|
| 521 | my $items_done = 0;
|
|---|
| 522 | my %metadata_values_to_OIDs_subhashes = ();
|
|---|
| 523 | for (my $i = 0; $i < scalar(@metadata_values); $i++) {
|
|---|
| 524 | my $metadata_value = $metadata_values[$i];
|
|---|
| 525 | # If the bookshelf_type is "never", count the documents, otherwise count the distinct metadata values
|
|---|
| 526 | my $items_for_this_md_value = $bookshelf_type eq "never" ? scalar(@{$metadata_value_to_OIDs_hash{$metadata_value}}) : 1;
|
|---|
| 527 |
|
|---|
| 528 | my $partitionend = $self->generate_partition_end($metadata_value, $partition_start, $self->{"partition_name_length"});
|
|---|
| 529 | my $partitionname = $partition_start;
|
|---|
| 530 | if ($partitionend ne $partition_start) {
|
|---|
| 531 | $partitionname = $partitionname . "-" . $partitionend;
|
|---|
| 532 | }
|
|---|
| 533 |
|
|---|
| 534 | # Start a new partition
|
|---|
| 535 | if ($items_done + $items_for_this_md_value > $partition_size_within_level && $items_done != 0) {
|
|---|
| 536 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $partitionname, \%metadata_values_to_OIDs_subhashes);
|
|---|
| 537 | $last_partition_end = $partitionend;
|
|---|
| 538 | $partition_start = $self->generate_partition_start($metadata_value, $last_partition_end, $self->{"partition_name_length"});
|
|---|
| 539 | $items_done = 0;
|
|---|
| 540 | %metadata_values_to_OIDs_subhashes = ();
|
|---|
| 541 | }
|
|---|
| 542 |
|
|---|
| 543 | # If bookshelf_type is "never" and the current metadata value holds too many items, need to split into several partitions
|
|---|
| 544 | if ($bookshelf_type eq "never" && $items_for_this_md_value > $partition_size_within_level) {
|
|---|
| 545 | my $partitionname_for_this_value = $self->generate_partition_start($metadata_value, $last_partition_end, $self->{"partition_name_length"});
|
|---|
| 546 | # Get the number of partitions needed for this value
|
|---|
| 547 | my $num_splits = int($items_for_this_md_value / $partition_size_within_level);
|
|---|
| 548 | $num_splits++ if ($items_for_this_md_value / $partition_size_within_level > $num_splits);
|
|---|
| 549 |
|
|---|
| 550 | my @OIDs_for_this_value = @{$metadata_value_to_OIDs_hash{$metadata_value}};
|
|---|
| 551 | for (my $i = 0; $i < $num_splits; $i++) {
|
|---|
| 552 | my %OIDs_subhashes_for_this_value = ();
|
|---|
| 553 | my @OIDs_for_this_partition = ();
|
|---|
| 554 | 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++) {
|
|---|
| 555 | push (@OIDs_for_this_partition, $OIDs_for_this_value[$d]);
|
|---|
| 556 | }
|
|---|
| 557 |
|
|---|
| 558 | # The last bucket might have only a few items and need to be merged with buckets for subsequent metadata values
|
|---|
| 559 | if ($i == $num_splits - 1 && scalar(@OIDs_for_this_partition) < $partition_size_within_level) {
|
|---|
| 560 | $metadata_values_to_OIDs_subhashes{$metadata_value} = \@OIDs_for_this_partition;
|
|---|
| 561 | $items_done += scalar(@OIDs_for_this_partition);
|
|---|
| 562 | next;
|
|---|
| 563 | }
|
|---|
| 564 |
|
|---|
| 565 | # Add an HList for this bucket
|
|---|
| 566 | $OIDs_subhashes_for_this_value{$metadata_value} = \@OIDs_for_this_partition;
|
|---|
| 567 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $partitionname_for_this_value, \%OIDs_subhashes_for_this_value);
|
|---|
| 568 | $last_partition_end = $partitionname_for_this_value;
|
|---|
| 569 | }
|
|---|
| 570 | next;
|
|---|
| 571 | }
|
|---|
| 572 |
|
|---|
| 573 | $metadata_values_to_OIDs_subhashes{$metadata_value} = $metadata_value_to_OIDs_hash{$metadata_value};
|
|---|
| 574 | $items_done += $bookshelf_type eq "never" ? scalar(@{$metadata_values_to_OIDs_subhashes{$metadata_value}}) : 1;
|
|---|
| 575 |
|
|---|
| 576 | # The last partition
|
|---|
| 577 | if($i == scalar(@metadata_values) - 1) {
|
|---|
| 578 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $partitionname, \%metadata_values_to_OIDs_subhashes);
|
|---|
| 579 | }
|
|---|
| 580 | }
|
|---|
| 581 | }
|
|---|
| 582 | else {
|
|---|
| 583 | # The easier case, just add a partition
|
|---|
| 584 | my %metadata_values_to_OIDs_subhashes = ();
|
|---|
| 585 | for (my $i = 0; $i < scalar(@metadata_values); $i++) {
|
|---|
| 586 | my $metadata_value = $metadata_values[$i];
|
|---|
| 587 | $metadata_values_to_OIDs_subhashes{$metadata_value} = $metadata_value_to_OIDs_hash{$metadata_value};
|
|---|
| 588 | }
|
|---|
| 589 | my $last_metadata_value = $metadata_values[scalar(@metadata_values)-1];
|
|---|
| 590 | my $partitionend = $self->generate_partition_end($last_metadata_value, $partition_start, $self->{"partition_name_length"});
|
|---|
| 591 | my $partitionname = $partition_start;
|
|---|
| 592 | if ($partitionend ne $partition_start) {
|
|---|
| 593 | $partitionname = $partitionname . "-" . $partitionend;
|
|---|
| 594 | }
|
|---|
| 595 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $partitionname, \%metadata_values_to_OIDs_subhashes);
|
|---|
| 596 | $last_partition_end = $partitionend;
|
|---|
| 597 | }
|
|---|
| 598 | }
|
|---|
| 599 | }
|
|---|
| 600 | else {
|
|---|
| 601 | # Generate hlists of a certain size
|
|---|
| 602 | my $partition_size_within_level = $self->{$metadata_group . ".partition_size_within_level"};
|
|---|
| 603 | if ($partition_type_within_level =~ /^constant_size$/i && scalar(keys %metadata_value_to_OIDs_hash) > $partition_size_within_level) {
|
|---|
| 604 | my @sortedmetadata_values = $self->sort_metadata_values_array(keys(%metadata_value_to_OIDs_hash));
|
|---|
| 605 | my $itemsdone = 0;
|
|---|
| 606 | my %metadata_value_to_OIDs_subhash = ();
|
|---|
| 607 | my $lastpartitionend = "";
|
|---|
| 608 | my $partitionstart;
|
|---|
| 609 | foreach my $metadata_value (@sortedmetadata_values) {
|
|---|
| 610 | $metadata_value_to_OIDs_subhash{$metadata_value} = $metadata_value_to_OIDs_hash{$metadata_value};
|
|---|
| 611 | $itemsdone++;
|
|---|
| 612 | my $itemsinpartition = scalar(keys %metadata_value_to_OIDs_subhash);
|
|---|
| 613 |
|
|---|
| 614 | # Is this the start of a new partition?
|
|---|
| 615 | if ($itemsinpartition == 1) {
|
|---|
| 616 | $partitionstart = $self->generate_partition_start($metadata_value, $lastpartitionend, $self->{"partition_name_length"});
|
|---|
| 617 | }
|
|---|
| 618 |
|
|---|
| 619 | # Is this the end of the partition?
|
|---|
| 620 | if ($itemsinpartition == $partition_size_within_level || $itemsdone == @sortedmetadata_values) {
|
|---|
| 621 | my $partitionend = $self->generate_partition_end($metadata_value, $partitionstart, $self->{"partition_name_length"});
|
|---|
| 622 | my $partitionname = $partitionstart;
|
|---|
| 623 | if ($partitionend ne $partitionstart) {
|
|---|
| 624 | $partitionname = $partitionname . "-" . $partitionend;
|
|---|
| 625 | }
|
|---|
| 626 |
|
|---|
| 627 | $self->add_hlist_partition(\@metadata_groups, $classifier_node, $partitionname, \%metadata_value_to_OIDs_subhash);
|
|---|
| 628 | %metadata_value_to_OIDs_subhash = ();
|
|---|
| 629 | $lastpartitionend = $partitionend;
|
|---|
| 630 | }
|
|---|
| 631 | }
|
|---|
| 632 |
|
|---|
| 633 | # The partitions are stored in an HList
|
|---|
| 634 | $classifier_node->{'childtype'} = "HList";
|
|---|
| 635 | }
|
|---|
| 636 |
|
|---|
| 637 | # Otherwise just add all the values to a VList
|
|---|
| 638 | else {
|
|---|
| 639 | $self->add_vlist(\@metadata_groups, $classifier_node, \%metadata_value_to_OIDs_hash);
|
|---|
| 640 | }
|
|---|
| 641 | }
|
|---|
| 642 | }
|
|---|
| 643 |
|
|---|
| 644 |
|
|---|
| 645 | sub convert_utf8_string_to_unicode_string
|
|---|
| 646 | {
|
|---|
| 647 | my $self = shift(@_);
|
|---|
| 648 | my $utf8_string = shift(@_);
|
|---|
| 649 |
|
|---|
| 650 | my $unicode_string = "";
|
|---|
| 651 | foreach my $unicode_value (@{&unicode::utf82unicode($utf8_string)}) {
|
|---|
| 652 | $unicode_string .= chr($unicode_value);
|
|---|
| 653 | }
|
|---|
| 654 | return $unicode_string;
|
|---|
| 655 | }
|
|---|
| 656 |
|
|---|
| 657 |
|
|---|
| 658 | sub convert_unicode_string_to_utf8_string
|
|---|
| 659 | {
|
|---|
| 660 | my $self = shift(@_);
|
|---|
| 661 | my $unicode_string = shift(@_);
|
|---|
| 662 |
|
|---|
| 663 | my @unicode_array;
|
|---|
| 664 | for (my $i = 0; $i < length($unicode_string); $i++) {
|
|---|
| 665 | push(@unicode_array, ord(substr($unicode_string, $i, 1)));
|
|---|
| 666 | }
|
|---|
| 667 | return &unicode::unicode2utf8(\@unicode_array);
|
|---|
| 668 | }
|
|---|
| 669 |
|
|---|
| 670 |
|
|---|
| 671 | sub generate_partition_start
|
|---|
| 672 | {
|
|---|
| 673 | my $self = shift(@_);
|
|---|
| 674 | my $metadata_value = shift(@_);
|
|---|
| 675 | my $lastpartitionend = shift(@_);
|
|---|
| 676 | my $partition_name_length = shift(@_);
|
|---|
| 677 |
|
|---|
| 678 | if ($partition_name_length) {
|
|---|
| 679 | return substr($metadata_value, 0, $partition_name_length);
|
|---|
| 680 | }
|
|---|
| 681 |
|
|---|
| 682 | my $partitionstart = substr($metadata_value, 0, 1);
|
|---|
| 683 | if ($partitionstart le $lastpartitionend) {
|
|---|
| 684 | $partitionstart = substr($metadata_value, 0, 2);
|
|---|
| 685 | # Give up after three characters
|
|---|
| 686 | if ($partitionstart le $lastpartitionend) {
|
|---|
| 687 | $partitionstart = substr($metadata_value, 0, 3);
|
|---|
| 688 | }
|
|---|
| 689 | }
|
|---|
| 690 |
|
|---|
| 691 | return $partitionstart;
|
|---|
| 692 | }
|
|---|
| 693 |
|
|---|
| 694 |
|
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| 695 | sub generate_partition_end
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| 696 | {
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| 697 | my $self = shift(@_);
|
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| 698 | my $metadata_value = shift(@_);
|
|---|
| 699 | my $partitionstart = shift(@_);
|
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| 700 | my $partition_name_length = shift(@_);
|
|---|
| 701 |
|
|---|
| 702 | if ($partition_name_length) {
|
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| 703 | return substr($metadata_value, 0, $partition_name_length);
|
|---|
| 704 | }
|
|---|
| 705 |
|
|---|
| 706 | my $partitionend = substr($metadata_value, 0, length($partitionstart));
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|---|
| 707 | if ($partitionend gt $partitionstart) {
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|---|
| 708 | $partitionend = substr($metadata_value, 0, 1);
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| 709 | if ($partitionend le $partitionstart) {
|
|---|
| 710 | $partitionend = substr($metadata_value, 0, 2);
|
|---|
| 711 | # Give up after three characters
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|---|
| 712 | if ($partitionend le $partitionstart) {
|
|---|
| 713 | $partitionend = substr($metadata_value, 0, 3);
|
|---|
| 714 | }
|
|---|
| 715 | }
|
|---|
| 716 | }
|
|---|
| 717 |
|
|---|
| 718 | return $partitionend;
|
|---|
| 719 | }
|
|---|
| 720 |
|
|---|
| 721 |
|
|---|
| 722 | sub add_hlist_partition
|
|---|
| 723 | {
|
|---|
| 724 | my $self = shift(@_);
|
|---|
| 725 | my @metadata_groups = @{shift(@_)};
|
|---|
| 726 | my $classifier_node = shift(@_);
|
|---|
| 727 | my $partitionname = shift(@_);
|
|---|
| 728 | my $metadata_value_to_OIDs_hash_ref = shift(@_);
|
|---|
| 729 |
|
|---|
| 730 | # Create an hlist partition
|
|---|
| 731 | my %child_classifier_node = ( 'Title' => $self->convert_unicode_string_to_utf8_string($partitionname),
|
|---|
| 732 | 'childtype' => "VList",
|
|---|
| 733 | 'contains' => [] );
|
|---|
| 734 |
|
|---|
| 735 | # Add the children to the hlist partition
|
|---|
| 736 | $self->add_vlist(\@metadata_groups, \%child_classifier_node, $metadata_value_to_OIDs_hash_ref);
|
|---|
| 737 | push(@{$classifier_node->{'contains'}}, \%child_classifier_node);
|
|---|
| 738 | }
|
|---|
| 739 |
|
|---|
| 740 |
|
|---|
| 741 | sub add_vlist
|
|---|
| 742 | {
|
|---|
| 743 | my $self = shift(@_);
|
|---|
| 744 | my @metadata_groups = @{shift(@_)};
|
|---|
| 745 | my $classifier_node = shift(@_);
|
|---|
| 746 | my $metadata_value_to_OIDs_hash_ref = shift(@_);
|
|---|
| 747 |
|
|---|
| 748 | my $metadata_group = shift(@metadata_groups);
|
|---|
| 749 | $classifier_node->{'mdtype'} = $metadata_group;
|
|---|
| 750 |
|
|---|
| 751 | # Create an entry in the vlist for each value
|
|---|
| 752 | foreach my $metadata_value ($self->sort_metadata_values_array(keys(%{$metadata_value_to_OIDs_hash_ref})))
|
|---|
| 753 | {
|
|---|
| 754 | my @OIDs = @{$metadata_value_to_OIDs_hash_ref->{$metadata_value}};
|
|---|
| 755 |
|
|---|
| 756 | # If there is only one item and 'bookshelf_type' is not always (ie. never or duplicate_only), add the item to the list
|
|---|
| 757 | if (@OIDs == 1 && $self->{$metadata_group . ".bookshelf_type"} ne "always") {
|
|---|
| 758 | my $OID = $OIDs[0];
|
|---|
| 759 |
|
|---|
| 760 | # Find the offset of this metadata value
|
|---|
| 761 | my $offset = 0;
|
|---|
| 762 | my $OID_to_metadata_values_hash_ref = $self->{$metadata_group . ".list"};
|
|---|
| 763 | my @metadata_values = @{$OID_to_metadata_values_hash_ref->{$OID}};
|
|---|
| 764 | for (my $i = 0; $i < scalar(@metadata_values); $i++) {
|
|---|
| 765 | if ($metadata_value eq $metadata_values[$i]) {
|
|---|
| 766 | $offset = $i;
|
|---|
| 767 | last;
|
|---|
| 768 | }
|
|---|
| 769 | }
|
|---|
| 770 | push(@{$classifier_node->{'contains'}}, { 'OID' => $OID, 'offset' => $offset });
|
|---|
| 771 | }
|
|---|
| 772 | # If 'bookshelf_type' is 'never', list all the items even if there are duplicated values
|
|---|
| 773 | elsif ($self->{$metadata_group . ".bookshelf_type"} eq "never") {
|
|---|
| 774 | $self->add_sorted_leaf_items(\@OIDs, $classifier_node);
|
|---|
| 775 | }
|
|---|
| 776 | # Otherwise create a sublist (bookshelf) for the metadata value
|
|---|
| 777 | else {
|
|---|
| 778 | my %child_classifier_node = ( 'Title' => $self->convert_unicode_string_to_utf8_string($metadata_value),
|
|---|
| 779 | 'childtype' => "VList",
|
|---|
| 780 | 'contains' => [] );
|
|---|
| 781 |
|
|---|
| 782 | # If there are metadata elements remaining, recursively apply the process
|
|---|
| 783 | if (@metadata_groups > 0) {
|
|---|
| 784 | my $next_metadata_group = $metadata_groups[0];
|
|---|
| 785 | $child_classifier_node{'childtype'} = $self->{$next_metadata_group . ".list_type"};
|
|---|
| 786 | $self->add_level(\@metadata_groups, \@OIDs, \%child_classifier_node);
|
|---|
| 787 | }
|
|---|
| 788 | # Otherwise just add the documents as children of this list
|
|---|
| 789 | else {
|
|---|
| 790 | $self->add_sorted_leaf_items(\@OIDs, \%child_classifier_node);
|
|---|
| 791 | }
|
|---|
| 792 |
|
|---|
| 793 | # Add the sublist to the list
|
|---|
| 794 | push(@{$classifier_node->{'contains'}}, \%child_classifier_node);
|
|---|
| 795 | }
|
|---|
| 796 | }
|
|---|
| 797 | }
|
|---|
| 798 |
|
|---|
| 799 | sub add_sorted_leaf_items
|
|---|
| 800 | {
|
|---|
| 801 | my $self = shift(@_);
|
|---|
| 802 | my @OIDs = @{shift(@_)};
|
|---|
| 803 | my $classifier_node = shift(@_);
|
|---|
| 804 |
|
|---|
| 805 | # Sort leaf nodes and add to list
|
|---|
| 806 | my @sort_leaf_nodes_usingmetadata_groups = @{$self->{'sort_leaf_nodes_using_metadata_groups'}};
|
|---|
| 807 | foreach my $sort_leaf_nodes_usingmetaelem (reverse @sort_leaf_nodes_usingmetadata_groups) {
|
|---|
| 808 | my $OID_to_metadata_values_hash_ref = $self->{$sort_leaf_nodes_usingmetaelem . ".list"};
|
|---|
| 809 | # Force a stable sort (Perl 5.6's sort isn't stable)
|
|---|
| 810 | # !! The [0] bits aren't ideal (multiple metadata values) !!
|
|---|
| 811 | @OIDs = @OIDs[ sort { $OID_to_metadata_values_hash_ref->{$OIDs[$a]}[0] cmp $OID_to_metadata_values_hash_ref->{$OIDs[$b]}[0] || $a <=> $b; } 0..$#OIDs ];
|
|---|
| 812 | }
|
|---|
| 813 |
|
|---|
| 814 | foreach my $OID (@OIDs) {
|
|---|
| 815 | push(@{$classifier_node->{'contains'}}, { 'OID' => $OID });
|
|---|
| 816 | }
|
|---|
| 817 | }
|
|---|
| 818 |
|
|---|
| 819 |
|
|---|
| 820 | sub sort_metadata_values_array
|
|---|
| 821 | {
|
|---|
| 822 | my $self = shift(@_);
|
|---|
| 823 | my @metadata_values = @_;
|
|---|
| 824 |
|
|---|
| 825 | if ($self->{'unicode_collator'}) {
|
|---|
| 826 | return $self->{'unicode_collator'}->sort(@metadata_values);
|
|---|
| 827 | }
|
|---|
| 828 | else {
|
|---|
| 829 | return sort(@metadata_values);
|
|---|
| 830 | }
|
|---|
| 831 | }
|
|---|
| 832 |
|
|---|
| 833 |
|
|---|
| 834 | 1;
|
|---|
