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1 | <?php |
2 | |
3 | /** |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU General Public License |
6 | * as published by the Free Software Foundation; under version 2 |
7 | * of the License (non-upgradable). |
8 | * |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | * GNU General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write to the Free Software |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
17 | * |
18 | * Copyright (c) 2014-2021 (original work) Open Assessment Technologies SA; |
19 | */ |
20 | |
21 | namespace oat\tao\model\search\index; |
22 | |
23 | use oat\generis\model\GenerisRdf; |
24 | use oat\generis\model\OntologyRdfs; |
25 | use oat\tao\model\search\tokenizer\PropertyValueTokenizer; |
26 | use oat\tao\model\search\tokenizer\ResourceClasses; |
27 | |
28 | class OntologyIndex extends \core_kernel_classes_Resource |
29 | { |
30 | public const RDF_TYPE = 'http://www.tao.lu/Ontologies/TAO.rdf#Index'; |
31 | public const PROPERTY_INDEX = 'http://www.tao.lu/Ontologies/TAO.rdf#PropertyIndex'; |
32 | public const PROPERTY_INDEX_FUZZY_MATCHING = 'http://www.tao.lu/Ontologies/TAO.rdf#IndexFuzzyMatching'; |
33 | public const PROPERTY_INDEX_IDENTIFIER = 'http://www.tao.lu/Ontologies/TAO.rdf#IndexIdentifier'; |
34 | public const PROPERTY_INDEX_TOKENIZER = 'http://www.tao.lu/Ontologies/TAO.rdf#IndexTokenizer'; |
35 | public const PROPERTY_DEFAULT_SEARCH = 'http://www.tao.lu/Ontologies/TAO.rdf#IndexDefaultSearch'; |
36 | private const INDEX_CLASS = 'class'; |
37 | |
38 | private $cached = null; |
39 | |
40 | /** |
41 | * Preload all the index properties and return the |
42 | * property requested |
43 | * |
44 | * @param string $propertyUri |
45 | * @return Ambigous <NULL, mixed> |
46 | */ |
47 | private function getOneCached($propertyUri) |
48 | { |
49 | if (is_null($this->cached)) { |
50 | $props = [ |
51 | static::PROPERTY_INDEX_IDENTIFIER, |
52 | static::PROPERTY_INDEX_TOKENIZER, |
53 | static::PROPERTY_INDEX_FUZZY_MATCHING, |
54 | static::PROPERTY_DEFAULT_SEARCH |
55 | ]; |
56 | $this->cached = $this->getPropertiesValues($props); |
57 | } |
58 | return empty($this->cached[$propertyUri]) ? null : reset($this->cached[$propertyUri]); |
59 | } |
60 | |
61 | public function getIdentifier() |
62 | { |
63 | return (string)$this->getOneCached(static::PROPERTY_INDEX_IDENTIFIER); |
64 | } |
65 | |
66 | /** |
67 | * @throws \common_exception_Error |
68 | * @return PropertyValueTokenizer |
69 | */ |
70 | public function getTokenizer() |
71 | { |
72 | if ($this->getIdentifier() === self::INDEX_CLASS) { |
73 | return new ResourceClasses(); |
74 | } |
75 | |
76 | $tokenizer = $this->getOneCached(static::PROPERTY_INDEX_TOKENIZER); |
77 | $implClass = (string) $tokenizer->getUniquePropertyValue( |
78 | $this->getProperty("http://www.tao.lu/Ontologies/TAO.rdf#TokenizerClass") |
79 | ); |
80 | if (!class_exists($implClass)) { |
81 | throw new \common_exception_Error( |
82 | 'Tokenizer class "' . $implClass . '" not found for ' . $tokenizer->getUri() |
83 | ); |
84 | } |
85 | return new $implClass(); |
86 | } |
87 | |
88 | /** |
89 | * Should the string matching be fuzzy |
90 | * defaults to false if no information present |
91 | * |
92 | * @return boolean |
93 | */ |
94 | public function isFuzzyMatching() |
95 | { |
96 | $res = $this->getOneCached(static::PROPERTY_INDEX_FUZZY_MATCHING); |
97 | return !is_null($res) && is_object($res) && $res->getUri() == GenerisRdf::GENERIS_TRUE; |
98 | } |
99 | |
100 | /** |
101 | * Should the property be used by default if no index key is specified |
102 | * defaults to false if no information present |
103 | * |
104 | * @return boolean |
105 | */ |
106 | public function isDefaultSearchable() |
107 | { |
108 | $res = $this->getOneCached(static::PROPERTY_DEFAULT_SEARCH); |
109 | return !is_null($res) && is_object($res) && $res->getUri() == GenerisRdf::GENERIS_TRUE; |
110 | } |
111 | |
112 | |
113 | /** |
114 | * Should the value be stored |
115 | * |
116 | * @return boolean |
117 | */ |
118 | public function isStored() |
119 | { |
120 | return $this->getUri() === OntologyRdfs::RDFS_LABEL; |
121 | } |
122 | } |