95 lines
3.5 KiB
PHP
95 lines
3.5 KiB
PHP
<?php
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/**
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; under version 2
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* of the License (non-upgradable).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright (c) 2017 (original work) Open Assessment Technologies SA (under the project TAO-PRODUCT);
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*
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*/
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namespace oat\taoQtiItem\model\qti\metadata\ontology;
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use oat\generis\model\OntologyAwareTrait;
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use oat\generis\model\OntologyRdf;
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use oat\generis\model\OntologyRdfs;
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use oat\taoQtiItem\model\qti\metadata\imsManifest\classificationMetadata\ClassificationEntryMetadataValue;
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use oat\taoQtiItem\model\qti\metadata\imsManifest\classificationMetadata\ClassificationMetadataValue;
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use oat\taoQtiItem\model\qti\metadata\imsManifest\classificationMetadata\ClassificationSourceMetadataValue;
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use oat\taoQtiItem\model\qti\metadata\MetadataExtractionException;
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use oat\taoQtiItem\model\qti\metadata\MetadataExtractor;
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use taoItems_models_classes_ItemsService;
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use taoTests_models_classes_TestsService;
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class GenericLomOntologyClassificationExtractor implements MetadataExtractor
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{
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use OntologyAwareTrait;
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static $excludedProperties = [
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OntologyRdf::RDF_TYPE,
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taoItems_models_classes_ItemsService::PROPERTY_ITEM_CONTENT,
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taoItems_models_classes_ItemsService::PROPERTY_ITEM_MODEL,
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taoTests_models_classes_TestsService::PROPERTY_TEST_TESTMODEL,
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taoTests_models_classes_TestsService::PROPERTY_TEST_CONTENT,
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];
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/**
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* Extract resource metadata and transform it to ClassificationMetadataValue
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*
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* @param \core_kernel_classes_Resource $resource
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*
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* @return array
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*
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* @throws MetadataExtractionException
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* @throws \oat\tao\model\metadata\exception\writer\MetadataWriterException
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*/
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public function extract($resource)
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{
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if (! $resource instanceof \core_kernel_classes_Resource) {
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throw new MetadataExtractionException(__('The given target is not an instance of core_kernel_classes_Resource'));
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}
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$identifier = \tao_helpers_Uri::getUniqueId($resource->getUri());
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$metadata = [$identifier => []];
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$triples = $resource->getRdfTriples();
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/** @var \core_kernel_classes_Triple $triple */
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foreach ($triples->getIterator() as $triple) {
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/** @var \core_kernel_classes_Resource $property */
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$property = $this->getResource($triple->predicate);
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$value = $triple->object;
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if (
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trim($value) != ''
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&& $property->isProperty()
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&& !in_array($property->getUri(), self::$excludedProperties)
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) {
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$metadata[$identifier][] = new ClassificationMetadataValue(
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new ClassificationSourceMetadataValue($resource->getUri(), $property->getUri()),
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[new ClassificationEntryMetadataValue($resource->getUri(), $value)]
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);
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}
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}
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if (empty($metadata[$identifier])) {
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return [];
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}
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return $metadata;
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}
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}
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