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<?php |
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/** |
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* This file is part of the sweetrdf/InMemoryStoreSqlite package and licensed under |
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* the terms of the GPL-2 license. |
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* |
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* (c) Konrad Abicht <[email protected]> |
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* (c) Benjamin Nowack |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace sweetrdf\InMemoryStoreSqlite\Store\QueryHandler; |
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class DescribeQueryHandler extends SelectQueryHandler |
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{ |
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private array $added_triples; |
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private array $described_ids; |
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private array $ids; |
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private array $r; |
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public function runQuery($infos) |
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{ |
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$ids = $infos['query']['result_uris']; |
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if ($vars = $infos['query']['result_vars']) { |
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$sub_r = parent::runQuery($infos); |
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$rf = $infos['result_format'] ?? ''; |
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if (\in_array($rf, ['sql', 'structure', 'index'])) { |
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return $sub_r; |
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} |
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$rows = $sub_r['rows'] ?? []; |
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foreach ($rows as $row) { |
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foreach ($vars as $info) { |
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$val = isset($row[$info['var']]) ? $row[$info['var']] : ''; |
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if ( |
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$val |
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&& ('literal' != $row[$info['var'].' type']) && !\in_array($val, $ids) |
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) { |
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$ids[] = $val; |
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} |
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} |
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} |
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} |
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$this->r = []; |
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$this->described_ids = []; |
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$this->ids = $ids; |
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$this->added_triples = []; |
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$is_sub_describe = 0; |
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while ($this->ids) { |
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$id = $this->ids[0]; |
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$this->described_ids[] = $id; |
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$q = 'CONSTRUCT { <'.$id.'> ?p ?o . } WHERE {<'.$id.'> ?p ?o .}'; |
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$sub_r = $this->store->query($q); |
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$sub_index = \is_array($sub_r['result']) ? $sub_r['result'] : []; |
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$this->mergeSubResults($sub_index, $is_sub_describe); |
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$is_sub_describe = 1; |
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} |
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return $this->r; |
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} |
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private function mergeSubResults($index, $is_sub_describe = 1) |
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{ |
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foreach ($index as $s => $ps) { |
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if (!isset($this->r[$s])) { |
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$this->r[$s] = []; |
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} |
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foreach ($ps as $p => $os) { |
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if (!isset($this->r[$s][$p])) { |
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$this->r[$s][$p] = []; |
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} |
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foreach ($os as $o) { |
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$id = md5($s.' '.$p.' '.serialize($o)); |
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if (!isset($this->added_triples[$id])) { |
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if (1 || !$is_sub_describe) { |
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$this->r[$s][$p][] = $o; |
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if (\is_array($o) && ('bnode' == $o['type']) && !\in_array($o['value'], $this->ids)) { |
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$this->ids[] = $o['value']; |
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} |
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} elseif (!\is_array($o) || ('bnode' != $o['type'])) { |
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$this->r[$s][$p][] = $o; |
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} |
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$this->added_triples[$id] = 1; |
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} |
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} |
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} |
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} |
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/* adjust ids */ |
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$ids = $this->ids; |
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$this->ids = []; |
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foreach ($ids as $id) { |
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if (!\in_array($id, $this->described_ids)) { |
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$this->ids[] = $id; |
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} |
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} |
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} |
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} |
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sweetrdf /
in-memory-store-sqlite
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.