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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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use sweetrdf\InMemoryStoreSqlite\Log\Logger; |
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use sweetrdf\InMemoryStoreSqlite\NamespaceHelper; |
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use sweetrdf\InMemoryStoreSqlite\Store\InMemoryStoreSqlite; |
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abstract class QueryHandler |
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{ |
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protected Logger $logger; |
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protected InMemoryStoreSqlite $store; |
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protected array $term_id_cache; |
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protected string $xsd = NamespaceHelper::NAMESPACE_XSD; |
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public function __construct(InMemoryStoreSqlite $store, Logger $logger) |
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{ |
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$this->logger = $logger; |
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$this->store = $store; |
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} |
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public function getStore(): InMemoryStoreSqlite |
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{ |
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return $this->store; |
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} |
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public function getTermID($val, $term = '') |
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{ |
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/* mem cache */ |
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if (!isset($this->term_id_cache) || (\count(array_keys($this->term_id_cache)) > 100)) { |
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$this->term_id_cache = []; |
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} |
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if (!isset($this->term_id_cache[$term])) { |
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$this->term_id_cache[$term] = []; |
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} |
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$tbl = preg_match('/^(s|o)$/', $term) ? $term.'2val' : 'id2val'; |
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/* cached? */ |
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if ((\strlen($val) < 100) && isset($this->term_id_cache[$term][$val])) { |
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return $this->term_id_cache[$term][$val]; |
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} |
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$r = 0; |
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/* via hash */ |
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if (preg_match('/^(s2val|o2val)$/', $tbl)) { |
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$rows = $this->store->getDBObject()->fetchList( |
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'SELECT id, val FROM '.$tbl.' WHERE val_hash = ? ORDER BY id', |
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[$this->getValueHash($val)] |
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); |
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if (\is_array($rows) && 0 < \count($rows)) { |
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foreach ($rows as $row) { |
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if ($row['val'] == $val) { |
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$r = $row['id']; |
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break; |
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} |
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} |
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} |
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} else { |
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/* exact match */ |
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$sql = 'SELECT id FROM '.$tbl.' WHERE val = ? LIMIT 1'; |
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$row = $this->store->getDBObject()->fetchRow($sql, [$val]); |
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if (null !== $row && isset($row['id'])) { |
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$r = $row['id']; |
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} |
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} |
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if ($r && (\strlen($val) < 100)) { |
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$this->term_id_cache[$term][$val] = $r; |
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} |
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return $r; |
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} |
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public function getValueHash(int | float | string $val): int | float |
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{ |
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return abs(crc32($val)); |
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} |
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} |
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sweetrdf /
in-memory-store-sqlite
