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| 1 | <?php |
| 2 | |
| 3 | namespace Flow\Data\Index; |
| 4 | |
| 5 | use Flow\Exception\DataModelException; |
| 6 | |
| 7 | /** |
| 8 | * Offers direct lookup of an object via a unique feature(set of properties) |
| 9 | * on the object. |
| 10 | */ |
| 11 | class UniqueFeatureIndex extends FeatureIndex { |
| 12 | |
| 13 | public function getLimit() { |
| 14 | return 1; |
| 15 | } |
| 16 | |
| 17 | public function queryOptions() { |
| 18 | return [ 'LIMIT' => $this->getLimit() ]; |
| 19 | } |
| 20 | |
| 21 | public function limitIndexSize( array $values ) { |
| 22 | if ( count( $values ) > $this->getLimit() ) { |
| 23 | throw new DataModelException( 'Unique index should never have more than ' . $this->getLimit() . ' value', 'process-data' ); |
| 24 | } |
| 25 | return $values; |
| 26 | } |
| 27 | |
| 28 | protected function removeFromIndex( array $indexed, array $row ) { |
| 29 | $this->cache->delete( $this->cacheKey( $indexed ) ); |
| 30 | } |
| 31 | } |