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<?php |
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namespace Wikibase\QueryEngine\SQLStore\DVHandler; |
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use Ask\Language\Description\ValueDescription; |
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use DataValues\DataValue; |
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use DataValues\TimeValue; |
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use DataValues\TimeValueCalculator; |
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use Doctrine\DBAL\Query\QueryBuilder; |
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use Doctrine\DBAL\Schema\Table; |
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use Doctrine\DBAL\Types\Type; |
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use InvalidArgumentException; |
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use Wikibase\QueryEngine\QueryNotSupportedException; |
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use Wikibase\QueryEngine\SQLStore\DataValueHandler; |
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/** |
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* @since 0.1 |
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* |
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* @licence GNU GPL v2+ |
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* @author Adam Shorland < [email protected] > |
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* @author Thiemo Kreuz |
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*/ |
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class TimeHandler extends DataValueHandler { |
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/** |
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* @see DataValueHandler::getBaseTableName |
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* |
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* @return string |
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*/ |
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protected function getBaseTableName() { |
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return 'time'; |
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} |
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/** |
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* @see DataValueHandler::completeTable |
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*/ |
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protected function completeTable( Table $table ) { |
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// TODO: Do we need to store the precision, before, after, timezone and calendar model? |
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$table->addColumn( 'value_timestamp', Type::BIGINT ); |
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$table->addColumn( 'value_min_timestamp', Type::BIGINT ); |
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$table->addColumn( 'value_max_timestamp', Type::BIGINT ); |
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$table->addColumn( 'hash', Type::STRING, array( 'length' => 32 ) ); |
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$table->addIndex( array( 'value_timestamp' ) ); |
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$table->addIndex( array( 'value_min_timestamp' ) ); |
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$table->addIndex( array( 'value_max_timestamp' ) ); |
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} |
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/** |
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* @see DataValueHandler::getSortFieldNames |
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* |
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* @return string[] |
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*/ |
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public function getSortFieldNames() { |
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return array( 'value_timestamp' ); |
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} |
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/** |
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* @see DataValueHandler::getInsertValues |
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* |
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* @param DataValue $value |
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* |
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* @throws InvalidArgumentException |
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* @return array |
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*/ |
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public function getInsertValues( DataValue $value ) { |
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if ( !( $value instanceof TimeValue ) ) { |
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throw new InvalidArgumentException( 'Value is not a TimeValue.' ); |
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} |
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$calculator = new TimeValueCalculator(); |
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$timestamp = $calculator->getTimestamp( $value ); |
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$precisionInSeconds = $calculator->getSecondsForPrecision( $value->getPrecision() ); |
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$before = abs( $value->getBefore() ); |
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// The range from before to after must be at least one unit long |
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$after = max( 1, abs( $value->getAfter() ) ); |
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$values = array( |
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'value_timestamp' => $timestamp, |
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'value_min_timestamp' => $timestamp - $before * $precisionInSeconds, |
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'value_max_timestamp' => $timestamp + $after * $precisionInSeconds, |
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'hash' => $this->getEqualityFieldValue( $value ), |
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); |
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return $values; |
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} |
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/** |
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* @see DataValueHandler::addMatchConditions |
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* |
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* @param QueryBuilder $builder |
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* @param ValueDescription $description |
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* |
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* @throws InvalidArgumentException |
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* @throws QueryNotSupportedException |
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*/ |
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public function addMatchConditions( QueryBuilder $builder, ValueDescription $description ) { |
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$value = $description->getValue(); |
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if ( !( $value instanceof TimeValue ) ) { |
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throw new InvalidArgumentException( 'Value is not a TimeValue.' ); |
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} |
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if ( $description->getComparator() === ValueDescription::COMP_EQUAL ) { |
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$this->addInRangeConditions( $builder, $value ); |
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} else { |
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parent::addMatchConditions( $builder, $description); |
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} |
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} |
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/** |
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* @param QueryBuilder $builder |
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* @param TimeValue $value |
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*/ |
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private function addInRangeConditions( QueryBuilder $builder, TimeValue $value ) { |
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$calculator = new TimeValueCalculator(); |
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$timestamp = $calculator->getTimestamp( $value ); |
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$precisionInSeconds = $calculator->getSecondsForPrecision( $value->getPrecision() ); |
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$before = abs( $value->getBefore() ); |
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// The range from before to after must be at least one unit long |
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$after = max( 1, abs( $value->getAfter() ) ); |
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// When searching for 1900 (precision year) we do not want to find 1901-01-01T00:00:00. |
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$builder->andWhere( 'value_timestamp >= :min_timestamp' ); |
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$builder->andWhere( 'value_timestamp < :max_timestamp' ); |
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$builder->setParameter( ':min_timestamp', $timestamp - $before * $precisionInSeconds ); |
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$builder->setParameter( ':max_timestamp', $timestamp + $after * $precisionInSeconds ); |
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} |
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} |
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wmde /
WikibaseQueryEngine
