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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\Geo\GlobeMath; |
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use DataValues\Geo\Values\GlobeCoordinateValue; |
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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 0.3 |
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* |
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* @licence GNU GPL v2+ |
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* @author Thiemo Kreuz |
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*/ |
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class GlobeCoordinateHandler extends DataValueHandler { |
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/** |
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* @var GlobeMath |
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*/ |
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private $math; |
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public function __construct() { |
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$this->math = new GlobeMath(); |
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} |
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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 'globecoordinate'; |
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} |
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/** |
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* @see DataValueHandler::completeTable |
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* |
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* @param Table $table |
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*/ |
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protected function completeTable( Table $table ) { |
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$table->addColumn( 'value_globe', Type::STRING, array( 'length' => 255, 'notnull' => false ) ); |
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$table->addColumn( 'value_lat', Type::FLOAT ); |
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$table->addColumn( 'value_lon', Type::FLOAT ); |
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$table->addColumn( 'value_min_lat', Type::FLOAT ); |
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$table->addColumn( 'value_max_lat', Type::FLOAT ); |
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$table->addColumn( 'value_min_lon', Type::FLOAT ); |
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$table->addColumn( 'value_max_lon', Type::FLOAT ); |
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$table->addColumn( 'hash', Type::STRING, array( 'length' => 32 ) ); |
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// TODO: We still need to find out if combined indexes are better or not. |
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$table->addIndex( array( 'value_lon', 'value_lat' ) ); |
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$table->addIndex( array( 'value_min_lat', 'value_max_lat', 'value_min_lon', 'value_max_lon' ) ); |
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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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// Order by West-East first |
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return array( 'value_lon', 'value_lat' ); |
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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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* @return array |
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* @throws InvalidArgumentException |
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*/ |
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public function getInsertValues( DataValue $value ) { |
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if ( !( $value instanceof GlobeCoordinateValue ) ) { |
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throw new InvalidArgumentException( 'Value is not a GlobeCoordinateValue.' ); |
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} |
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$normalized = $this->math->normalizeGlobeCoordinate( $value ); |
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$lat = $normalized->getLatitude(); |
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$lon = $normalized->getLongitude(); |
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$precision = abs( $value->getPrecision() ); |
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$values = array( |
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'value_globe' => $this->normalizeGlobe( $value->getGlobe() ), |
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'value_lat' => $lat, |
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'value_lon' => $lon, |
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'value_min_lat' => $lat - $precision, |
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'value_max_lat' => $lat + $precision, |
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'value_min_lon' => $lon - $precision, |
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'value_max_lon' => $lon + $precision, |
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// No special human-readable hash needed, everything required is in the other fields. |
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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 GlobeCoordinateValue ) ) { |
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throw new InvalidArgumentException( 'Value is not a GlobeCoordinateValue.' ); |
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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 GlobeCoordinateValue $value |
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*/ |
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private function addInRangeConditions( QueryBuilder $builder, GlobeCoordinateValue $value ) { |
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$value = $this->math->normalizeGlobeCoordinate( $value ); |
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$globe = $this->normalizeGlobe( $value->getGlobe() ); |
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$lat = $value->getLatitude(); |
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$lon = $value->getLongitude(); |
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$epsilon = abs( $value->getPrecision() ); |
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if ( $globe === null ) { |
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$builder->andWhere( 'value_globe IS NULL' ); |
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} else { |
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$builder->andWhere( 'value_globe = :globe' ); |
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$builder->setParameter( ':globe', $globe ); |
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} |
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$builder->andWhere( 'value_lat >= :min_lat' ); |
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$builder->andWhere( 'value_lat <= :max_lat' ); |
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$builder->andWhere( 'value_lon >= :min_lon' ); |
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$builder->andWhere( 'value_lon <= :max_lon' ); |
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$builder->setParameter( ':min_lat', $lat - $epsilon ); |
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$builder->setParameter( ':max_lat', $lat + $epsilon ); |
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$builder->setParameter( ':min_lon', $lon - $epsilon ); |
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$builder->setParameter( ':max_lon', $lon + $epsilon ); |
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} |
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/** |
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* @param string $globe |
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* |
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* @return string|null |
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*/ |
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private function normalizeGlobe( $globe ) { |
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$globe = $this->math->normalizeGlobe( $globe ); |
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if ( $globe === GlobeCoordinateValue::GLOBE_EARTH ) { |
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$globe = null; |
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} |
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return $globe; |
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} |
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} |
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wmde /
WikibaseQueryEngine
