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<?php |
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namespace Maps; |
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use MWException; |
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/** |
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* Class for interaction with MappingService objects. |
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* |
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* @since 0.6.6 |
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* |
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* @licence GNU GPL v2+ |
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* @author Jeroen De Dauw < [email protected] > |
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*/ |
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final class MappingServices { |
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/** |
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* Associative array containing service identifiers as keys and the names |
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* of service classes as values. |
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* |
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* @var string[] |
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*/ |
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private static $registeredServices = []; |
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/** |
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* Associative with service identifiers as keys containing instances of |
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* the mapping service classes. |
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* |
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* Note: This list only contains the instances, so is not to be used for |
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* looping over all available services, as not all of them are guaranteed |
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* to have an instance already, use $registeredServices for this purpose. |
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* |
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* @var MappingService[] |
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*/ |
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private static $services = []; |
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/** |
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* Registers a service class linked to an identifier. |
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*/ |
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public static function registerService( string $serviceIdentifier, string $serviceClassName ) { |
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self::$registeredServices[$serviceIdentifier] = $serviceClassName; |
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} |
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/** |
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* Returns the instance of a service class. This method takes |
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* care of creating the instance if this is not done yet. |
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* |
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* @throws MWException |
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*/ |
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public static function getServiceInstance( string $serviceIdentifier ): MappingService { |
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if ( !array_key_exists( $serviceIdentifier, self::$services ) ) { |
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if ( array_key_exists( $serviceIdentifier, self::$registeredServices ) ) { |
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$service = new self::$registeredServices[$serviceIdentifier]( $serviceIdentifier ); |
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if ( $service instanceof MappingService ) { |
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self::$services[$serviceIdentifier] = $service; |
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} else { |
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throw new MWException( |
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'The service object linked to service identifier ' . $serviceIdentifier . ' does not implement iMappingService.' |
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); |
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} |
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} else { |
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throw new MWException( |
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'There is no service object linked to service identifier ' . $serviceIdentifier . '.' |
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); |
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} |
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} |
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return self::$services[$serviceIdentifier]; |
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} |
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public static function getMainServiceName( string $serviceName ): string { |
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if ( !array_key_exists( $serviceName, self::$services ) ) { |
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foreach ( array_keys( self::$registeredServices ) as $serviceIdentifier ) { |
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$service = self::getServiceInstance( $serviceIdentifier ); |
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if ( $service->hasAlias( $serviceName ) ) { |
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return $service->getName(); |
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} |
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} |
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} |
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return $serviceName; |
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} |
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} |
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JeroenDeDauw /
Maps
