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<?php
namespace SMW;
use RuntimeException;
use SMW\Exception\StoreNotFoundException;
use Onoi\MessageReporter\NullMessageReporter;
use Psr\Log\NullLogger;
/**
* Factory method that returns an instance of the default store, or an
* alternative store instance.
*
* @license GNU GPL v2+
* @since 1.9
*
* @author mwjames
*/
class StoreFactory {
/**
* @var array
*/
private static $instance = [];
/**
* @since 1.9
*
* @param string|null $class
*
* @return Store
* @throws RuntimeException
* @throws StoreNotFoundException
*/
public static function getStore( $class = null ) {
if ( $class === null ) {
$class = $GLOBALS['smwgDefaultStore'];
}
if ( !isset( self::$instance[$class] ) ) {
self::$instance[$class] = self::newFromClass( $class );
}
return self::$instance[$class];
}
/**
* @since 1.9
*/
public static function clear() {
self::$instance = [];
}
private static function newFromClass( $class ) {
if ( !class_exists( $class ) ) {
throw new RuntimeException( "{$class} was not found!" );
}
$instance = new $class;
if ( !( $instance instanceof Store ) ) {
throw new StoreNotFoundException( "{$class} cannot be used as a store instance!" );
}
$instance->setMessageReporter( new NullMessageReporter() );
$instance->setLogger( new NullLogger() );
return $instance;
}
}
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