oxregistry.php

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<?php

class oxRegistry
{
    protected static $_aInstances = array();

    public static function get( $sClassName )
    {
        $sClassName = strtolower( $sClassName );
        if ( isset( self::$_aInstances[$sClassName] ) ) {
            return self::$_aInstances[$sClassName];
        } else {
            self::$_aInstances[$sClassName] = oxNew( $sClassName );
            return self::$_aInstances[$sClassName];
        }
    }

    public static function set( $sClassName, $oInstance )
    {
        $sClassName = strtolower( $sClassName );

        if ( is_null( $oInstance ) ) {
            unset( self::$_aInstances[$sClassName] );
            return;
        }

        self::$_aInstances[$sClassName] = $oInstance;
    }

    public static function getConfig()
    {
        return self::get( "oxConfig" );
    }

    public static function getSession()
    {
        return self::get( "oxSession" );
    }

    public static function getLang()
    {
        return self::get("oxLang");
    }

    public static function getUtils()
    {
        return self::get("oxUtils");
    }

    public static function getKeys()
    {
        return array_keys( self::$_aInstances );
    }
}