public static <T> T instantiateClass(Class<T> clazz) throws BeanInstantiationException {
        Assert.notNull(clazz, "Class must not be null");
        if (clazz.isInterface()) {
            throw new BeanInstantiationException(clazz, "Specified class is an interface");
        } else {
            try {
                return instantiateClass(clazz.getDeclaredConstructor());
            } catch (NoSuchMethodException var3) {
                Constructor<T> ctor = findPrimaryConstructor(clazz);
                if (ctor != null) {
                    return instantiateClass(ctor);
                } else {
                    throw new BeanInstantiationException(clazz, "No default constructor found", var3);
                }
            } catch (LinkageError var4) {
                throw new BeanInstantiationException(clazz, "Unresolvable class definition", var4);
            }
        }
    }

Constructor<T> ctor = findPrimaryConstructor(clazz);
			if (ctor != null) {
				return instantiateClass(ctor);
			}
			throw new BeanInstantiationException(clazz, "No default constructor found", ex);