Default CharacterEncodingFilter not ordered correctly

[odrotbohm]

As of 1.2.0 Boot ships with a default CharacterEncodingFilter registered by HttpEncodingAutoConfiguration. The bean definition for that is annotated with @Order(Ordered.HIGHEST_PRECEDENCE) but unfortunately this declaration never gets evaluated as the component triggering the sorting only acts on the bean instance (see ServletContextInitializerBeans.addAsRegistrationBean(…) for the relevant code section).

This causes issues with the HiddenHttpMethodFilter. If this one is registered first, it already accesses the request parameters before the encoding is enforced by the CharacterEncodingFilter and the request data is already in the wrong format.

Generally speaking, I don't think @Order(…) annotations are supported on bean definitions as the BeanDefinition API doesn't allow configuring an order programatically.

I think a workaround would be to create a custom sub-class that additionally implements Ordered and returns Ordered.HIGHEST_PRECEDENCE for the calls to getOrder().