BaseRequestItem.getTypedParameter() does not work with parameterized types

For example in AppDataHandler.create() there is code like this:

Map<String, String> values = request.getTypedParameter("data", Map.class);

Obviously there will be no way for the underlying BeanConvertor to know what the parameterized type is.

One way I can see to solve this is to add a new method to the BeanConvertor interface:

public <T> T convertToObject(String json, Type type);

So that in AppDataHandler you can do something like:

Map<String, String> values = request.getTypedParameter("data", new TypeLiteral<Map<String, String>>);

If this is acceptable, I will start working on a patch.