CForms binding: provide context information to Convertors

[Jochen Kuhnle <li...@kuhnle.net>]

Hi,

I need a converter to convert between Objects and their String IDs. Use 
case is e.g. the mapping between Country IDs and Country Objects. The 
BeanConvertor does not do the trick, since it can only convert to Objects 
it has already seen while converting them to Strings.

Therefor I want to write a new converter that converts using JXPath 
expressions. However, this converter needs context information, e.g. to 
get to lookup tables. Supplying this means adding the widget (where I can 
store attributes) to Convertor.convertTo/FromString signatures.

Since this is an interface change, I thought I'd ask before submitting 
patches...

Regards,
Jochen