CompoundModel based on proxies

[Scott Swank]

One of our more clever developers created a CompoundPropertyModel that
uses a cglib proxy to strongly bind the mutators to the model.  It
looks like this:

                SharedPropertyModel<Customer> model = new
SharedPropertyModel<Customer>(customer);
                this.setModel(model);

                FormComponent firstName = new
CustomerNameField("firstName").setRequired(true);
                model.bind(firstName).to().getFirstName();
                add(firstName);

                FormComponent lastName = new 
CustomerNameField("lastName").setRequired(true);
                model.bind(lastName).to().getLastName();
                add(lastName);

                FormComponent addr1 = new 
AddressField("address1").setRequired(true);
                model.bind(addr1).to().getAddress().getAddress1();
                add(addr1);

                FormComponent addr2 = new AddressField("address2");
                model.bind(addr2).to().getAddress().getAddress2();
                add(addr2);

                FormComponent city = new CityField("city");
                model.bind(city).to().getAddress().getCity();
                add(city);

We're happy to share if folk like this approach.  N.B. that the .to()
call is for readability rather than out of any necessity.

Cheers,
Scott

-- 
Scott Swank
reformed mathematician

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