Accessing unmarshalled entities through interpolation

[lantunes]

Would it be useful to access unmarshalled entities through interpolation?

For example, a usage might be "Hello from [MyEntity.someProperty]", where MyEntity indicates that the request body should be unmarshalled using the MyEntity type, and someProperty reflectively accesses a JavaBean property called "someProperty" on the MyEntity instance. The property should have a return type, and the return value's toString() method will be invoked.

[lantunes]

The type MyEntity in the example above would have to be fully qualified, and given with its package name. So the example would become "Hello from [my.package.MyEntity.someProperty]". Otherwise, how could the type be resolved with just the simple name?

One option might be to provide the type to be interpolated elsewhere, such as a map, and the MyEntity type in the string could be replaced by an alias corresponding to a key in the map. So, the example could be "Hello from [entity.someProperty]", and a map would exist with {"entity" -> MyEntity.class}.

[lantunes]

We'd be better off using different delimiters for the bean properties. For instance, the example could become "Hello from #(entity.someProperty)", where "#(" and ")" are the delimiters.

[lantunes]

We could define aliases for types by registering them with the server:

server.register(MyEntity.class).withAlias("entity");

Then we can access them in the interpolated string: "Hello from #(entity.someProperty)".