Default BindHandler in programmatically created Binder

[bsideup]

I am trying to use the Binder API programmatically ( context ).

The current usage looks more or less like this:

// Create a binder
var binder = Binder.get(environment);

// Some time later
var bindHandler = new ValidationBindHandler(
    new SpringValidatorAdapter(validator)
);
var bindable = Bindable.of(GRpcServerProperties.class);
var serverProperties = binder.bindOrCreate("grpc", bindable, bindHandler);

It would be helpful to be able to set the default BindHandler, so that the actual bind invocation is cleaner:

var bindHandler = new ValidationBindHandler(
    new SpringValidatorAdapter(validator)
);
// Create a binder that validates by default
var binder = Binder.get(environment, bindHandler);

// Some time later
var serverProperties = binder.bindOrCreate("grpc", GRpcServerProperties.class);

[philwebb]

This seems sensible to me. I think we didn't really consider such niceties before because we didn't anticipate that many people would use the Binder directly.