Support for method validation

It's not different than method validation. It is already supported via constructor specific validation methods. Of course the interception mechanism is left to the interception technology.

How is the expert group addressing the issue of constructor validation? Prolly best to leave as an extension, but it'd be nice to have the methods defined, just as they are for method validation. Apache BVal already offers support, and it works nicely along with AspectJ before-construction advice.

yep I was thinking recommendation.

I guess the validation interceptor should be executed as late as possible. I'm just wondering whether this is something which we should define in BV. Wouldn't BV not only provide the API/meta model for method validation, while it's up to integrators how/when to invoke it? In that case we might just add some sort of recommendation related to that aspect to the spec.

We need to think about when a parameter validation interceptor ought to be executed in the interceptor stack

Before or after transaction, security? Some interceptors can change param values.

It's likely that transaction and security must go first. What about others?