[jboss-as7-dev] Expressions (Detyped API document feedback)

[David M. Lloyd]

On 01/05/2011 08:54 AM, Brian Stansberry wrote:
> On 1/5/11 8:17 AM, David M. Lloyd wrote:
>>> 2) If there is significant benefit, how can we model this using the
>>> simpler type system?
>>
>> Easy - I can add a PROPERTY_EXPRESSION type which attempts to resolve
>> the expression when you call asString()/asInt()/etc. (toString() would
>> return the expression).
>>
>
> This would need to be done on the server side and the calculated result
> shipped to the client.

I'm not sure this is really necessary.  I'd think we'd have runtime 
operations available to query the actual values in use for these kinds 
of things; I think for regular model queries the user would want to read 
back the expressions only.

Or maybe the read operation request parameters could contain a flag to 
resolve expressions?

I suspect that we'd want to take active steps to prevent the user from 
resolving a node in the wrong place though.  Maybe an explicit 
.resolve() method which copies the current node with all values 
resolved?  That way the user won't be bitten by a doing .asString() and 
suddenly getting a different value than is on the server.
-- 
- DML