[Trinidad] how to detect phases

[Renzo Tomaselli]

Hi, as many others - I'm trying to optimize loading data from my 
business layer, avoiding to do it as much as possible while restoring a 
view.
Now I noticed that components needing a complex data model as their 
value (tree, table, etc.) ask the backing bean for this model exactly 
twice: one while restoring, one while rendering. This is different than 
normal getters which appear to be invoked a variable number of times.
The question is: how safe is to speculate on this behavior to decide 
about current phase, and to arrange (or skip) data loading accordingly ?

-- Renzo