Re: [Help-jel] question

[Konstantin L. Metlov]

Dear Damien,

> Is there a way to get the list of variables
> referenced/used in an expression?
>
> Using the resolver it could be possible:
> - create an empty list before compiling
> - compiling
>  - in getTypeName calls, add the var to the list
>
> Is it right? Is there a better way?
Yes, this is the right way. I'm not sure if there can be anything really 
better for this task. The method "getTypeName(String name)" of the 
resolver is called for each of recognized identifiers as soon as they are 
recognized by the parser. It is really the best place to collect variable 
names.

One thing to note is that if the variable name contains dots (e.g. looks 
like "name1.name2.name3") the getTypeName() will be called three times 
(with arguments "name1", "name1.name2" and "name1.name2.name3"), which 
reflects the hierarchical (tree-like) structure of DV namespace. In this 
case, the longest sequence for which getTypeName() still returns a 
non-null value is considered to be the DV name, but the variables on the 
preceding level of the hierarchy (e.g. "name1" and "name1.name2" in the 
above example) must also be defined (e.g. (getTypeName("name1") != null) 
and (getTypeName("name1.name2")!=null)).

With the best regards,
                          Konstantin.