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From "Rahul Akolkar (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SCXML-26) Add parameter to Evaluator.newContext
Date Tue, 03 Oct 2006 17:27:20 GMT
    [ http://issues.apache.org/jira/browse/SCXML-26?page=comments#action_12439566 ] 
            
Rahul Akolkar commented on SCXML-26:
------------------------------------

Indeed we're aware that SCXML will be at its productive best when its used in particular contexts,
not in isolation. In terms of the two options from your last comment, #1 (query an SCXMLExecutor
instance for the context corresponding to a target) is feasible, and I think would be a useful
addition. For #2, its true that Evaluators may need more, but the interface provides the bare
minimum (anything else should be part of the implementation).


> Add parameter to Evaluator.newContext
> -------------------------------------
>
>                 Key: SCXML-26
>                 URL: http://issues.apache.org/jira/browse/SCXML-26
>             Project: Commons SCXML
>          Issue Type: Improvement
>    Affects Versions: 0.5
>            Reporter: Hallvard Trætteberg
>             Fix For: 1.0
>
>
> The Evaluator.newContext method currently takes one argument, the parent context. However,
to make it easier for the context to link to relevant application data, it would be nice if
it also took a TransitionTarget argument, i.e. have the signature     public Context newContext(TransitionTarget
target, Context parent); By including the target in the context, it becomes easier for expressions
to refer to contextual data. In my case, SCXML is used together with data bindings, and expressions
are used to refer to data in the context of states and transitions. I had to modify SCXML
as suggested above, to provide the link between state and data bindings.

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