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Date: Fri, 28 Dec 2007 14:32:40 -0500
From: "Lupu Slobodu" <lupu.slobodu@gmail.com>
To: "Jakarta Commons Users List" <user@commons.apache.org>
Subject: Re: SCXML
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sure, so the information is available just at runtime, no way to determine
it before calling engine.go(), right?

On Dec 28, 2007 2:12 PM, Rahul Akolkar <rahul.akolkar@gmail.com> wrote:

> On 12/28/07, Lupu Slobodu <lupu.slobodu@gmail.com> wrote:
> > Is there a chance to know at the parsing time what state is a (custom)
> > action going to run in? This could be useful if one wants to initialize
> and
> > validate an action handler registry that would associate action handlers
> to
> > particular states.
> >
> <snip/>
>
> Without going to the architectural necessity for such introspection
> (it may be good to do without it, if possible), the state in which a
> custom action is being executed at run-time is the parent of the
> Executable container in which it resides i.e. given ...
>
>  <state id="foo">
>      <onentry>
>          <my:bar .../>
>      </onentry>
>  </state>
>
> where <my:bar> is implemented by a custom action whose execute()
> method contains (untested):
>
>  String id = getParent().getParent().getId();
>
> then the value of id for the execution above would be "foo".
>
> -Rahul
>
>
> > While it is possible to determine the current sate at run time and
> > dynamically instantiate the handlers( as the AbstractStateMachine does),
> > this approach  leaves room for potential inconsistencies (as a handler
> class
> > could not be defined)
> >
>
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