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Date: Sat, 21 May 2011 18:48:30 -0400
Message-ID: <BANLkTimNrMEXBCro9zZ8f_W78-y2wvxGGQ@mail.gmail.com>
Subject: Re: [scxml] Trigger "complicated" events
From: Rahul Akolkar <rahul.akolkar@gmail.com>
To: Commons Users List <user@commons.apache.org>
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On Sat, May 21, 2011 at 4:41 PM, Artem Vovk <vovk.artem@googlemail.com> wro=
te:
> Hi,
>
> =A0 =A0 =A0 =A0In the document about Authoring Applications for the Multi=
modal Architecture(http://www.w3.org/TR/mmi-auth/), I have noticed an inter=
esting <transition> tag :
>
> =A0 =A0 =A0 =A0<!-- handle GUI input -->
> =A0 =A0<transition event=3D"mmi:extension" cond=3D"_event.data..@source.t=
oString() =3D=3D 'GUI' &&
> =A0 =A0 =A0 =A0 _event.data..@status.toString() =3D=3D 'success'" target=
=3D"echoColor"/>
> =A0 =A0 =A0 <!-- save color to data model -->
> =A0 =A0 =A0 <assign location=3D"_data.color" expr=3D"_event.data..color.t=
oString()"/>
> =A0 =A0</transition>
>
> It looks that a data was send with the event and one can access this data=
 with _event.data... =A0. How can I send such events from commons scxml to =
scxml document?(with method fireEvent(String event) I can fire only the eve=
nt name, without data)
>
<snip/>

When you instantiate the TriggerEvent, use the three argument
constructor to add event payload:

  http://commons.apache.org/scxml/0.9/apidocs/org/apache/commons/scxml/Trig=
gerEvent.html#TriggerEvent(java.lang.String,
int, java.lang.Object)

Then, you may refer to the payload Object as _eventdata (in v0.9, in
next release it will change to _event.data as the spec now requires).

Here is an example from the test suite that uses event payload to
determine transitions to follow; so you can look up syntax (see parent
directory for more samples, syntax depends on EL in use):

  http://svn.apache.org/repos/asf/commons/proper/scxml/trunk/src/test/java/=
org/apache/commons/scxml/env/jexl/eventdata-02.xml

-Rahul


> Cheers,
> Artem

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