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From "Rahul Akolkar" <rahul.akol...@gmail.com>
Subject [dialog] Styling the dialog-config to SCXML
Date Fri, 25 Aug 2006 17:45:59 GMT
As step 0 of SHALE-263 [1], here [2] is an initial cut of the
stylesheet for producing the needed SCXML documents from Shale dialog
configuration files. That directory [2] also contains the result of
styling the dialog-config.xml that comes with the Shale usecases
application (log on / edit profile).

Probably easiest to try via the command line:

%java org.apache.xalan.xslt.Process -IN dialog-config.xml -XSL
dialogconfig2scxml.xsl -OUT scxml-config.xml

Caveats:

 * To produce multiple output documents, we either need processor
specific XSLT extensions (if on XSLT 1.0, which pretty much all of us
are) or we need a XSLT 2.0 processor. I'm currently using a
xalan-specific extension (xalan:write), so the above will only work on
JDK 1.4 (or 1.5 with xalan on classpath -- only if Sun 1.5). Will
explore better solutions, wanted to get the initial cut of the
stylesheet out there.

 * Quick sketch, may not be bullet proof yet (if you can try it out on
your dialog-configs that'd be great).

Notes about style results:

 * The event name "faces.outcome" and the variable name "outcome" are
arbitrarily chosen (its the job of the SCXML NavigationHandler to
trigger the event, we can choose whatever names we like)

 * The SCXML <invoke> element in view states can go away. It has to do
with the state-activity separation in state charts. There are multiple
ways to achieve this (some do not involve adding to the XML vocabulary
-- similar to the ViewResolvers used in Spring MVC -- thats more of a
C/C approach). I'm not proposing that new applications use <invoke>.

-Rahul

[1] https://issues.apache.org/struts/browse/SHALE-263
[2] http://people.apache.org/~rahul/shale/style-dialogs/

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