[jira] [Resolved] (SCXML-212) Add support for SCXML datamodel type and default Evaluator instantiation

["Ate Douma (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SCXML-212?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ate Douma resolved SCXML-212.
-----------------------------
    Resolution: Fixed

> Add support for SCXML datamodel type and default Evaluator instantiation 
> -------------------------------------------------------------------------
>
>                 Key: SCXML-212
>                 URL: https://issues.apache.org/jira/browse/SCXML-212
>             Project: Commons SCXML
>          Issue Type: Improvement
>    Affects Versions: 2.0
>            Reporter: Ate Douma
>            Assignee: Ate Douma
>             Fix For: 2.0
>
>
> The SCXML specification allows for defining the required datamodel (type) on the root SCXML element.
> This datamodel type defines which language support the SCXML document requires.
> For Commons SCXML this means: what Evaluator type should be instantiated and configured on the SCXMLExecutor.
> I'll introduce a new singleton EvaluatorFactory holding new EvaluatorProvider instances for each currently supported Evaluator language: Jexl, Groovy, JS (ecmascript) and XPath, with the JexlEvaluatorProvider used as default.
> The current requirement of having to instantiate and provide a specific Evaluator instance on the SCXMLExecutor then no longer is needed: an SCXML document now can define the datamodel attribute instead (or accept the JexlEvaluator as fallback). 
> It still is possible to use and configure a custom/dedicated Evaluator programmatically as before to override the new default handling.
> The only new restriction is that an explicitly configured Evaluator must support the datamodel type defined on the SCXML document. 



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