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https://issues.apache.org/jira/browse/SCXML-69?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rahul Akolkar updated SCXML-69:
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Remaining Estimate: (was: 72h)
Original Estimate: (was: 72h)
> JEXL built-in Data() function cannot return a reference to a whole <data>
> element
> ---------------------------------------------------------------------------------
>
> Key: SCXML-69
> URL: https://issues.apache.org/jira/browse/SCXML-69
> Project: Commons SCXML
> Issue Type: Improvement
> Affects Versions: 0.5, 0.6, 0.7
> Reporter: Javier Arauz
> Priority: Minor
>
> There is no way with JEXL of building a Data() expression that refers to a
> whole <data> element, only to one of its children.
> Using standard W3C SCXML it is possible to refer to a whole <data> element,
> e.g.:
> <data name="myFoo"><content>Hi there!</content></data>
> <data name="foo" expr="'bar'"/>
> <assign location="/foo" expr="/myFoo/content"/>
> In theory, after running the above SCXML the 'foo' data element changes from
> value 'bar' to 'Hi there!'.
> There is no equivalent to the above SCXML using JEXL, since no Data()
> expression yields the root <data> element. This has the side effect that data
> elements as 'foo' above are effectively constants, since once defined there's
> no way of changing them.
> The solution to this problem would consist of implementing a new method in
> class org.apache.commons.scxml.Builtin that takes just two arguments: the
> namespaces in use and the name of the <data> element, and returns an
> org.w3c.Node containing whatever that <data> element contains. Then you could
> write:
> <data name="myFoo"><content>Hi there!</content></data>
> <data name="foo" expr="'bar'"/>
> <assign location="Data(foo)" expr="Data(myFoo, 'content'"/>
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