On Mon, May 9, 2011 at 4:19 PM, Dario D <darac1...@gmail.com> wrote:
> Hello,
>
> I am trying to create an ad-hoc array in my workflow and provide it to a
> custom action:
>
> <state id="fetchCustomerData">
> <onentry>
> <log expr="'Customer - Fetching data'"/>
> <al:fetchTableData select="['col1', 'col2']" />
> </onentry>
> </state>
>
> In the custom action, I am evaluating this string through JEXL Evaluator:
>
> public void execute(EventDispatcher eventDispatcher, ErrorReporter
> errorReporter, SCInstance scInstance, Log log, Collection collection) throws
> ModelException, SCXMLExpressionException {
> log.info(scInstance.getEvaluator().eval(scInstance.getRootContext(),
> this.getSelect()));
> }
>
> This throws an error:
>
> WARNING: EXPRESSION_ERROR (eval('['col1', 'col2']'):Encountered "[" at line
> 1, column 1.
> Was expecting one of:
> <EOF>
> <INTEGER_LITERAL> ...
> <FLOAT_LITERAL> ...
> "{" ...
> "empty" ...
> "(" ...
> "size" ...
> "-" ...
> "~" ...
> "!" ...
> "not" ...
> "null" ...
> "true" ...
> "false" ...
> ";" ...
> "if" ...
> "while" ...
> "foreach" ...
> <IDENTIFIER> ...
> <STRING_LITERAL> ...
> ):
>
> Is creating arrays (or HashMaps, for that matter) even possible like this in
> SCXML? I was following the guide at:
> http://commons.apache.org/jexl/reference/syntax.html
>
> The executor was created like this:
>
> SCXMLExecutor exec = null;
> exec = new SCXMLExecutor(new JexlEvaluator(), new
> SimpleDispatcher(), new SimpleErrorReporter());
> Context ctx = new JexlContext();
> exec.setRootContext(ctx);
> exec.setStateMachine(scxml);
> exec.setSuperStep(true);
>
> Thank you!
>
<snip/>
JEXL 2.x syntax will require a suitable Evaluator/Context
implementation (the default in v0.9 supports JEXL 1.x). You can either
provide one yourself or try the one attached to this ticket [1].
-Rahul
[1] https://issues.apache.org/jira/browse/SCXML-114
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