Hi I'm trying to iterate through a list of maps using `<ui:repeat />` within a JSF template that accompanies an interception script. I'm using the `identity.setWorkingParameter()` and `identity.getWorkingParameter()` methods for persisting the collection between steps (with the correct key included in the list returned from the `getExtraParametersForStep` hook). Regardless of whether I define the collection as a Python list of dictionaries, or a Java list of hash maps, I'm unable to recover its value in subsequent steps. It is however available if I retrieve it immediately after setting in the _same_ step, which suggests it could be a serialisation problem between HTTP requests. Backing that theory up somewhat, if I serialise both collections into a JSON string myself manually (using Jackson for the Java and json.dumps for the Python), the values persist into subsequent steps as would be expected. That unfortunately breaks the template though because JSF can't of course iterate through a JSON string. Python approach: ``` identity.setWorkingParameter("items", [ {"title": "foo"}, {"title": "bar"} ]) ``` Java approach: ``` item1 = HashMap() item1.put("title", "foo") item2 = HashMap() item2.put("title", "bar") identity.setWorkingParameter("items", Arrays.asList(item1, item2)) ``` JSF template code: ``` <ui:repeat value="#{identity.getWorkingParameter('items').entrySet().toArray()}" var="item"> <p> <h:outputText value="#{item.title}" /> </p> </ui:repeat> ``` For both approaches I would expect/hope to see two `<p>` paragraphs rendered, but in-fact there is nothing rendered and there are no errors reported (that I can find at least). Similarly if I `print` the value of those parameters in the subsequent step/request I get `None`, except when I've serialised them manually. Is it possible to store complex data structures in the _working parameters_, and if so what do I need to do to ensure that they're persisted across steps/requests? Is trying to use pure Python over Java recommended? Any help is much appreciated. Thanks, Adam