How to pass parameters to individual regions in multitaskflow

Question

I have a page, where the regions are added dynamically (using multiTaskFlow ). All the regions are of the same type( defined by same taskflow definition) and hence each region takes a different values for the same parameter type.
How do we pass different parameter values, when creating TaskFlowBindingAttributes?
Since TaskFlowBindingAttributes takes parametersMap as an EL string, I couldn't figure out , how to define the EL so that each region gets its parameter?
Following are the code snippets:
Java code for that is creating a List<TaskFlowBindingAttributes>
         for(MyRegion region: regionList)
             TaskFlowBindingAttributes tfBindAttr = new TaskFlowBindingAttributes();
             tfBindAttr.setId(region.getId());
             tfBindAttr.setTaskFlowId(new TaskFlowId("/WEB-INF/core/custom_app_task-flow.xml", "custom_app_task-flow"));
             tfBindAttr.setRefreshCondition("ifNeeded");
             tfBindAttr.setParametersMap(""); //??? How to pass params here since this takes EL String.
             list.add(tfBindAttr);
Multitaskflow entry in pageDef file:
<multiTaskFlow id="multiRegion1"
                    taskFlowList="#{viewScope.core_extensibility_cusapp_model.uiAppTemplate.taskFlowBindings}"
xmlns="http://xmlns.oracle.com/adf/controller/binding"/>
Jspx code:
<af:forEach var="tf"
items="#{bindings.multiRegion1.taskFlowBindingList}">
<cust:showDetailFrame shortDesc="#{''}" id="sdf2">
<af:region value="#{tf.regionModel}" id="r1"/>
</cust:showDetailFrame>
</af:forEach>
thanks
maher

Answer 1

Hi,
what if you create a managed bean property as shown below
ManagedBean:
Map<String, ? extends Map<String, Boolean>> parameters = new HashMap<String,HashMap<String,Object>>();
then you create setter/getter for this map. This way you can address the HashMap for each region as
#{scope.managedbean.parameters['nested_hashmap_string']}
Frank