Is it possible to add a JSFF to a page programmatically without Task Flows?

Question

My use case is this: My application does not use task flows. If a value returned from the database is 0, I am creating a UIComponent and adding it to a PanelGroup on a page. If the value returned is 1, I need a way to programatically add a JSFF to the page. So, that means I cannot define the JSFF on the page with a <jsp:include... />.
The closest solution I have found so far is to use af:declarativeComponent, but when attempting to create this component via the ADF Faces API, I find that there is a method for getViewId, but not for setViewId, meaning I cannot add the JSFF to the declarativeComponent and in turn add the DC to the PanelGroup.
Thanks.

Answer 1

Frank,
I stand corrected on utilizing a Task Flow. After some learning on my end, Task Flows and Regions appear to be a solution for my requirement.
I created a dynamic task flow (jsff), dropped it on the jspx page to create a region and it executed successfully.
Now that I know drag and drop works for this task flow, I am attempting to add the region to the page at runtime. Here is the code I am using:
private void ProcessEmailUpdateFragment(String id, FlexContent fc) {
RichRegion rr = new RichRegion();
// this is the tag created via drag and drop: <af:region value="#{bindings.dynamicRegion1.regionModel}" id="r1"/>
FacesContext facesContext = FacesContext.getCurrentInstance();
ExpressionFactory elFactory = facesContext.getApplication().getExpressionFactory();
ELContext elContext = facesContext.getELContext();
ValueExpression valueExp = elFactory.createValueExpression(elContext, "#{bindings.taskflowdefinition1.regionModel}", Object.class);
RegionModel model = (RegionModel)valueExp.getValue(elContext);
rr.setRegionModel(model);
rr.setId("r" + id);
rr.setValue(model);
FlexUIContainer.add(rr);
}Here is the error I am receiving:
<UIXRegion> <getRegionModel>
java.lang.IllegalStateException: The "value" attribute on a region component with id "r0" was null or not specified thus its RegionModel is null. Now using an empty RegionModel instead.
     at oracle.adf.view.rich.component.fragment.UIXRegion.getRegionModel(UIXRegion.java:455)
     at oracle.adf.view.rich.component.fragment.UIXRegion._beginInterruptibleRegion(UIXRegion.java:682)
     at oracle.adf.view.rich.component.fragment.UIXRegion.encodeBegin(UIXRegion.java:279)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:928)I do not see any references to this error anywhere online and was hoping you could provide a bit of guidance. Initially, I only was setting the RichRegion Id and RegionModel, then when I received the above error, I set the Value, with no change.
Thanks,
MattC
UPDATE: The reason for the error is that the model object is null...looking into it now.
Edited by: MattC on Jan 17, 2012 5:27 PM
UPDATE: Copy/paste error. EL needed to be #{bindings.dynamicRegion1.regionModel}, not #{bindings.taskflowdefinition1.regionModel} (copied from example). Now I have encountered an additional error, which I believe may reveal I have reached a dead end:
<PropertyKey> <saveValue> Unserializable value:oracle.adf.controller.internal.binding.DCTaskFlowBinding$InnerTaskFlowRegionModel@3694d537 for key:UINodePropertyKey[value,14]In this post from 3 years back, you wrote that a use case that resulted in this same error was not supported: insert a region programatically
It appears this may still the case. Either way, I was hoping you would provide additional insight.
Thanks.
Edited by: MattC on Jan 17, 2012 5:49 PM
I am running JDev 11.1.1.5
Edited by: MattC on Jan 18, 2012 9:05 AM