How to dynamically load an XML fragment in XML view? - sapui5

Question

Suppose I have the following XML view:
<mvc:View xmlns:mvc="sap.ui.core.mvc" ...>
<Page>
<content>
<l:VerticalLayout>
<l:content>
<core:Fragment fragmentName="my.static.Fragment" type="XML" />
</l:content>
</l:VerticalLayout>
</content>
</Page>
</mvc:View>
The fragment my.Fragment is statically loaded. However, I now want to dynamically change the to-be-loaded fragment (ideally using data binding the fragmentName property, but any other means should be ok as well), ie. something like this:
<mvc:View xmlns:core="sap.ui.core.mvc" ...>
<Page>
<content>
<l:VerticalLayout>
<l:content>
<core:Fragment fragmentName="{/myDynamicFragment}" type="XML" />
</l:content>
</l:VerticalLayout>
</content>
</Page>
</mvc:View>
However, the latter does not work, and the Fragment definitions don't allow for data binding... I might have missed something, but how should I dynamically change the Fragment in my XML view based on a parameter/model property/etc?
For now, I have resorted to a custom control instead of directly using a fragment in my view, and have that control do the dispatching to the appropriate Fragment, but I feel there should be an easier, out-of-the-box way...

Answer 1

I think the only solution will be initialization of fragment from onInit method of controller:
sap.ui.controller("my.controller", {
onInit : function(){
var oLayout = this.getView().byId('mainLayout'), //don't forget to set id for a VerticalLayout
oFragment = sap.ui.xmlfragment(this.fragmentName.bind(this));
oLayout.addContent(oFragment);
},
fragmentName : function(){
return "my.fragment";
}
});

Answer 2

The fragment name can also result from a binding, including an expression binding which evaluates to a constant. As formatter functions return strings, and not booleans, === 'true' has been added in the following example:
Example: Dynamic Fragment Name
<core:Fragment fragmentName="{= ${path: 'facet>Target', formatter: 'sap.ui.model.odata.AnnotationHelper.isMultiple'} === 'true'
? 'sap.ui.core.sample.ViewTemplate.scenario.TableFacet'
: 'sap.ui.core.sample.ViewTemplate.scenario.FormFacet' }" type="XML"/>