If you need to read a property on a custom control and do something to any component on the page before a page loads, it can get tricky because the compositeData object is not available in the beforeRenderResponse event and getComponent() does not work in the beforePageLoad event.
I have an application where I need to dynamically inject components before a page loads. However, the injection depends on custom properties on a custom control, so it needs to read the properties and then get a handle to a component and modify it. Since the compositeData object isn’t available in the beforeRenderResponse event and getComponent() doesn’t work in the beforePageLoad event, there’s no single place to put the code that I need.
Fortunately, there’s a simple workaround. Code in the beforePageLoad event can read custom properties from the compositeData object and store them in viewScope variables. Then, code in the beforeRenderResponse event can read those values from viewScope and use getComponent() to get the handle to the component that I need to modify.
