Settinc control hints values in entity object attributes generically

Question

Hi, how are you? I work for a project , that uses JDeveloper 10.1.3.3 version and I am assigned to solve some problems in the part that is associated with ADF Business Components—Model—of the application. The question is how could I implement generic functionality in CustomEntityImpl and there I am to assign some control hint values to some attributes and then the entities that will extend this class will acquire this functionality in their attributes.
I send you some code I have in my mind in order to find out how to write something relevant to set control hints. I have searched in relevant api’s for AttributeHints and EntityDef but I did not find a solution to my problem. I’ve tried this code:
private final String desc = "Description";
protected boolean findAttribute(String name) {
String[] list = this.getAttributeNames();
for (int i = 0; i < list.length; i++) {                       
if (name.equals(list))
return true;
return false;
public void beforeCommit(TransactionEvent transactionEvent) {             
if (findAttribute(desc)){                                                                   
* AttributeDefImpl adi=null;
adi.setProperty(AttributeHints.ATTRIBUTE_DISPLAY_HINT_HIDE,"Hide");
AttributeDef desc=(AttributeDef)adi.getProperty(AttributeHints.ATTRIBUTE_DISPLAY_HINT_HIDE);
super.beforeCommit(transactionEvent);
but it does not work. How could I set this value – to hide one attribute whenever it exists in my entities , setting it once in my CustomEntityImpl class?
I’ve read the whole tutorial ADF Business Components For Forms 4GL Developers but I did not find a solution to my problem. Your help would be a gift to me. Thank you very much!
* I think that the error is here because this object can not be null. In an api I found the following :
Advanced users can provide their own implementation of EntityDefImpl (by subclassing EntityDefImpl). Within it, they can create their own AttributeDefImpls by using: new AttributeDefImpl(...);
How should I subclass EntityDefImpl to create an AttributeDefImpl object?

Answer 1

Hi
why don't you create a mehod on the ApplicationModule and call it from the managed bean (using ADF bindings) to pass ths values in ? Note that a managed bean that has a scope of session doesn't mean that it sits in the session to be shared with ADF BC
Frank