EJB and ADF- Checking State of Entity Bean before Commit

Question

Hi All,
I have created a sample using Ejb as business service and then created 2 forms in page and i am calling only one merge action for 2 forms.
I need to validate whether the data is modified or not....in business service layer...
So my doubt is how to check the State whether it is modified or not... or how can i use EntityFacadeImpl class..Any link or suggestions??
I am using Jdev 11.1.1.5
Regards
Karthick

Answer 1

Hi,
+.. or how can i use EntityFacadeImpl class+
expose a method onthe facade (e.g. checkDirtyState) that accesses this class for the transaction state and that returns true or false. This then is exposed by the DataControl and you create a method binding in teh pages PageDef for it. You can then access it as
BindingContainer bindings = ... get access to the binding layer ...
OperationBinding checkDirtyDataState = (OperationBinding) bindings.get("Name of Method Binding");
Object outcome = checkDirtyDataState.execute();
if(outcome != null){
   if ((Boolean)outcome == Boolean.TRUE){
      //do this
  else{
    //do that
}A Second option is to add a transient field to the entities that indicates client side changes. You then iterate over the DCIteratorBinding reference checking if any entity in it has been changed (identified by the dirty flag)
Frank