Hello fellow Developers,
I'm currently working with JDeveloper Version 12.2.1.4.0.
I have a entitybased column “Zuordnung” thats varchar(1)/String that can only have ‘J’/'N' values.
I want that column to be displayed as an SelectBooleanCheckbox in a table on the GUI. The requirement is that i need to display ‘J’ as true, ‘N’ as false and NULL. The Problem is that i cannot differ between false and null in the GUI.
I tried the Property nullValueMeans="mixed" as stated here:
https://docs.oracle.com/middleware/1221/adf/develop-faces/GUID-60791617-6EE6-4A12-ADE2-9870841A1A7E.htm#ADFUI-GUID-061A260A-01B9-4128-BFBA-262EA93A30A7__CHDCDEJE:~:text=Figure%2011%2D24%20selectBooleanCheckbox%20Component%20in%20Mixed%20State
but it does not have any effect on the GUI. Well, atleast not the effect i want to achieve as described in the link.
It switches from this : 
to this:
Thanks in advance!