I have some code that i want to try and emulate generics for. I know there are no generics in Apex but is there something we can do instead?
Let me explain
(String) sfBorr.get('SSN__pc');
sfBorr is an sObject
This line of code will throw an exception if get() returns null. I want to create a method that will catch this error and then just return null if the field is blank but i need to cast the object at some point, which means i would need to check for null every time i assign a field.
Well, there is a solution.
we have getPopulatedFieldsAsMap method in Sobject
getPopulatedFieldsAsMap Returns a map of populated field names and their corresponding values. The map contains only the fields that have been populated in memory for the SObject instance.
You can use it to your advantage.
(String) sfBorr.getPopulatedFieldsAsMap().get('SSN__pc');
This won't give you Invalid Field Exception. Happy Days
String id = (String) new Account().getPopulatedFieldsAsMap().get('Issd'); it works
Commented
Feb 21, 2019 at 19:23
(String) sfBorr.get('SSN__pc');will actually not throw an exception but still returnnull, assumingsfBorris aMap.SObject, and as long as the field exists on theSObject, if the value doesn't return anything, the casting here won't throw an exception.