Reading an attribute based on a condition using dataweave 2.0 from JSON - mule

Question

I have a sample json as
{
"Employees": {
"Employee":
{
"EmpID": "JC01",
"TerminationDate": "2021-03-15",
"FirstName" :"XXXX",
"LastName":"aaa"
}
}
}
I would like to find whether "JCO1" employee is left the company or not.For that, I check the TerminationDate field and whether if it is < current date I assume the particular staff left the company.
My dataweave script to find this is;
%dw 2.0
output application/java
---
(vars.pload.Employees.Employee filter(((if ( $.TerminationDate =='' ) '9999-01-01' else $.TerminationDate) as Date) < (now() as Date)) map($ - "TerminationDate")
)
But this fails because my payload is not an array. May i know what will be the right function to use instaed of 'filter' and 'map' here?

Answer 1

One way to do would be to use .. selector to access Employee object:
%dw 2.0
output application/java
---
(payload.Employees..Employee filter(((($.TerminationDate default "9999-01-01") as Date) < (now() as Date))) map($ - "TerminationDate")
)
Another approach could be using filterObject:
%dw 2.0
output application/java
---
(payload.Employees filterObject(!((($.Employee.TerminationDate default "9999-01-01") as Date) < (now() as Date)))
).Employee - "TerminationDate"