Function issue using if else and try catch

Question

I need a dataweave function which extract fix string to convert it into ISO Date String format

fun convertToISO(dateString: String): String =
    if (dateString == null) 
        "" 
    else 
        try 
            ((dateString[6 to -3] as Number) as DateTime {unit: "milliseconds"} as String)
        catch (e) 
            "WRONG FORMAT"

but I also get error says , does anyone have idea how to solve this problem?

Invalid input '"', expected ? (line 8, column 13):


8|             "WRONG FORMAT"
               ^
Location:
main (line: 8, column:13)

aled · Accepted Answer · 2024-12-03 11:42:48Z

1

You seem to be trying to use Java try-catch syntax however DataWeave is a different language and doesn't have that syntax.

As an alternative you could use the try() and orElse() functions from the Runtime module.

%dw 2.0
output application/json
import try, orElse from dw::Runtime

fun convertToISO(dateString: String): String =
        try ( () ->
                ((dateString[6 to -3] as Number) as DateTime {unit: "milliseconds"} as String))
        orElse
            "WRONG FORMAT"
---
convertToISO("123")

Output:

"WRONG FORMAT"

edited Dec 3, 2024 at 11:42

answered Dec 3, 2024 at 11:36

aled

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