Parse Dates with DataWeave

These DataWeave examples define a function (fun) in the DataWeave header to normalize date separators (/, ., and -) within different date formats so that all of them use the same separator (-). Before you begin, note that DataWeave version 2 (%dw 2.0) is for Mule 4 apps. For a Mule 3 app, refer to DataWeave version 1 (%dw 1.0) examples, within the Mule 3.9 documentation set. For other Mule versions, you can use the Mule Runtime version selector in the table of contents.

The examples use these functions:

replace so that all dates match a single pattern.
mapObject to run through the the date elements. The script applies the normalizing function to each date.
as (in the second DataWeave script) to change the data type of the values to a Date type with a specific date format.

Example: Returns Dates as String Types

DataWeave Script:

%dw 2.0
output application/xml
fun normalize(date) = (date) replace "/" with "-" replace "." with "-"
---
dates: (payload.dates mapObject {
    normalized_as_string: normalize($)
})

Input XML Payload:

<dates>
  <date>26-JUL-16</date>
  <date>27/JUL/16</date>
  <date>28.JUL.16</date>
</dates>

Output XML:

<?xml version='1.0' encoding='US-ASCII'?>
<dates>
  <normalized_as_string>26-JUL-16</normalized_as_string>
  <normalized_as_string>27-JUL-16</normalized_as_string>
  <normalized_as_string>28-JUL-16</normalized_as_string>
</dates>

Example: Returns Dates as Date Types