Parse Dates with DataWeave

DataWeave 2.2 is compatible and bundled with Mule 4.2. Standard Support for Mule 4.2 ended on May 2, 2021, and this version of Mule will reach its End of Life on May 2, 2023, when Extended Support ends.

Deployments of new applications to CloudHub that use this version of Mule are no longer allowed. Only in-place updates to applications are permitted.

MuleSoft recommends that you upgrade to the latest version of Mule 4 that is in Standard Support so that your applications run with the latest fixes and security enhancements.

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 1.0 (%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

Input
<dates>
  <date>26-JUL-16</date>
  <date>27/JUL/16</date>
  <date>28.JUL.16</date>
</dates>
DataWeave
%dw 2.0
output text/xml
fun normalize(date) date replace "/" with "-" replace "." with "-"
---

dates: (payload.dates mapObject {
    normalized_as_string: normalize($.date)
})
Output (dates are String types)
<?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

Input
<dates>
  <date>26-JUL-16</date>
  <date>27/JUL/16</date>
  <date>28.JUL.16</date>
</dates>
DataWeave
%dw 2.0
output text/xml
fun normalize(date) date replace "/" with "-" replace "." with "-"
---
// Outputs date values as Date types in the specified format
dates: (payload.dates mapObject {
    normalized_as_date: normalize($.date) as Date {format: "d-MMM-yy"}
})
Output (dates are Date types)
<?xml version='1.0' encoding='US-ASCII'?>
<dates>
  <normalized_as_date>2016-07-26</normalized_as_date>
  <normalized_as_date>2016-07-27</normalized_as_date>
  <normalized_as_date>2016-07-28</normalized_as_date>
</dates>

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