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.

match(String, Regex): Array<String>

Uses a Java regular expression (regex) to match a string and then separates it into capture groups. Returns the results in an array.

Note that you can use match for pattern matching expressions that include case statements.


Name Description


A string.


A Java regex for matching characters in the text.


In this example, the regex matches the input email address and contains two capture groups within parentheses (located before and after the @). The result is an array of elements: The first matching the entire regex, the second matching the initial capture group () in the the regex, the third matching the last capture group ([a-z]).


%dw 2.0
output application/json
"" match(/([a-z]*)@([a-z]*).com/)




This example outputs matches to values in an array that end in 4. It uses flatMap to iterate over and flatten the list.


%dw 2.0
var a = ''
var b = ''
var c = ''
output application/json
[ a, b, c ] flatMap ( $ match(/.*[$4]/) )


[  "", "" ]

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