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.

mapLeafValues(Any, (value: Any, path: Path) -> Any): Any

Maps the terminal (leaf) nodes in the tree.

Leafs nodes cannot have an object or an array as a value.


Name Description


The value to map.


The mapper function.


This example transforms all the string values to upper case.


%dw 2.0
output application/json
import * from dw::util::Tree
    user: [{
        name: "mariano",
        lastName: "achaval"
    group: "data-weave"
} mapLeafValues (value, path) -> upper(value)


   "user": [
       "name": "MARIANO",
       "lastName": "ACHAVAL"
   "group": "DATA-WEAVE"

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