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DataWeave 2.2 is compatible and bundled with Mule 4.2. This version of Mule reached its End of Life on May 2, 2023, when Extended Support ended.

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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