mapLeafValues

mapLeafValues(value: Any, callback: (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.

Introduced in DataWeave version 2.2.2.

Parameters

Name Description

Name	Description
`value`	The value to map.
`callback`	The mapper function.

value

The value to map.

callback

The mapper function.

Example

This example transforms all the string values to upper case.

Source

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

Output

{
   "user": [
     {
       "name": "MARIANO",
       "lastName": "ACHAVAL"
     }
   ],
   "group": "DATA-WEAVE"
 }Json

Example

This example returns a new value for an object, array, or attribute.

Source

%dw 2.0
output application/json
import * from dw::util::Tree
---
{
    name: "Mariano",
    test: [1,2,3]
} mapLeafValues ((value, path) -> if(isObjectType(path))
                                        "***"
                                  else if(isArrayType(path))
                                        "In an array"
                                  else "Is an attribute")DataWeave

Output

{
  "name": "***",
  "test": [
    "In an array",
    "In an array",
    "In an array"
  ]
}Json