DataWeave Support in Flex Gateway Policies

DataWeave is the programming language designed by MuleSoft for data transformation. It enables you to build a simple solution for a common integration developer use case: read and parse data from one format, transform the data, and write it out as a different format.

Flex Gateway supports a subset of DataWeave in policy configuration expressions. DataWeave is only supported in included policies and custom policies created with PDK..

Available Types

Null
Boolean
String
Number (Driven as 64 bits floating points)
Array
Object (Repeated keys are not available)

Available Value Constructors for Types

Unavailable Value Constructors for Types

Null (Writing a null literal is not supported)
Object (Objects can not be defined as literals)

Available Flow Control Structures

if else

Unavailable Flow Control Structures

do

Available Selectors

Array[Number]
Array[String]
Object[String]
String[Number]

Unavailable Selectors

Object[Number]

Available Equality and Relational Operators

Available Logical Operators

Available Default Operators

default

Available Functions

`++`

`contains`

`lower`

`splitBy`

splitBy(String, String): Array<String>

`sizeOf`

`trim`

`upper`

`uuid`

uuid(): String

`dw::core::Strings::substringAfter`

`dw::core::Strings::substringAfterLast`

`dw::core::Strings::substringBefore`

`dw::core::Strings::substringBeforeLast`

Available Predefined Variables

attributes
- attributes.headers
- attributes.method (Only available in request context)
- attributes.queryParams (Only available in request context)
- attributes.queryString (Only available in request context)
- attributes.requestPath (Only available in request context)
- attributes.requestUri (Only available in request context)
- attributes.localAddress (Only available in request context)
- attributes.remoteAddress (Only available in request context)
- attributes.scheme (Only available in request context)
- attributes.version (Only available in request context)
- attributes.statusCode (Only available in response context)
authentication
- authentication.clientId
- authentication.clientName
- authentication.principal
- authentication.properties
payload
- payload
vars
- Individual policies support different sets of variables. For information, refer to the policies listed in Included Policies Directory.