DataWeave functions are packaged in modules. Functions in the Core (dw::Core) module are imported automatically into your DataWeave scripts. To use other modules, you need to import the module or functions you want to use by adding the import directive to the head of your DataWeave script, for example:
-
import dw::core::Strings -
import camelize, capitalize from dw::core::Strings -
import * from dw::core::Strings
The way you import a module impacts the way you need to call its functions from a DataWeave script. If the directive does not list specific functions to import or use * from to import all functions from a function module, you need to specify the module when you call the function from your script. For example, this import directive does not identify any functions to import from the String module, so it calls the pluralize function like this: Strings::pluralize("box").
%dw 2.0
import dw::core::Strings
output application/json
---
{ 'plural': Strings::pluralize("box") }The next example identifies a specific function to import from the String module, so it can call the method like this: pluralize("box").
%dw 2.0
import pluralize from dw::core::Strings
output application/json
---
{ 'plural': pluralize("box") }The next example imports all functions from the String module, so it can call the method like this: pluralize("box").
%dw 2.0
import * from dw::core::Strings
output application/json
---
{ 'plural': pluralize("box") }