flatten operator in Dataweave in Mule

flatten operator in Dataweave in Mule

If you have an array of arrays, flatten operator can flatten it into a single simple array.







Dataweave code:


%dw 1.0
%output application/json
---
flatten payload


URL: http://localhost:8081/flatten


Input:

[
[1,2,3],[3,4,5]

]


Output:

[

  1,

  2,

  3,

  3,

  4,

  5

]

XML project code:


<?xml version="1.0" encoding="UTF-8"?>

<mule xmlns:dw="http://www.mulesoft.org/schema/mule/ee/dw" xmlns:http="http://www.mulesoft.org/schema/mule/http" xmlns="http://www.mulesoft.org/schema/mule/core" xmlns:doc="http://www.mulesoft.org/schema/mule/documentation"
xmlns:spring="http://www.springframework.org/schema/beans" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-current.xsd
http://www.mulesoft.org/schema/mule/core http://www.mulesoft.org/schema/mule/core/current/mule.xsd
http://www.mulesoft.org/schema/mule/http http://www.mulesoft.org/schema/mule/http/current/mule-http.xsd
http://www.mulesoft.org/schema/mule/ee/dw http://www.mulesoft.org/schema/mule/ee/dw/current/dw.xsd">
<http:listener-config name="HTTP_Listener_Configuration" host="0.0.0.0" port="8081" doc:name="HTTP Listener Configuration"/>
<flow name="test_flattenFlow">
<http:listener config-ref="HTTP_Listener_Configuration" path="/flatten" doc:name="HTTP"/>
<dw:transform-message doc:name="Transform Message">
<dw:set-payload><![CDATA[%dw 1.0
%output application/json
---
flatten payload]]></dw:set-payload>
</dw:transform-message>
</flow>
</mule>