This document describes using DataWeave in Mule ESB to transform XML input into a Java object. It includes an XML input file, Mule flow configuration with a DataWeave transform, and a User Java class. The DataWeave transform defines the User object type, extracts the name and lastName fields from the XML payload, and maps them to the firstName and lastName properties of the User object.

1. Mule ESB: DataWeave
xml input to Java Object example

2. This tutorial explains how to develop a
DataWeave transformation from XML to Java
Object.
Pre-requisite:
• Anypoint Studio 5.2.0
• Mule ESB Runtime 3.7.1
• xml input files.
Input XML File
<user>
<name>Annie</name>
<lastName>Point</lastName>
</user>

3. Mule Flow

4. Mule Source
<http:listener-config name="HTTP_Listener_Configuration" host="0.0.0.0" port="8081"
doc:name="HTTP Listener Configuration"/>
<flow name="testweaveFlow">
<http:listener config-ref="HTTP_Listener_Configuration" path="/"
metadata:id="cab0526f-779e-427c-9a33-be44f9b12696" doc:name="HTTP"/>
<dw:transform-message doc:name="Transform Message">
<dw:input-payload doc:sample="json.json"/>
<dw:set-payload><![CDATA[%dw 1.0
%type user = :object { class: "testweave.User" }
%output application/java
---
{
firstName: payload.user.name,
lastName: payload.user.lastName
} as :user]]></dw:set-payload>
</dw:transform-message>
<byte-array-to-string-transformer doc:name="Byte Array to String"/>
</flow>

5. In the transform code I created the Object type in the
header
“ %type user = :object { class: "testweave.User"} ”
And the payload of the transform is converted to User
Object using the transform logic as below.
{
firstName: payload.user.name,
lastName: payload.user.lastName
} as :user

6. DataWeave

7. User.java
package testweave;
public class User {
private String firstName;
private String lastName;
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
@Override
public String toString() {
// TODO Auto-generated method stub
return this.firstName+" "+this.lastName;
}
}