Read zipped base64 file and convert to xml

Hello Experts,

I have a client requirement :

1. PI will make a soap call to ariba and receive and xml response .

2. The reponse will have base64 encoded payload.( coming in one field)

3. After decoding i will get a zip file .

4. After unzipping i will get a csv file .

5. Then i need to convert the csv file to xml .

I am trying to write java mapping code to decode base64, unzip the file and then convert the csv to xml.

However the java mapping is returning only the zip file . Can anyone please help here. Your inputs /suggestions would be great.

(PS:Unable to attach my java code)

Thanks in advance.

Anumeha.