SOAP to Rest convertion with collection of items - rest

Question

I'm developping a mediation flow in WSO2 Integration Studio. The indbound-endpoint is a rest api and the endpoints is a soap web service.
The client ask for a list of medical specialties.
The backend service respond with this list in SOAP response.
Simply converting SOAP response to JSON with a property mediator is not an option since the client wait for a specific JSON format.
I tried the script mediator without any success. Moreover i read that script mediator should be only used as a last chance solution.
What is the best practices to do this type of work? (convert soap to json with data collection in it)
SOAP Response is something like:
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
<s:Body>
<GetSpecialtiesResponse xmlns="http://tempuri.org/">
<GetSpecialtiesResult xmlns:a="http://schemas.datacontract.org/2004/07/WsAgenda.DataContracts" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<a:Specialty>
<a:code>cardiology</a:code>
<a:name>Cardiologie</a:name>
</a:Specialty>
<a:Specialty>
<a:code>neurology</a:code>
<a:name>Neurologie</a:name>
</a:Specialty>
</GetSpecialtiesResult>
</GetSpecialtiesResponse>
</s:Body>
</s:Envelope>
Specific needed REST response format is something like:
{
"specialities": [
{
"id": "cardiology",
"name": "Cardiologie"
},
{
"id": "neurology",
"name": "Neurologie"
}
]
}

Answer 1

You can convert SOAP to JSON using below 2 properties.
<property name="ContentType"
scope="axis2"
type="STRING"
value="application/json"/>
<property name="messageType"
scope="axis2"
type="STRING"
value="application/json"/>
Output
{
"GetSpecialtiesResponse":{
"GetSpecialtiesResult":{
"Specialty":[
{
"code":"cardiology",
"name":"Cardiologie"
},
{
"code":"neurology",
"name":"Neurologie"
}
]
}
}
}