Policy XML to JSON in Azure APIM not converting to proper JSON format - azure-api-management

Question

i am consuming wcf service which returns XML response, in Azure APIM i am transforming those into Json response by using the below APIM policy
<xml-to-json kind="direct" apply="always" consider-accept-header="false" />
It works fine until i get xml response as bleow like contains one title in the titles section,
<TitlesResponse>
<Titles>
<Title>
<Name>BookTitle-1</Name>
<Author>BookTitle-2</Author>
</Title>
<Title>
<Name>BookTitle-1</Name>
<Author>BookTitle-2</Author>
</Title>
</Titles>
<Titles>
<Title>
<Name>BookTitle-1</Name>
</Title>
</Titles>
</TitlesResponse>
The json response for the above xml is as below
{
"TitlesResponse": {
"Titles": [
{
"Title": [
{
"Name": "BookTitle-1",
"Author": "BookTitle-2"
},
{
"Name": "BookTitle-1",
"Author": "BookTitle-2"
}
]
},
{
"Title": {
"Name": "BookTitle-1"
}
}
]
}
}
The client expects always Json array in the Title section but it's returning jsonobject when only one title is there.
I tried this in outbound set-body but not working
string xmlContent = context.Response.Body.As<string>(preserveContent: true);
XmlDocument doc = new XmlDocument();
doc.LoadXml(xmlContent);
return JsonConvert.SerializeObject(doc);
Do we have any other way to convert to expected Json format from xml in the APIM

Answer 1

I'm not sure if there's a real solution to this problem.
It would be great if JsonConvert accepts also an XSD for serialization.
But I created a workaround:
The Request body is transformed from XML to JSON.
If the datatype is JOject, it will be replaced with an JArray:
<inbound>
<base />
<xml-to-json kind="direct" apply="always" consider-accept-header="false" />
<set-body>#{
var body = context.Request.Body.As<JObject>(true);
JArray titles = body["TitlesResponse"]["Titles"] as JArray;
for (int i = 0; i < titles.Count; i++)
{
JToken item = titles[i]["Title"];
if(item.Type == JTokenType.Object && item.Type != JTokenType.Array )
{
JObject clone = (JObject)item.DeepClone();
titles[i]["Title"] = new JArray();
((JArray)titles[i]["Title"]).Add(clone);
}
}
return body.ToString();
}</set-body>
</inbound>
Response:
{
"TitlesResponse": {
"Titles": [
{
"Title": [
{
"Name": "BookTitle-1",
"Author": "BookTitle-2"
},
{
"Name": "BookTitle-1",
"Author": "BookTitle-2"
}
]
},
{
"Title": [
{
"Name": "BookTitle-1"
}
]
}
]
}
}