We are calling an External WebService that is returning us the JSON Object. In that Json Object they are sending the PDF as ByteArray(JsonArray) not as Base64 String. So am thinking is there a way to convert that ByteArray/JsonArray to Base64 String that will allow us to make PDF in SFDC end.
Sample Response Json we are getting.(The actual Array is too huge, i have removed some array values just to post it here)
{"FINISHED":[[37,80,68,70,45,49,46,52,10,37,-57,-27,-12,-27,-16,10,51,32,48,32]]}
Create a response Object like this
public class Resp {
public List<List<Integer>> FINISHED { get; set; }
}
then do
Resp r = (Resp) JSON.deserialize(jsonString, Resp.class);
and then finally convert the r.FINISHED into a Blob
List<Integer> values = r.FINISHED.get(0);
String encodedString = String.fromCharArray(values);
Blob someFile = EncodingUtil.base64Decode(encodedString);
(Thanks to @Bachovski for pointing to the fromCharArray function)
List <Integer> charArr = new List <Integer> {97,65}; String resultString = String.fromCharArray(charArr);