GSON: convert JSON with null array field into empty array

Question

How can I say to GSON that if a JSON with an array field has NULL value, it has to create an empty array instead of setting a null?

are there any properties or Flags available for this?

Answer 1

You can do some workaround before you pass your json to Gson.

String currentKeyTags = "\"KeyTags\":null";
String expectedKeyTags = "\"KeyTags\":[]";

String jsonArrayString= jsonArray.toString()
                        .replaceAll(currentKeyTags, expectedKeyTags);

Now:

 Gson gson=new Gson();
     Type listType = new TypeToken<List<?>>() {
                }.getType();
    List<?> lists = gson.fromJson(jsonArrayString, listType);