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?

can you post class (if any) which you are using to de/serialize.. — Bharatesh
– Bharatesh, Commented Apr 25, 2016 at 12:46

Chaitu · Accepted Answer · 2016-04-25 10:49:18Z

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);

answered Apr 25, 2016 at 10:49

Chaitu

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1 Comment

Jose M Lechon Over a year ago

I was looking for a Flag, not a hack. But I'll try it. Thanks!

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