Jackson deserialization convertValue vs readValue

Question

I have a org.json.JSONArray that contains JSONObjects and I am trying to map those to a POJO. I know the type of the POJO I want to map to. I have 2 options and I m trying to figure out which is better in performance.

Option 1:

ObjectMapper mapper = new ObjectMapper();
ObjectReader reader = mapper.reader().withType(MyPojo.class);

for (int i = 0; i < jsonArr.length(); i++) {
    JSONObject obj = jsonArr.getJSONObject(i);
    MyPojo pojo = reader.readValue(obj.toString());

    ... other code dealing with pojo...
}

Option 2:

ObjectReader mapper = new ObjectMapper();

for (int i = 0; i < jsonArr.length(); i++) {
    JSONObject obj = jsonArr.getJSONObject(i);
    MyPojo pojo = mapper.convertvalue(obj, MyPojo.class);

    ... other code dealing with pojo...
}

For sake of argument, lets assume the length of the JSONArray is 100.

From what I have looked so far from the source code, option 1 seems better since the Deserialization context and the Deserializer is created only once, while in case of option 2, it will be done for each call.

Thoughts?

Thanks!

Answer 1

Its simple

• For converting json string to class type use readValue
• For converting object type to class type use convertValue

On printing, object looks like this SampleClass(id=61, applicationReference=AP251, accountId=fghsdjffhhjf)

On printing, jsonString a looks like this {"method":"POST","url": "xyz.com"}