Jackson read json in generic List

Question

I\'m using Jackson in order to read json messages. One of the values that I\' trying to parse is a List and another value contains the type of the data in the list. This is

Answer 1

If you need to map the incoming json to your List you can do like this

String jsonString = ...; //Your incoming json string
ObjectMapper mapper = new ObjectMapper();
Class clz = Class.forName(yourTypeString);
JavaType type = mapper.getTypeFactory().constructCollectionType(List.class, clz);
List  result = mapper.readValue(jsonString, type);

Edit

Something like this, completly untested and never done

public Message deserialize(JsonParser jsonParser, DeserializationContext arg1)
    throws IOException, JsonProcessingException {
    ObjectMapper mapper = new ObjectMapper();
    ObjectCodec oc = jsonParser.getCodec();
    JsonNode node = oc.readTree(jsonParser);

    JsonNode timeStamp = node.get("time");
    Timestamp time = mapper.readValue(timeStamp, Timestamp.class);
    JsonNode restAction = node.get("action");
    RestAction action = mapper.readValue(restAction, RestAction.class);
    String type = node.get("type").getTextValue();
    Class clz = Class.forName(type);
    JsonNode list = node.get("data");
    JavaType listType = mapper.getTypeFactory().constructCollectionType(List.class,   clz);
    List  data = mapper.readValue(list, listType);

    Message message = new Message;
    message.setTime(time);
    message.setAction(action);
    message.setType(type);
    message.setData(data);

    return message;
}