content: package com.alibaba.fastjson2.issues_1000;
  
  import com.alibaba.fastjson2.JSON;
  import com.alibaba.fastjson2.JSONReader;
  import com.alibaba.fastjson2.annotation.JSONType;
  import com.alibaba.fastjson2.reader.ObjectReader;
  import lombok.Data;
  import org.junit.jupiter.api.Test;
  
  import java.lang.reflect.Type;
  import java.util.Map;
  import java.util.Objects;
  
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  
  public class Issue1168 {
      @Test
      void test01() {
          String json1 = "{\"inner\":{\"id\":\"1\"}}";
          Wrapper wrapper = JSON.parseObject(json1, Wrapper.class); // Type参数有值
          System.out.println(wrapper);
  
          String json2 = "{\"id\":\"1\"}";
          Inner inner = JSON.parseObject(json2, Inner.class); // Type为空
          assertNotNull(inner);
      }
  
      public static class InnerReader
              implements ObjectReader<Inner> {
          @Override
          public Inner readObject(JSONReader reader, Type type, Object name, long features) {
              if (type == null) {
                  return null;
              }
              Map<String, Object> map = reader.readObject();
              Inner inner = new Inner();
              inner.setId(Objects.toString(map.get("id")));
              return inner;
          }
      }
  
      @Data
      public static class Wrapper {
          private Inner inner;
      }
  
      @Data
      @JSONType(deserializer = InnerReader.class)
      public static class Inner {
          private String id;
      }
  }
  