java - 在父抽象类函数中获取子类对象

Question

我正在尝试编写一个抽象类，它将使用jackson-databind的ObjectMapper将字符串值映射到对象成员变量，反之亦然。这个抽象类将由json的每个pojo扩展。

import java.io.IOException;    
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;

public abstract class JsonToString {

    public JsonToString toObject(String jsonString){

        ObjectMapper mapper = new ObjectMapper();
        try {
            mapper.readValue(jsonString, this.getClass());//problem
            System.out.println("inside object function of jsontostring : "+this);
        } catch (JsonParseException e) {
            System.out.println("Exception occured in mapping jsonString received to object" + e);
        } catch (JsonMappingException e) {
            System.out.println("Exception occured in mapping jsonString received to object" + e);
        } catch (IOException e) {
            System.out.println("Exception occured in mapping jsonString received to object" + e);
        }
        return this;        
    }
    public String toString(){
        ObjectMapper mapper = new ObjectMapper();
        String json = new String();
        try {
            json = mapper.writeValueAsString(this);
        } catch (JsonProcessingException e) {
            System.out.println("Trouble in mapping object to string in json class : "+this.getClass().getName());
        }
        return json;
    }   
}

这个课程将由每个json pojo扩展。

所以在这里我想返回已经完成映射的子类的对象。有人可以帮我拿到物品并将其归还。

我以这种方式调用此方法：

ITAGResponseInfo response = new ITAGResponseInfo();
response = (ITAGResponseInfo)response.toObject(cOutput);
System.out.println("Printing from the itagresponseinfo object : "+response);

此处ITAGResponseInfo扩展了JsonToString类。