如何使用JOLT规范删除父JSON字段和修改输入JSON字段？

{
  "operation": "remove",
  "spec": {
    "parentField": ""
  }
}

{
  "operation": "modify-default-beta",
  "spec": {
    "valueField": "newValue"
  }
}

import com.bazaarvoice.jolt.Chainr;
import com.bazaarvoice.jolt.JsonUtils;

public class JoltExample {
    public static void main(String[] args) {
        // 定义规范文件
        String specificationJson = "[\n" +
                "  {\n" +
                "    \"operation\": \"remove\",\n" +
                "    \"spec\": {\n" +
                "      \"parentField\": \"\"\n" +
                "    }\n" +
                "  },\n" +
                "  {\n" +
                "    \"operation\": \"modify-default-beta\",\n" +
                "    \"spec\": {\n" +
                "      \"valueField\": \"newValue\"\n" +
                "    }\n" +
                "  }\n" +
                "]";

        // 加载规范
        Chainr chainr = Chainr.fromSpec(JsonUtils.jsonToObject(specificationJson));

        // 输入JSON数据
        String inputJson = "{\n" +
                "  \"parentField\": {\n" +
                "    \"valueField\": \"oldValue\"\n" +
                "  }\n" +
                "}";

        // 执行转换
        Object transformedOutput = chainr.transform(JsonUtils.jsonToObject(inputJson));

        // 输出转换结果
        String outputJson = JsonUtils.toJsonString(transformedOutput);
        System.out.println(outputJson);
    }
}