使用JOLT进行JSON转换

如何解决使用JOLT进行JSON转换

我正在尝试使用JOLT(使用NiFi JoltTransformJson处理器)将JSON转换为其他格式。对于单个JSON记录,正在使用的JOLT在JOLT应用程序演示中工作正常,而如果我执行多个JSON记录,则在JOLT应用程序演示中无法获得预期的输出。任何人都可以纠正我在JOLT规范中需要进行哪些其他更改才能处理多个JSON记录。

示例输入json

[
  {
    "pool": {
      "field": [
        {
          "name": "BillingDay","value": "12"
        },{
          "name": "Custom1","value": "POOL_BASE_PLAN_3GB"
        }
     ]
    },"usage": {
      "version": "3","quota": {
        "name": "POOL_TOP_UP_1GB_2","cid": "5764888998010953848"
      }
    },"state": {
      "version": "1","property": [
        {
          "name": "SMS_RO_TOP","value": "1"
        },{
          "name": "BillingTimeStamp","value": "2020-06-12T01:00:05"
        },{
          "name": "timereset","value": "2020-01-12T00:35:53"
        }
      ]
    }
  },{
    "pool": {
      "field": [
        {
          "name": "PoolID","value": "111100110000003505209"
        },{
          "name": "BillingDay","value": "9"
        }
      ]
    },"usage": {
      "version": "3"
    },"property": [
        {
          "name": "BillingTimeStamp","value": "2020-06-09T01:00:05"
        },"value": "2019-03-20T17:10:38"
        }
      ]
    }
  }
]

JOLT使用:

[
{
    "operation": "modify-default-beta","spec": {
      "state": {
        "property": {
          "name": "NOTAVAILABLE"
        }
      },"usage": {
        "quota": {
          "name": "NOTAVAILABLE"
        }
      }
    }
  },{
    "operation": "shift","spec": {
      "pool": {
        "field": {
           "*": {
            "value": "pool_item.@(1,name)"
          }
        }
      },// remaining elements print as it is
      "*": "&"
    }
    }

]

预期的输出JSON:

[
  {
  "pool_item" : {
    "BillingDay" : "12","Custom1" : "POOL_BASE_PLAN_3GB"    
  },"usage" : {
    "version" : "3","quota" : {
      "name" : "POOL_TOP_UP_1GB_2","cid" : "5764888998010953848"
    }
  },"state" : {
    "version" : "1","property" : [ {
      "name" : "SMS_RO_TOP","value" : "1"
    },{
      "name" : "BillingTimeStamp","value" : "2020-06-12T01:00:05"
    },{
      "name" : "timereset","value" : "2020-01-12T00:35:53"
    } ]
  }
},{
  "pool_item" : {
    "BillingDay" : "9","PoolID" : "111100110000003505209"    
  },"quota" : {
      "name" : "NOTAVAILABLE"
    }
  },"value" : "2020-01-12T00:35:53"
    } ]
  }
}

]

解决方法

以下 jolt shift 规范适用于输入数组中的多个 json。

[

  {
    "operation": "shift","spec": {
      "*": {
        "pool": {
          "field": {
            "*": {
              "value": "[&4].pool_item.@(1,name)"
            }
          }
        },"usage": "[&1].usage","state": "[&1].state"
      }
    }
    }

]

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