JOLT 将对象转换为数组

Question

我正在尝试将以下对象转换为数组，该对象已按要求格式化，只需将其输出为包含该对象的数组即可。

[
  {
    "PLCTime": 1643804542000,
    "LevelID": "53.99.2",
    "Data1Type": "Axis1 Dist",
    "Data1": 1,
    "Data2Type": "Axis2 Dist",
    "Data2": 2,
    "Data3Type": "Axis3 Dist",
    "Data3": 3,
    "Data4Type": "Axis4 Dist",
    "Data4": 4,
    "Data5Type": "Axis5 Dist",
    "Data5": 5.5,
    "Data6Type": "Axis6 Dist",
    "Data6": 6
  }
]

我希望输出是一个包含一个对象的数组。目前我的规格是：

[
  {
    "operation": "shift",
    "spec": {
      "*": {
        "Data*Type": {
          "@(0)": "name"
        },
        "Data*": {
          "@(0)": "value"
        },
        "*": "&"
      }
    }
  },
  {
    "operation": "shift",
    "spec": {
      "LevelID": "assetId",
      "PLCTime": "dataPoints[].timestamp",
      "name": {
        "*": {
          "@": "dataPoints[0].measures[&].&2",
          "@(3,value[&])": "dataPoints[0].measures[&].value"
        }
      }
    }
  }
]

得到以下结果，但您可以看到结果不是数组。

{
  "assetId": "53.99.2",
  "dataPoints": [
    {
      "timestamp": 1643804542000,
      "measures": [
        {
          "name": "Axis1 Dist",
          "value": 1
        },
        {
          "name": "Axis2 Dist",
          "value": 2
        },
        {
          "name": "Axis3 Dist",
          "value": 3
        },
        {
          "name": "Axis4 Dist",
          "value": 4
        },
        {
          "name": "Axis5 Dist",
          "value": 5.5
        },
        {
          "name": "Axis6 Dist",
          "value": 6
        }
      ]
    }
  ]
}

我正在尝试的输出是：

[
  {
    "assetId": "53.99.2",
    "dataPoints": [
      {
        "timestamp": 1643804542000,
        "measures": [
          {
            "name": "Axis1 Dist",
            "value": 1
          },
          {
            "name": "Axis2 Dist",
            "value": 2
          },
          {
            "name": "Axis3 Dist",
            "value": 3
          },
          {
            "name": "Axis4 Dist",
            "value": 4
          },
          {
            "name": "Axis5 Dist",
            "value": 5.5
          },
          {
            "name": "Axis6 Dist",
            "value": 6
          }
        ]
      }
    ]
  }
]

例如需要包含在一组[]

中

Answer 1

你可以

在 right-hand 侧的标识符前加上 [0]. 作为第二次转换规范，以便将整个内容嵌套在方括号如

{
  "operation": "shift",
  "spec": {
    "LevelID": "[0].assetId",
    "PLCTime": "[0].dataPoints[].timestamp",
    "name": {
      "*": {
        "@": "[0].dataPoints[0].measures[&].&2",
        "@(3,value[&])": "[0].dataPoints[0].measures[&].value"
      }
    }
  }
}

或

将以下规范添加到当前规范中，或者

{
  "operation": "shift",
  "spec": {
    "@": "[]"
  }
}

JOLT 将对象转换为数组

JOLT transform object into an array

json

jolt

apache-nifi