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在 Dataweave 2.0 中将属性从属性文件转换为 json

[英]Convert properties from properties file into json in Dataweave 2.0

如何从属性文件转换属性

creditmaster.metadata.AverageFicoScore=700
creditmaster.a.b.c=xyz

以通用方式进入此 json 格式

{
  creditmasterMetaData: [
     {
       attributeKey: "AverageFicoScore",
       attributeValue: 700
     }
  ]
}

这个脚本是通用的,因为它不关心键的部分是什么,它只按第一个元素(第一个点之前)和最后一个点之后的键名分组,它忽略了中间的所有内容:

%dw 2.3
output application/java
import * from dw::core::Strings

fun mapProperties(props) = 
    entriesOf(props) // since Mule 4.3 / DW 2.3
        filter (substringAfter($.key, ".") startsWith "metadata.") // to filter keys with .metadata.
        groupBy ((item, index) -> substringBefore(item.key, ".")) 
        mapObject ((value, key, index) ->  
            (key): value map {
                attributeKey: substringAfterLast($.key, "."),
                attributeValue: if (isInteger($.value)) $.value as Number else $.value
            }
        )
---
mapProperties(payload)

输入文件:

creditmaster.metadata.AverageFicoScore= 700
other.a.b= 123
creditmaster.a.b.c=xyz
something.metadata.another.maximum=456
creditmaster.metadata.different.minimum=500

Output(为了清楚起见,在 JSON 中):

{
  "something": [
    {
      "attributeKey": "maximum",
      "attributeValue": "456"
    }
  ],
  "creditmaster": [
    {
      "attributeKey": "minimum",
      "attributeValue": "500"
    },
    {
      "attributeKey": "AverageFicoScore",
      "attributeValue": "700"
    }
  ]
}

一种替代方法是使用pluck function。 它允许您遍历接收条目的 object。

如果你有这个输入

{
  "creditmaster": {
    "metadata": {
      "AverageFicoScore": "700",
      "OtherData": "Some value"
    }
  }
}

通过这种转变

{
  creditmasterMetaData:
    payload.creditmaster.metadata pluck ((value, key, index) -> 
      {
        attributeKey: key,
        attributeValue: value
      }
    )
}

你得到这个 output

{
  "creditmasterMetaData": [
    {
      "attributeKey": "AverageFicoScore",
      "attributeValue": "700"
    },
    {
      "attributeKey": "OtherData",
      "attributeValue": "Some value"
    }
  ]
}

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