如何使用DataWeave在嵌套数组中过滤提取指定条件的xrefValue值？

需求说明 #

从给定的Payload数据中，提取所有systemCode等于"SYS2"的xrefValue字段值，生成新的数组。

原始Payload数据 #

{
  "objectCode": "Sampleobj",
  "masterObjectValues": [
    {
      "systemCode": "MASTER",
      "systemObjectValues": [
        {
          "codeId": "001",
          "code": "CD1",
          "crossRef": [
            {
              "systemCode": "SYS1",
              "xrefValue": "DR1"
            },
            {
              "systemCode": "SYS2",
              "xrefValue": "DR2"
            }
          ]
        },
        {
          "codeId": "002",
          "code": "CD2",
          "crossRef": [
            {
              "systemCode": "SYS1",
              "xrefValue": "MR"
            },
            {
              "systemCode": "SYS2",
              "xrefValue": "Mister"
            }
          ]
        }
      ]
    }
  ]
}

提取结果 #

[
  "DR2","Mister"
]

内容的提问来源于stack exchange，提问作者Nimesh Gayanga