XML 使用 dataweave 2 解析以转换 json

Question

我正在尝试递归解析 XML 以使用 dataweave 2 创建 JSON 数组，但我无法这样做。

我的输入 XML 如下 -

<?xml version="1.0" encoding="utf-16"?>
<MessageParts xmlns="http://schemas.microsoft.com/dynamics/2011/01/documents/Message">
  <BillsOfMaterials xmlns="http://schemas.microsoft.com/dynamics/2008/01/documents/BillsOfMaterials">
    <SenderId>121</SenderId>
    <BOMVersion class="entity">
      <BOMId>BOM0012605</BOMId>
      <ItemId>9650084</ItemId>
      <ItemIdCommercial></ItemIdCommercial>
      <Name>SmartRip for Folding Carton</Name>
      <RecId>5637161103</RecId>
      <BOMTable class="entity">
        <BOMId>BOM0012605</BOMId>
        <Name>SmartRip for Folding Carton</Name>
        <RecId>5637160354</RecId>
        <BOM class="entity">
          <BOMId>BOM0012605</BOMId>
          <BOMQty>1.0000</BOMQty>
          <BOMType>Item</BOMType>
          <ItemId>9650092</ItemId>
          <RecId>5637307757</RecId>
          <UnitId>PCS</UnitId>
          <InventDimBOM class="entity">
            <RecId>5637213290</RecId>
          </InventDimBOM>
          <BOMTable>
            <BOMId>BOM0012613</BOMId>
            <Name>FlexRip Classic Intel kernel and tools</Name>
            <RecId>5637161355</RecId>
            <BOM>
              <BOMType>Item</BOMType>
              <ItemId>9650079</ItemId>
              <BOMQty>1.00</BOMQty>
              <UnitId>PCS</UnitId>
              <BOMId>BOM0012613</BOMId>
              <RecId>5637307799</RecId>
            </BOM>
            <BOM>
              <BOMType>Item</BOMType>
              <ItemId>9644919T</ItemId>
              <BOMQty>1.00</BOMQty>
              <UnitId>PCS</UnitId>
              <BOMId>BOM0012613</BOMId>
              <RecId>5637307800</RecId>
            </BOM>
            <BOM>
              <BOMType>Item</BOMType>
              <ItemId>9644920</ItemId>
              <BOMQty>1.00</BOMQty>
              <UnitId>PCS</UnitId>
              <BOMId>BOM0012613</BOMId>
              <RecId>5637307801</RecId>
            </BOM>
            <BOM>
              <BOMType>Item</BOMType>
              <ItemId>9700720Z</ItemId>
              <BOMQty>1.00</BOMQty>
              <UnitId>PCS</UnitId>
              <BOMId>BOM0012613</BOMId>
              <RecId>5637307802</RecId>
              <BOMTable>
                <BOMId>BOM012173</BOMId>
                <Name></Name>
                <RecId>5637157832</RecId>
                <BOM>
                  <BOMType>Item</BOMType>
                  <ItemId>9700595</ItemId>
                  <BOMQty>1.00</BOMQty>
                  <UnitId>PCS</UnitId>
                  <BOMId>BOM012173</BOMId>
                  <RecId>5637333626</RecId>
                </BOM>
              </BOMTable>
              <BOMTable>
                <BOMId>BOM012173</BOMId>
                <Name></Name>
                <RecId>5637157832</RecId>
                <BOM>
                  <BOMType>Item</BOMType>
                  <ItemId>9700595</ItemId>
                  <BOMQty>1.00</BOMQty>
                  <UnitId>PCS</UnitId>
                  <BOMId>BOM012173</BOMId>
                  <RecId>5637333626</RecId>
                </BOM>
                <BOM>
                  <BOMType>Item</BOMType>
                  <ItemId>9608224Z</ItemId>
                  <BOMQty>1.00</BOMQty>
                  <UnitId>PCS</UnitId>
                  <BOMId>BOM012173</BOMId>
                  <RecId>5637333627</RecId>
                </BOM>       
              </BOMTable>
            </BOM>
            <BOM>
              <BOMType>Item</BOMType>
              <ItemId>9683336L</ItemId>
              <BOMQty>1.00</BOMQty>
              <UnitId>PCS</UnitId>
              <BOMId>BOM0012613</BOMId>
              <RecId>5637307803</RecId>
              <BOMTable>
                <BOMId>BOM0012781</BOMId>
                <Name>Esko Suite 12.1 A5 Software box</Name>
                <RecId>5637165603</RecId>
                <BOM>
                  <BOMType>Item</BOMType>
                  <ItemId>G211249</ItemId>
                  <BOMQty>1.00</BOMQty>
                  <UnitId>PCS</UnitId>
                  <BOMId>BOM0012781</BOMId>
                  <RecId>5637309242</RecId>
                </BOM>
              </BOMTable>
              <BOMTable>
                <BOMId>BOM0012781</BOMId>
                <Name>Esko Suite 12.1 A5 Software box</Name>
                <RecId>5637165603</RecId>
                <BOM>
                  <BOMType>Item</BOMType>
                  <ItemId>G211249</ItemId>
                  <BOMQty>1.00</BOMQty>
                  <UnitId>PCS</UnitId>
                  <BOMId>BOM0012781</BOMId>
                  <RecId>5637309242</RecId>
                </BOM>
                <BOM>
                  <BOMType>Item</BOMType>
                  <ItemId>G25583961_24</ItemId>
                  <BOMQty>1.00</BOMQty>
                  <UnitId>PCS</UnitId>
                  <BOMId>BOM0012781</BOMId>
                  <RecId>5637309243</RecId>
                </BOM>
              </BOMTable>
            </BOM>
          </BOMTable>
        </BOM>
        <BOM class="entity">
          <BOMId>BOM0012605</BOMId>
          <BOMQty>1.0000</BOMQty>
          <BOMType>Item</BOMType>
          <ItemId>9608221Z</ItemId>
          <RecId>5637307758</RecId>
          <UnitId>PCS</UnitId>
          <InventDimBOM class="entity">
            <RecId>5637213290</RecId>
          </InventDimBOM>
        </BOM>
        <BOM class="entity">
          <BOMId>BOM0012605</BOMId>
          <BOMQty>1.0000</BOMQty>
          <BOMType>Item</BOMType>
          <ItemId>9700624Y</ItemId>
          <RecId>5637307759</RecId>
          <UnitId>PCS</UnitId>
          <InventDimBOM class="entity">
            <RecId>5637213291</RecId>
          </InventDimBOM>
          <BOMTable>
            <BOMId>BOM012172</BOMId>
            <Name></Name>
            <RecId>5637157831</RecId>
            <BOM>
              <BOMType>Item</BOMType>
              <ItemId>9644921</ItemId>
              <BOMQty>1.00</BOMQty>
              <UnitId>PCS</UnitId>
              <BOMId>BOM012172</BOMId>
              <RecId>5637333624</RecId>
            </BOM>
          </BOMTable>
        </BOM>
        <BOM class="entity">
          <BOMId>BOM0012605</BOMId>
          <BOMQty>1.0000</BOMQty>
          <BOMType>Item</BOMType>
          <ItemId>9700815</ItemId>
          <RecId>5637307760</RecId>
          <UnitId>PCS</UnitId>
          <InventDimBOM class="entity">
            <RecId>5637213290</RecId>
          </InventDimBOM>
        </BOM>
      </BOMTable>
      <InventDim class="entity">
        <RecId>5637199988</RecId>
      </InventDim>
    </BOMVersion>
  </BillsOfMaterials>
</MessageParts>

我想创建 JSON 所有 BOM 的数组（没有层次结构的平面结构），parentId 作为父 BOM 的 RecId，如下所示 -

输出-

[
    {
        "id": "5637307757",
        "productId": "9650092",                                                                                                                                 
        "parentId": null
    },
    {
        "id": "5637307799",
        "productId": "9650079",
        "parentId": "5637307757"
    },
    {
        "id": "5637307800",
        "productId": "9644919T",
        "parentId": "5637307757"
    },
    {
        "id": "5637307801",
        "productId": "96AR060W",
        "parentId": "5637307757"
    },
    
    {
        "id": "5637307802",
        "productId": "9700720Z",
        "parentId": "5637307757"
    },
    {
        "id": "5637333626",
        "productId": "9700595",
        "parentId": "5637307802"
    },  
    
    {
        "id": "5637333626",
        "productId": "9700595",
        "parentId": "5637307802"
    },
    {
        "id": "5637333627",
        "productId": "9608224Z",
        "parentId": "5637307802"
    },  
    {
        "id": "5637307803",
        "productId": "9683336L",
        "parentId": "5637307757"
    },
    {
        "id": "5637309242",
        "productId": "G211249",
        "parentId": "5637307803"
    },
    {
        "id": "5637309242",
        "productId": "G211249",
        "parentId": "5637307803"
    },
    {
        "id": "5637309243",
        "productId": "G25583961_24",
        "parentId": "5637307803"
    }
]

映射规则-

id : BOM -> RecId
productId : BOM -> ItemId
parentId : 父BOM的RecId

与建议答案的不同之处在于，我需要使用 BOM 的直接 recid 设置 parentid，而不是 BOM table。

Answer 1

似乎您的输出在给定输入的情况下仍然是错误的（例如，产品 ID 96AR060W 不在输入 xml 中）。要回答您的问题而不是收集所有 BOM 对象，您可以遍历单个 BOM 对象以保存父 ID 并创建一个可以递归调用的函数。请看下面的数据编织：

%dw 2.0
output application/json

fun parseBOM(bomData, parentId) = 
    if (bomData.BOMTable.BOM?) 
        [{
            id: bomData.RecId,
            productId: bomData.ItemId,
            parentId: parentId  
        }] ++ (bomData.BOMTable.*BOM flatMap parseBOM($, bomData.RecId))
    else {
        id: bomData.RecId,
        productId: bomData.ItemId,
        parentId: parentId
    }

---
using (firstBOMTable =  payload.MessageParts.BillsOfMaterials.BOMVersion.BOMTable)
firstBOMTable.*BOM flatMap parseBOM($, null)

鉴于您的输入 xml，这将导致

[
  {
    "id": "5637307757",
    "productId": "9650092",
    "parentId": null
  },
  {
    "id": "5637307799",
    "productId": "9650079",
    "parentId": "5637307757"
  },
  {
    "id": "5637307800",
    "productId": "9644919T",
    "parentId": "5637307757"
  },
  {
    "id": "5637307801",
    "productId": "9644920",
    "parentId": "5637307757"
  },
  {
    "id": "5637307802",
    "productId": "9700720Z",
    "parentId": "5637307757"
  },
  {
    "id": "5637333626",
    "productId": "9700595",
    "parentId": "5637307802"
  },
  {
    "id": "5637333627",
    "productId": "9608224Z",
    "parentId": "5637307802"
  },
  {
    "id": "5637307803",
    "productId": "9683336L",
    "parentId": "5637307757"
  },
  {
    "id": "5637309242",
    "productId": "G211249",
    "parentId": "5637307803"
  },
  {
    "id": "5637309243",
    "productId": "G25583961_24",
    "parentId": "5637307803"
  },
  {
    "id": "5637307758",
    "productId": "9608221Z",
    "parentId": null
  },
  {
    "id": "5637307759",
    "productId": "9700624Y",
    "parentId": null
  },
  {
    "id": "5637333624",
    "productId": "9644921",
    "parentId": "5637307759"
  },
  {
    "id": "5637307760",
    "productId": "9700815",
    "parentId": null
  }
]

该函数的作用是，如果提供的对象 (bomData) 包含 BOMTable.BOM，则创建所需的对象并使用其下的所有 BOM 对象再次调用相同的函数。该函数也接受 parentId 作为参数来保存它。

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