Question

我是个新手。我有以下问题，我有一个JSON文档结构，可能会根据type属性而有所不同。请参阅下面的示例。 { "recipientId": "xxx", "messages": [ { "type": "text", "text": "hi there!" }, { "type": "image", "url": "http://example.com/image.jpg", "preview": "http://example.com/thumbnail.jpg" } ] } 转换后我想收到以下输出： { "messages" : [ { "text" : "hi there!", "type" : "text" }, { "type" : "image", "url" : "http://example.com/image.jpg", "preview": "http://example.com/thumbnail.jpg" } ], "to" : "xxx" }

以下是我提出的规范： [ { "operation": "shift", "spec": { "recipientId": "to", "messages": { "*": { "type": "messages[&1].type", "text": "messages[&1].text", "url": "messages[&1].url", "preview": "messages[&1].previewImageUrl" } } } } ]

这种方法的问题在于，如果我有"type": "text"并且如果我也将"preview"属性与值一起抛出，那么它将没有意义，因为类型text不应该{ {1}}属性集。所以，我想要根据＆＃34; type＆＃34;的值来忽略一些属性。财产或避免转换此类有效载荷。

有没有办法做到这样做＆＃34;验证＆＃34;在JOLT？我看到的另一个选项是用Jackson类型层次结构来验证它。

Answer 1

您可以做的是匹配＆＃34;键入＆＃34;的值，然后将树跳回一些，并将消息作为＆＃34;文本＆＃34;处理。键入或＆＃34;图像＆＃34;类型。

输入

{
  "recipientId": "xxx",
  "messages": [
    {
      "type": "text",
      "text": "hi there!",
      "preview": "SHOULD NOT PASS THRU"
    },
    {
      "type": "image",
      "url": "http://example.com/image.jpg",
      "preview": "http://example.com/thumbnail.jpg"
    }
  ]
}

规格

[
  {
    "operation": "shift",
    "spec": {
      "recipientId": "to",
      "messages": {
        "*": { // the array index of the messages array, referenced below 
               // as [&2] or [&4] depending how far down they have gone 
          "type": {
            // always pass the value of type thru
            "@": "messages[&2].type",

            "text": {
              // if the value of type was "text", then
              //  go back up the tree 3 levels (0,1,2)
              //  and process the whole message as a "text" type
              "@2": {
                "text": "messages[&4].text"
              }
            },
            "image": {
              "@2": {
                // if the value of type was "image", then
                //  go back up the tree 3 levels (0,1,2)
                //  and process the whole message as a "image" type
                "url": "messages[&4].url",
                "preview": "messages[&4].previewImageUrl"
              }
            }
          }
        }
      }
    }
  }
]

JOLT子树验证基于其中一个属性值

1 个答案: