Dataweave中的JSON属性

Question

我在请求正文中有以下JSON。

{
  "Type": "Person",
  "IndividualId": "acd47048-bd80-476e-aa33-741bd5cb05d3",
  "Attributes": [
    {"Name":"FirstName","Value":"John"},
    {"Name":"LastName","Value":"Stewart"},
    {"Name":"Company","Value":"ABC"}
    {"Name":"Country","Value":"United States"}
  ]
}

我想要的是将属性提取为命名字段，如：

{
 "FirstName"="John",
 "LastName"="Stewart",
 "Company"="ABC",
 "Country"="United States"
}

无论如何迭代它并在Dataweaver或其他任何方式中提取命名属性？此请求正文可以包含任何数量的属性，不限于示例中的属性。

Answer 1

您可以使用dataweave对输入有效负载进行操作。输出可以根据您的要求为json或java。以下代码应该可以工作。

        <dw:transform-message doc:name="Transform Message">
            <dw:input-payload mimeType="application/json"/>
            <dw:set-payload><![CDATA[%dw 1.0
%output application/json
---
{(payload.Attributes map {
    ($.Name) : $.Value
})}]]>
            </dw:set-payload>
        </dw:transform-message>

希望这有帮助。

Answer 2

只需使用for loop，如下所示： - 的 Soultion1 ：

    <http:listener-config name="HTTP_Listener_Configuration" host="0.0.0.0" port="8081" doc:name="HTTP Listener Configuration"/>

    <flow name="testFlow">
       <http:listener config-ref="HTTP_Listener_Configuration" path="/store" doc:name="HTTP"/>
       <expression-component doc:name="Expression">
        <![CDATA[
          StringBuffer sb = new StringBuffer();
          flowVars.stBuffer=sb;
          ]]>
        </expression-component>
        <set-variable variableName="counter" value="1" doc:name="Variable"/>  
        <json:json-to-object-transformer returnClass="java.lang.Object" doc:name="JSON to Object"/>
        <foreach collection="#[payload.Attributes]" doc:name="For Each">
        <expression-component doc:name="Expression">
        <![CDATA[

         if(Integer.parseInt(flowVars.counter)>1)
         {
          flowVars.stBuffer.append(","+'"'+payload.Name+'" = "'+payload.Value+'"').toString()
         }
       else
        {
         flowVars.stBuffer.append('"'+payload.Name+'" = "'+payload.Value+'"').toString()
        }
         flowVars.counter= flowVars.counter +1;
       ]]>
      </expression-component>     
       </foreach> 
       <set-payload value="{#[flowVars.stBuffer.toString()]}" doc:name="Set Payload"/> 
  </flow>

解决方案2： Dataweave

   <flow name="testtFlow">
       <http:listener config-ref="HTTP_Listener_Configuration" path="/store" doc:name="HTTP"/>
       <dw:transform-message doc:name="Transform Message">
         <dw:set-payload><![CDATA[%dw 1.0
        %output application/java
        ---
    //This will iterate the value
        {
         (payload.Attributes map {
            ($.Name) : $.Value
        })
    }]]></dw:set-payload>
       </dw:transform-message>
       <object-to-string-transformer doc:name="Object to String"/>
   </flow>

输出将是： - {"FirstName" = "John","LastName" = "Stewart","Company" = "ABC","Country" = "United States"}