sample transformation from xml to json using wso2 enrich

GetOrderIdsForDataExtractionRequest_Transform.xml

<?xml version="1.0" encoding="UTF-8"?>
<sequence name="GetOrderIdsForDataExtractionRequest_Transform"
          trace="disable"
          xmlns:orders="http://imshealth.com/bdf/esb/client/orders/schemas/"
          xmlns="http://ws.apache.org/ns/synapse">

    <!--Remove wrapper element (GetOrderIdsForDataExtraction) by replacing it with his child (Deliverables)-->

    <!--example input-->

    <!--<orders:GetOrderIdsForDataExtraction xmlns:orders="http://imshealth.com/bdf/esb/client/orders/schemas/">
        <orders:Deliverables>
            <orders:DeliverableCd>TDW</orders:DeliverableCd>
        </orders:Deliverables>
        <orders:Deliverables>
            <orders:DeliverableCd>NPA</orders:DeliverableCd>
        </orders:Deliverables>
    </orders:GetOrderIdsForDataExtraction>-->

    <!--Check wheter Deliverables has only one child node-->
    <filter xpath="not(boolean(//orders:Deliverables[2]))">
        <then>
            <!--Manually prepare one element json array-->
            <payloadFactory media-type="json">
                <format>
                    {
                    "Deliverables": [
                    {
                    "DeliverableCd": "$1"
                    }
                    ]
                    }
                </format>
                <args>
                    <arg expression="//orders:Deliverables/orders:DeliverableCd[1]"/>
                </args>
            </payloadFactory>
        </then>
    </filter>
    <!--Automatically transform xml -> json-->

    <enrich>
        <source type="custom" xpath="//orders:Deliverables"/>
        <target type="body" />
    </enrich>

    <call-template target="tnscommon_PrepareRequest">
        <with-param name="dataFormatParam" value="json"/>
    </call-template>

</sequence>