Mule DWL - 扁平化json层次元素。

Question

我的json有效载荷如下。

Attributes:{
    Contact:{
        Address:{
            PersonName:"John",
            Line1:"sdsds",
            Line2:"sdsdsd",
            SubAddress:{
                PersonName:"John",
                Line1:"ggghg",
                Line2:"xzxzxzx"
            }
        },
        Phone:{
            Home:"2323232323",
            Office:"4545454545"
        }
    },
    Id:"2343434",
    order:"3343434"
}

我想把层次结构扁平化到下面输出。

Attributes:{
    Contact.Address.PersonName:"John",
    Contact.Address.Line1:"sdsds",
    Contact.Address.Line2:"sdsdsd",
    Contact.Address.SubAddress.PersonName:"John",
    Contact.Address.SubAddress.Line1:"ggghg",
    Contact.Address.SubAddress.Line2:"xzxzxzx",
    Contact.Phone.Home:"2323232323",
    Contact.Phone.Office:"4545454545",
    Id:"2343434",
    order:"3343434"
}

Attributes元素可以有任何数量的复杂元素，如 "地址 "和 "联系人"。我们在编码时不会知道复杂元素的键值。DWL应能产生单级输出。想要在Mule 3中使用dw1来解决这个扁平化的通用方案。请你帮忙

Answer 1

下面的脚本递归地查看有效载荷，并构建单个键值对对象。

%dw 1.0
%output application/json
%var payload = {"Attributes":{"Contact":{"Address":{"SubAddress":[{"PersonName1":"John","Line1":"ggghg","Line2":"xzxzxzx"},{"PersonName":"Jar","Line1":"ggghg","Line2":"xzxzxzx"}]},"Phone":{"Home":"2323232323","Office":"4545454545"}},"Id":"2343434","order":"3343434"}}
%function constructKeys(oldKeys, newKey) oldKeys ++ '.' ++ newKey
%function writeData(json ,output, keys)  json match {
            case is :null -> null,
            case is :array -> {(json map ((item, index) -> writeData(item, output, keys ++ index)))},
            case is :object -> {((json pluck $$) map writeData(json[$],output,constructKeys(keys,$)))},
            default -> output ++ {(keys[1 to -1]): json }
}
---
Attributes: writeData(payload.Attributes,{}, '')