将字符串转换为布尔Mule4 Dataweave

问题描述

我有mule4 DW表达式，我想将其转换为布尔值，因为“布尔值”无法正常工作，或者可能是我放错了位置。

DW表达式：

%dw 2.0
output application/java
ns ns0 http://www.demandware.com/xml/impex/order/2006-10-31
---
[{
    Id: (payload.ns0#order.ns0#"custom-attributes".*ns0#"custom-attribute" filter(item) -> (item.@"attribute-id" == "sscAccountid")) [0],Marketing_Opt_in__c: (payload.ns0#order.ns0#"custom-attributes".*ns0#"custom-attribute" filter(item) -> (item.@"attribute-id" == "newsLetterRegistration")) [0] //***This output I want to convert into Boolean***
    
}]

XML标签

<custom-attribute attribute-id="newsLetterRegistration">false</custom-attribute>

解决方法

[{
Id: (payload.order."custom-attributes".*"custom-attribute" filter(item) -> (item.@"attribute-id" == "sscAccountid"))[0],Marketing_Opt_in__c: (payload.order."custom-attributes".*"custom-attribute" filter(item) -> (item.@"attribute-id" == "newsLetterRegistration"))[0]
 ~= 'True'  //***This output I want to convert into Boolean***
}]

要使其不区分大小写，请将比较的两端都转换为一个大小写，例如大写

upper((item.@"attribute-id" == "newsLetterRegistration"))[0])
     ~= 'TRUE' 

另一种方法是使用Java布尔类，该类会自动执行此强制转换。

(item.@"attribute-id" == "newsLetterRegistration"))[0] as Boolean