CODEWITHSUNDEEP
mulemule-studio
James Jiang
James Jiang

Reputation: 2163

How to validate List<Map> input in Mule datamapper

I have been trying to map a List into an XML with lastest Mule Datamapper (3.5.1). Problem I met is:

Given this List essentially is a resultset from DB query, so every Map inside this List has same amount of k:v pairs. And one of them is called "Contact_Name", which could be either a String value or an empty String, mapped into xml side as <contactName>JohnDoe</contactName>

Could someone guide me about how should I validate this "Contact_name" and if it's an empty string then make sure in the xml side I won't have an empty node like <contactName/> ?

The xpath towards java map seems tricky and there is lack of such documentations from Mule.

edit: could anyone advise if rules or mapping conditions help? Especially the condition in the mapping structure editor, I couldnt find any doc explaining what syntax should I use there.

Thanks all

Upvotes: 0

Views: 566

Answers (1)

Ryan Carter
Ryan Carter

Reputation: 11606

If you use the 'script' view in the data mapper viewer, you can use expressions to check if the input argument is null or empty. Fore example:

if(input.Contact_Name != null) output.contactname = input.Contact_Name

Upvotes: 2

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