Questions about passing data to SSRS

Hello,

I am creating a report via Reporting services and want to ask these questions:

1. Is there a way to pass and parse JSON data to an RDL file? Currently we are using SQL Server 2014 Reporting Services.
2. Can I open and read XML files via custom code in the Report? (Not through datasource)
   
3. Assuming I have XML data as datasource in Reporting Services with below sample format. Is there a way that Reporting Service will be able to iterate through <MainHolder> and <item> nodes?
   

<PersonalInfo><MainHolder><item>...</item><item>...</item><item>...</item></MainHolder><MainHolder><item>...</item></MainHolder></PersonalInfo>