Adding functionality to Pentaho BI Server

Hello friends,

New to Pentaho here. I have Pentaho BI Server installed. I have developed some slick reports, and I have a legacy Java app that lets a user add data to a database table to include in the reports.

Problem is - I want to authenticate the user through Pentaho and add a link to use this data upload facility, or use Pentaho on the web to allow the user to upload data to this table.

Any views on how this should be best accomplished?