Cross - X Architecture

The GUI Tier is the interface or the front end and is used to generate events that trigger the file manipulation logic in the business tier. The GUI Tier consists of the Form Objects i.e. the components of the front end such as the buttons, trees, tables, etc and the Form Actions that carries the events triggered in the form objects to the business tier to make the appropriate file manipulation

 The Business Tier consists of all the logic for internal file manipulation, management and connection establishment etc. The  Business tier consists of two components namely the Business Delegate Factory and the Business Delegate Objects. The Business Delegate objects implements the entire logic needed for various file manipulations performed. The purpose of the Business Delegate Factory is to avoid the direct usage or access of the Logic Objects by the front end objects i.e. to prevent the reflection due to change. In other words the Business delegate factory acts as an interface between the  GUI Tier and the Business Logic.

 The Integration Tier is used for the transmission of the data i.e., file information form one system to the other in the form of XML (Extensible Markup Language) data. The Integration tier consists of three components namely the Unicast Objects, DAO Factory and the DAO Objects. The Unicast Objects is used to access the file system of the local client. The DAO ( Data Access Objects)  Objects is used to access the file information of remote machines may be the same platform as the local machine or else in a different platform. The purpose of the DAO Factory is the same as that of the Business Delegate factory in the Business Tier i.e. avoids direct access of file objects by the Business delegate objects