Develop the Data-Base-Access (DBA) Object for the table 'Project' - Fat-Client-Development

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Last revision of this document:
2006-08-25

Data-Base-Access (DBA) Objects are classes that perform database-operations for exactly one database-table.

For the theory about DBA Objects please consult Using Data-Base-Access (DBA) Objects for low level access to database-tables.

`Preface:`

If you are came to this document to get a guideline for developing a Data-Base-Access Object, I recommend to start with the document Using Data-Base-Access (DBA) Objects for low level access to database-tables and go directly to the ToDo-List in this document.

As classes for Data-Base-Access Objects have a critical mission within an application, preference was given to performance if there has to be made a decision between understandability and performance. I hope, that the comments placed in the code will help you to understand what intention is behind the code.

`Credits:`

Too numerous to mention; the idea is available in dozens of versions – I refined a lot of ideas into my system.

Prerequisites:

This step requieres to have the base-classes imported (see Download the jar-file for the base-classes) or written by yourself as guided by the tutorial to develop a Fat-Client application in Java.

`Create the Data-Base-Access (DBA) Object for the database-table 'Project':`

To create the class for the Data-Base-Access Object, right click onto the project 'JS_FC01' and select >New>Class
Enter the Package (js_errdb.dba), the (Class-)Name (JS_ErrDB_Project_DBA), enter or 'Browse' the Superclass (JSBS_DBA) and check that no checkbox is selected; then click the [Finish] button.

Eclipse has already generated a template and the individual code can be entered. Please see the code to be entered at JS_ErrDB_Project_DBA - or copy it from there ;-) .

top.

`Next Steps:`

As the base for the Server-Side derivation of the Business Object is finished now, coding of it follows: JS_FC01o - Develop the Server-Side Class for the Business Object 'Project'.