Is it mandatory to use Business object for data transfer and work flow?

<pre>
In our enterprise projects we deal with some screens where we add or update some data and again
we retrieve that data and display to user in various ways like displaying on screen as
a report or viewing in excel etc.. Most of the times, though we identify the business objects
based on the nouns in requirements document, really while implementing there will not be any
business logic in the objects. Almost all the objects which we identfy as business objects
may have methods like add, delete, update and retrieve methods. Still in these cases, is it required to
have business objects or can we use transfer object to send the data for saving and retriving or any other
pattern/guideline is there for dealing such cases?
I really appreciate your comments on this topic.
Also I apologize ahead of time if my explanation is not clear to you.
</pre>


Thanks in advance.

Regards,

Rizwan.

In my opinion, DAO pattern would be suitable for you. Generally the DAO (Data Access Object) will have the CRUD (create, read, update, delete) methods to retrieve data from data-source (e.g. database). Based on the data it will create the DTOs (Data Transfer Objects) and pass them to the caller. It will also receive the DTOs from the caller and save it the data-source. Thus in your case you can
- remove the CRUD methods from the Business Objects (BO) and make them pure DTOs and use them with DAOs (If you are using JDBC codes inside your application and you don't have much of validation or processing logic in your BOs).
http://www.corej2eepatterns.com/Patterns2ndEd/DataAccessObject.htm
OR
- use BOs in combination in DAOs (if using the database connection from a pool and BOs are having complicated processing logic).
http://www.corej2eepatterns.com/Patterns2ndEd/BusinessObject.htm

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Message was edited by:
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