topic Re: implement DAO pattern in Application Development and Automation Discussions

implement DAO pattern

mmgc_riel — Mon, 15 Feb 2010 11:22:29 GMT

In my application I have some database tables with a persistency class. Some other objects are implemented by calling the service bus, some others are implemented by function modules.

I want that the developer doesn't need to know where the object is coming from.

Therefore I want to implement the DAO pattern (Data Access Object).

I'm new on abap objects, so can somebody give me a working example or blog, or guidelines how to code this pattern?

Re: implement DAO pattern

Former Member — Mon, 15 Feb 2010 21:48:16 GMT

I don't have an coded example here, but isn't it sufficient for this pattern to build an interface with some get- and set-methods? This interface can be implemented by several classes with different data retrieval logic. Then a static factory-method could do the job to decide during runtime which actual class is instantiated, returning the interface.

Re: implement DAO pattern

mmgc_riel — Tue, 16 Feb 2010 07:37:23 GMT

I created a few class like you described and it works.

Now i'm going to implement the factory class.

Thanks