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maxg13 posted on Mon, Jun 25 2012 3:06 PM

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I would like to implement Factory Pattern in CSLA. I can use an abstract base class or an interface for the abstraction. I have decided to use an abstract class, only because I have certain common functionality such as, saving to store, retrieving from store, and deletion of the record. Also, some properties that would apply to all implemented objects.

C# only allows for inheritance from one class, so I can either use BusinessBase or the abstract class. I would also like the concrete types to have their own set of business rules. How can this be done with CSLA?

If I do what I have listed below, will the rules in both the abstract class as well as the concrete class get fired?

Some code ...

Abstract class:

public class Form : BusinessBase<Form> {

   private static PropertyInfo<string> FormNameProperty = RegisterProperty<string>(c => c.FormName);

   public string FormName

   {

      get { return GetProperty(FormNameProperty); }

   }

   public abstract void LoadContent();

   protected override void AddBusinessRules()

   {

      // business rules that are commmon for all implementations

   }

}

Concrete implementation:

public class FormA : Form {

   private static PropertyInfo<string> FirstNameProperty = RegisterProperty<string>(c => c.FirstName);

   public string FirstName

   {

      get { return GetProperty(FirstNameProperty); }

   }

   public override void LoadContent(){

      // some custom code

   }

   protected override void AddBusinessRules()

   {

      // business rules that only apply to this class

   }

}

Factory:

public static class FormFactory{

   public static Form GetForm(string formanmae) {

      Type formType = GetFormType(formName);

      if(formType == null)

         return null;

      var form = Activator.CreateInstance(formType) as ReferralForm;

         return form;

   }

}