Model example?

[evergrean100]

I am trying to make sure I know what exactly is meant by the Model part of MVC design pattern.

Model is where you have the Business rules. For example if I had a Form in the Presentation part (JSP) that had a Field entry called Street and I only wanted the user to be able to enter one of three Streets then I could create a validation condition in my Model Bean Java class:

public mymethod()
{
if((Street.equals("StreetOne")  ||  (Street.equals("StreetTwo")) || (Street.equals("StreetThree"))  {
      //good selection 
}
else
{
      //invalid selection
}
}

mymethod() would be called in the Servlet Controller.
Would this be a good example of Model code and/or Business logic that would be located in a Java Bean?

 

[stefanwagner]

The model is the data.
String street - or an ArrayList of Strings, or an adress, containing a street, or a list of adresses.

Instead of a list an array might be used, or a stack...

In Swing I would show a JComboBox to reflect a selection - for jsp there are similar things I guess - the J2EE-Forum is for JSP-related questions.

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