Welcome to my blog
As I see it the repository pattern have two purposes; first it is an abstraction of the data layer and second it is a way of centralising the handling of the domain objects. Data Access Objects I still think this is one of the more common ways to work with the data layer. I personal have countless …
Continue reading “Design Pattern – Repository Design Pattern”
Observer pattern is used when there is one-to-many relationship between objects such as if one object is modified, its depenedent objects are to be notified automatically. Observer pattern falls under behavioral pattern category. Subject.java import java.util.ArrayList; import java.util.List; public class Subject { private List<Observer> observers = new ArrayList<Observer>(); private int state; public int getState() { …