Lotushints

In part 10 of Design pattern series we will take look at Builder design pattern. Albeit much similarity, this pattern it is not to be mistaken with Abstract factory pattern. As Abstract Factory emphasizes a family of products and returns the product immediately, Builder focuses on constructing complex object step by step, returning product in [...]

This week, I present to you not much used, but quite useful Mediator pattern. Mediator pattern provides a unified interface to set of interfaces in a subsystem. Or, to simplify… Mediator pattern is mediator for communication between several classes.

State pattern is probably most used in review cycles. The definition says: State pattern allows an object to appear as it can change its class by altering its behaviour and state. What are you talking about? Well, imagine you are in need to build a bug tracking database.  Bug reports in basics have four states. [...]

When I was assigned to rebuild company’s web site for the second time in 7 or 8 years, I have decided that it is probably the time to implement some modularity to the database. First in line were sidebars. Why? Well, despite “awesome” notes rich text to HTML rendering, web content was always contained in [...]

Have you ever wondered how you could call already written and quite useful Java classes in your LotusScript code? To me, this moment was, when I was trying to implement other department’s code into my own. Unfortunately I wasn’t skilled enough in ways of object development, LS2J  and googling back then to actually figure out [...]

In this article, I would like to present you a design pattern that is not so common, but for sure, I wish, that in the past I would have used it. It would certainly make my life much easier. So, what is this Template method pattern all about? The Template Method Pattern defines the skeleton [...]

One of the most used patterns is also a pattern that hears by the name Observer. What does it do? Well, imagine you have a stock portfolio and you need to notify your investors every time the value of their stock changes. First, your investors need to subscribe to the stock they would like to [...]

In my years of developing software, I come to realize that what every software development department needs is: some sort of IDE with a compiler version control and bug tracking. Usually you get stuck with IDE with a compiler. Everything else is up to you. But how are things in Lotus Notes?

I have found an interesting challenge last week. For some reason, I had to have a document on web that would show a computed table of products and there would be some content before and after. The trick however is, that we use some sort of CRM database for our web content and documents use [...]

Factory method pattern definition: The Factory method pattern defines an interface for creating and objects, but lets subclasses to decide which class they will create. Huh? I will try to present this pattern on a simple example. Imagine you work in a company that sales software. However, this software is, due to different laws, different [...]