The Composite pattern is a very powerful design pattern that you use regularly to manipulate a group of things through the very same interface than a single thing. By doing so you don’t have to discriminate between the singular and plural cases, which often simplifies your design. Yet there are cases where you are tempted [...]
In the first part of this article we introduced predicates, which bring some of the benefits of functional programming to object-oriented languages such as Java, through a simple interface with one single method that returns true or false. In this second and last part, we’ll cover some more advanced notions to get the best out [...]
You keep hearing about functional programming that is going to take over the world, and you are still stuck to plain Java? Fear not, since you can already add a touch of functional style into your daily Java. In addition, it’s fun, saves you many lines of code and leads to fewer bugs. What is [...]
Patterns for using custom annotations
juil 12th, 2010
If you happen to create your own annotations, for instance to use with Java 6 Pluggable Annotation Processors, here are some patterns that I collected over time. Nothing new, nothing fancy, just putting everything into one place, with some proposed names.
Big battles are won on small details
déc 17th, 2009
Small details matter because you deal with them often. Any enhancement you make thus yields a benefit often, hence a bigger overall benefit. In other words: invest small care, get big return. This is an irresistible proposal! Examples of small design-level details that I care about because I have experienced great payback from them: Using [...]
Group together things that go together
oct 19th, 2005
Information hiding is one of the very essential principles of object orientation. If you dont know it well, I suggest you take a look at it on the Web, e-g at UncleBob. But information hiding is much more than just putting data private through accessors to protect them, it is especially a great tool to [...]
Disposable code generation works great !
mar 29th, 2005
In a recent project I was asked to parse massive XML document from a third party provider. We had two problems: the xml document definition was very massive, with about 120 groups of different elements, leading to a total of around 1500 different elements to parse into java objects. The other problem was that our [...]
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All original material of whatever nature created by Cyrille Martraire and included in this weblog and any related page, including the weblog's archive, is licensed under a Creative Commons License.
