Recommenders/ExtensionFactory

The ExtensionFactory class can be found in bundle org.eclipse.recommenders.commons.injection. The ExtensionFactory is used to automatically invoke dependency injection on classes defined as extensions. In concrete, the ExtensionFactory instantiates the extension using guice for dependency injection. This enables you to use @Inject annotations on your fields or on the constructor.

Let's look at an example:

public class MyView extends ViewPart {

   @Inject
   private Service service;

   @Inject
   public MyView(ConfigurationObject configuration) {

...  

As you can see the improvement is that you can define needed objects in the constructor, because you don't rely on a default constructor anymore and you completely hide the code requesting injection on your fields.