Class Index

Evo Class Index is much quicker alternative to every run-time annotation scanning library like Reflections or Scannotations.

Evo Class Index is an annotation processor which at compile-time generates an index of classes implementing given interface, classes annotated by given annotation or placed in a common package.

Java 6 will automatically discover the processor from the classpath. Download evo-classindex jar file (also requires Guava) or simply put the following dependency in Maven POM file:

	org.atteo
	evo-classindex
	1.0

There are two annotations which trigger the indexing:

• @IndexSubclasses when placed on interface makes an index of all classes implementing the interface, when placed on class makes an index of its subclasses and finally when placed in package-info.java it creates an index of all classes in that package.
• @IndexAnnotated when placed on an annotation makes an index of all classes marked with that annotation.

To access the index at run-time use static methods of ClassIndex class.

      @IndexAnnotated
      public @interface Entity {
      }

      @Entity
      public class Car {
      }

      ...

      for (Class<?> klass : ClassIndex.getAnnotated(Entity.class)) {
          System.out.println(klass.getName());
      }