Question

I have an application which has legacy Struts actions extending org.apache.struts.StrutsActions. I would like to be sure that all my classes which are extending StrutsActions have a custom annotation.

In order to provide this I have written a small maven enforcer rule to validate my requirement. However I dont know how to load my classes at my mojo to validate them.

Actually I have done something not fancy which is injection outputDirectory and with a custom class loader I have recursively loaded all classes at my build folder.

Thanks

Answer 1

I have done it with the help of reflections

  <dependency>
     <groupId>org.reflections</groupId>
     <artifactId>reflections</artifactId>
     <version>0.9.5</version>
  </dependency>

my implementation is like this:

public void execute(EnforcerRuleHelper helper) throws EnforcerRuleException {

    URL url = getURL(helper.evaluate("${project.build.outputDirectory}"));

    Predicate<String> filter = new FilterBuilder().include(getTargetSuperTypeForSubtypes());
    Predicate<String> filter2 = new FilterBuilder().include(getMustHaveAnnotation());

    Reflections reflections = new Reflections(new ConfigurationBuilder()
     .setScanners(
        new TypeAnnotationsScanner().filterResultsBy(filter2),
        new SubTypesScanner().filterResultsBy(filter))
     .setUrls(url));

    validate(reflections);
}