private Set<TypeElement> processDelegateMethods() {
    Set<Element> delegateMethods = (Set) getElements(QueryDelegate.class);
    Set<TypeElement> typeElements = new HashSet<TypeElement>();

    for (Element delegateMethod : delegateMethods) {
      ExecutableElement method = (ExecutableElement) delegateMethod;
      Element element = delegateMethod.getEnclosingElement();
      String name = method.getSimpleName().toString();
      Type delegateType = typeFactory.getType(element.asType(), true);
      Type returnType = typeFactory.getType(method.getReturnType(), true);
      List<Parameter> parameters = elementHandler.transformParams(method.getParameters());
      // remove first element
      parameters = parameters.subList(1, parameters.size());

      EntityType entityType = null;
      for (AnnotationMirror annotation : delegateMethod.getAnnotationMirrors()) {
        if (TypeUtils.isAnnotationMirrorOfType(annotation, QueryDelegate.class)) {
          TypeMirror type = TypeUtils.getAnnotationValueAsTypeMirror(annotation, "value");
          if (type != null) {
            entityType = typeFactory.getEntityType(type, true);
          }
        }
      }

      if (entityType != null) {
        registerTypeElement(entityType.getFullName(), (TypeElement) element);
        entityType.addDelegate(
            new Delegate(entityType, delegateType, name, parameters, returnType));
        TypeElement typeElement =
            processingEnv.getElementUtils().getTypeElement(entityType.getFullName());
        boolean isAnnotated = false;
        for (Class<? extends Annotation> ann : conf.getEntityAnnotations()) {
          if (typeElement.getAnnotation(ann) != null) {
            isAnnotated = true;
          }
        }
        if (isAnnotated) {
          // handle also properties of entity type
          typeElements.add(
              processingEnv.getElementUtils().getTypeElement(entityType.getFullName()));
        } else {
          // skip handling properties
          context.extensionTypes.put(entityType.getFullName(), entityType);
          context.allTypes.put(entityType.getFullName(), entityType);
        }
      }
    }

    return typeElements;
  }