private Set<TypeElement> getTypeFromProperties(Set<TypeElement> parents) {
    Set<TypeElement> elements = new HashSet<TypeElement>();
    for (Element element : parents) {
      if (element instanceof TypeElement) {
        processFromProperties((TypeElement) element, elements);
      }
    }

    Iterator<TypeElement> iterator = elements.iterator();
    while (iterator.hasNext()) {
      TypeElement element = iterator.next();
      String name = element.getQualifiedName().toString();
      if (name.startsWith("java.") || name.startsWith("org.joda.time.")) {
        iterator.remove();
      } else {
        boolean annotated = false;
        for (Class<? extends Annotation> annotation : conf.getEntityAnnotations()) {
          annotated |= element.getAnnotation(annotation) != null;
        }
        if (annotated) {
          iterator.remove();
        }
      }
    }

    return elements;
  }
  private void handleEmbeddedType(Element element, Set<TypeElement> elements) {
    TypeMirror type = element.asType();
    if (element.getKind() == ElementKind.METHOD) {
      type = ((ExecutableElement) element).getReturnType();
    }
    String typeName = type.toString();

    if (typeName.startsWith(Collection.class.getName())
        || typeName.startsWith(List.class.getName())
        || typeName.startsWith(Set.class.getName())) {
      type = ((DeclaredType) type).getTypeArguments().get(0);

    } else if (typeName.startsWith(Map.class.getName())) {
      type = ((DeclaredType) type).getTypeArguments().get(1);
    }

    TypeElement typeElement = typeExtractor.visit(type);

    if (typeElement != null
        && !TypeUtils.hasAnnotationOfType(typeElement, conf.getEntityAnnotations())) {
      if (!typeElement.getQualifiedName().toString().startsWith("java.")) {
        elements.add(typeElement);
      }
    }
  }
  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;
  }
  @Override
  public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
    TYPES = processingEnv.getTypeUtils();
    ELEMENTS = processingEnv.getElementUtils();

    processingEnv
        .getMessager()
        .printMessage(Diagnostic.Kind.NOTE, "Running " + getClass().getSimpleName());

    if (roundEnv.processingOver() || annotations.size() == 0) {
      return ALLOW_OTHER_PROCESSORS_TO_CLAIM_ANNOTATIONS;
    }

    if (roundEnv.getRootElements() == null || roundEnv.getRootElements().isEmpty()) {
      processingEnv.getMessager().printMessage(Diagnostic.Kind.NOTE, "No sources to process");
      return ALLOW_OTHER_PROCESSORS_TO_CLAIM_ANNOTATIONS;
    }

    conf = createConfiguration(roundEnv);
    context = new Context();
    Set<Class<? extends Annotation>> entityAnnotations = conf.getEntityAnnotations();
    TypeMappings typeMappings = conf.getTypeMappings();
    QueryTypeFactory queryTypeFactory = conf.getQueryTypeFactory();
    this.typeFactory =
        new ExtendedTypeFactory(
            processingEnv, conf, entityAnnotations, typeMappings, queryTypeFactory);
    elementHandler = new TypeElementHandler(conf, typeFactory, typeMappings, queryTypeFactory);
    this.roundEnv = roundEnv;

    // process annotations
    processAnnotations();

    validateMetaTypes();

    // serialize created types
    serializeMetaTypes();

    return ALLOW_OTHER_PROCESSORS_TO_CLAIM_ANNOTATIONS;
  }
 private Set<TypeElement> getAnnotationlessSupertypes(Set<TypeElement> elements) {
   Set<TypeElement> rv = new HashSet<TypeElement>();
   for (TypeElement element : elements) {
     TypeMirror superTypeMirror = element.getSuperclass();
     while (superTypeMirror != null) {
       TypeElement superTypeElement =
           (TypeElement) processingEnv.getTypeUtils().asElement(superTypeMirror);
       if (superTypeElement != null
           && !superTypeElement.toString().startsWith("java.lang.")
           && !TypeUtils.hasAnnotationOfType(superTypeElement, conf.getEntityAnnotations())) {
         rv.add(superTypeElement);
         superTypeMirror = superTypeElement.getSuperclass();
         if (superTypeMirror instanceof NoType) {
           superTypeMirror = null;
         }
       } else {
         superTypeMirror = null;
       }
     }
   }
   return rv;
 }
  protected Set<TypeElement> collectElements() {
    Set<TypeElement> elements = new HashSet<TypeElement>();

    // from delegate methods
    elements.addAll(processDelegateMethods());

    // from class annotations
    for (Class<? extends Annotation> annotation : conf.getEntityAnnotations()) {
      for (Element element : getElements(annotation)) {
        if (element instanceof TypeElement) {
          elements.add((TypeElement) element);
        }
      }
    }

    // from package annotations
    if (conf.getEntitiesAnnotation() != null) {
      for (Element element : getElements(conf.getEntitiesAnnotation())) {
        AnnotationMirror mirror =
            TypeUtils.getAnnotationMirrorOfType(element, conf.getEntitiesAnnotation());
        elements.addAll(TypeUtils.getAnnotationValuesAsElements(mirror, "value"));
      }
    }

    // from embedded annotations
    if (conf.getEmbeddedAnnotation() != null) {
      elements.addAll(getEmbeddedTypes());
    }

    // from embedded
    if (conf.isUnknownAsEmbedded()) {
      elements.addAll(getTypeFromProperties(elements));
    }

    // from annotation less supertypes
    elements.addAll(getAnnotationlessSupertypes(elements));

    // register possible embedded types of non-tracked supertypes
    if (conf.getEmbeddedAnnotation() != null) {
      Class<? extends Annotation> embedded = conf.getEmbeddedAnnotation();
      Set<TypeElement> embeddedElements = new HashSet<TypeElement>();
      for (TypeElement element : elements) {
        TypeMirror superTypeMirror = element.getSuperclass();
        while (superTypeMirror != null) {
          TypeElement superTypeElement =
              (TypeElement) processingEnv.getTypeUtils().asElement(superTypeMirror);
          if (superTypeElement != null) {
            List<? extends Element> enclosed = superTypeElement.getEnclosedElements();
            for (Element child : enclosed) {
              if (child.getAnnotation(embedded) != null) {
                handleEmbeddedType(child, embeddedElements);
              }
            }
            superTypeMirror = superTypeElement.getSuperclass();
            if (superTypeMirror instanceof NoType) {
              superTypeMirror = null;
            }
          } else {
            superTypeMirror = null;
          }
        }
      }

      // register found elements
      for (TypeElement element : embeddedElements) {
        if (!elements.contains(element)) {
          elementHandler.handleEntityType(element);
        }
      }
    }

    return elements;
  }