コード例 #1
0
 /**
  * Sorts the elements according to their order:
  *
  * <ol>
  *   <li>If an {@link Order} annotation is present, its {@link Order#value()} is used
  *   <li>If a {@link Replace} annotation is present, the superclass' order is used
  *   <li>If the object implements {@link IOrdered}, {@link IOrdered#getOrder()} is used
  *   <li>Finally, the index in the original collection is used
  * </ol>
  *
  * @since 3.8.1
  */
 public static <T> Collection<T> sortByOrder(Collection<T> list) {
   if (list == null) {
     return null;
   }
   TreeMap<CompositeObject, T> sortMap = new TreeMap<CompositeObject, T>();
   int index = 0;
   for (T element : list) {
     Class<?> c = element.getClass();
     double order;
     Order orderAnnotation;
     while ((orderAnnotation = c.getAnnotation(Order.class)) == null
         && c.isAnnotationPresent(Replace.class)) {
       c = c.getSuperclass();
     }
     if (orderAnnotation != null) {
       order = orderAnnotation.value();
     } else if (element instanceof IOrdered) {
       order = ((IOrdered) element).getOrder();
     } else {
       order = (double) index;
     }
     sortMap.put(new CompositeObject(order, index), element);
     index++;
   }
   return sortMap.values();
 }
コード例 #2
0
 /**
  * Filters the given class array and sorts the remaining elements according to their {@link Order}
  * annotation.
  *
  * <p>By default, the method throws an {@link IllegalArgumentException} if one of the remaining
  * classes is not annotated by {@link Order}. The behavior can be switched off by setting the
  * system property <code>bsi.debug.innerclass.order</code> to an arbitrary value.
  *
  * @param classes
  * @param filter
  * @return
  * @throws IllegalArgumentException
  */
 @SuppressWarnings("unchecked")
 public static <T> Class<T>[] sortFilteredClassesByOrderAnnotation(
     Class[] classes, Class<T> filter) {
   TreeMap<CompositeObject, Class> orderedClassesMap = new TreeMap<CompositeObject, Class>();
   for (int i = 0; i < classes.length; i++) {
     if (filter.isAssignableFrom(classes[i])) {
       if (classes[i].isAnnotationPresent(Order.class)) {
         Order order = (Order) classes[i].getAnnotation(Order.class);
         orderedClassesMap.put(new CompositeObject(order.value(), i), classes[i]);
       } else {
         if (!classes[i].isAnnotationPresent(Replace.class)) {
           LOG.error("missing @Order annotation: " + classes[i].getName());
         }
         orderedClassesMap.put(new CompositeObject(Double.MAX_VALUE, i), classes[i]);
       }
     }
   }
   return orderedClassesMap.values().toArray(new Class[orderedClassesMap.size()]);
 }