+ public static <T> @Nullable T checkFieldCast(final @NonNull Class<T> requiredClass, final @NonNull String fieldName,
+ final @Nullable Object obj) {
+ try {
+ return requiredClass.cast(obj);
+ } catch (ClassCastException e) {
+ throw new IllegalArgumentException("Invalid input value for property \"" + fieldName + "\"", e);
+ }
+ }
+
+ /**
+ * Utility method for checking whether the items of target list is compatible.
+ *
+ * @param requiredClass Required item class
+ * @param fieldName name of the field being filled
+ * @param list List, which items should be checked
+ * @return Type-checked List
+ * @throws IllegalArgumentException if a list item is not instance of {@code requiredClass}
+ * @throws NullPointerException if {@code requiredClass} or {@code fieldName} is {@code null}
+ */
+ @SuppressWarnings("unchecked")
+ public static <T> @Nullable List<T> checkListFieldCast(final @NonNull Class<?> requiredClass,
+ final @NonNull String fieldName, final @Nullable List<?> list) {
+ DoNotLeakSpotbugs.checkCollectionField(requiredClass, fieldName, list);
+ return (List<T>) list;
+ }
+
+ /**
+ * Utility method for checking whether the items of target set is compatible.
+ *
+ * @param requiredClass Required item class
+ * @param fieldName name of the field being filled
+ * @param set Set, which items should be checked
+ * @return Type-checked Set
+ * @throws IllegalArgumentException if a set item is not instance of {@code requiredItemClass}
+ * @throws NullPointerException if {@code requiredClass} or {@code fieldName} is {@code null}
+ */
+ @SuppressWarnings("unchecked")
+ public static <T> @Nullable Set<T> checkSetFieldCast(final @NonNull Class<?> requiredClass,
+ final @NonNull String fieldName, final @Nullable Set<?> set) {
+ DoNotLeakSpotbugs.checkCollectionField(requiredClass, fieldName, set);
+ return (Set<T>) set;