public boolean hasNext()

in tobago-core/src/main/java/org/apache/myfaces/tobago/internal/util/SelectItemUtils.java [108:201]
80 lines of code
22 McCabe index (conditional complexity)

    public boolean hasNext() {
      if (nextItem != null) {
        return true;
      }
      if (nestedItems != null) {
        if (nestedItems.hasNext()) {
          return true;
        }
        nestedItems = null;
      }

      UIComponent child = null;
      while (children.hasNext()) {
        final UIComponent c = children.next();
        // When there is other components nested that does
        // not extends from UISelectItem or UISelectItems
        // the behavior for this iterator is just skip this
        // element(s) until an element that extends from these
        // classes are found. If there is no more elements
        // that conform this condition, just return false.
        if (c instanceof UISelectItem || c instanceof UISelectItems) {
          child = c;
          break;
        }
      }
      if (child == null) {
        return false;
      }

      if (child instanceof UISelectItem) {
        final UISelectItem uiSelectItem = (UISelectItem) child;
        Object item = uiSelectItem.getValue();
        if (item == null) {
          // no value attribute --> create the SelectItem out of the other attributes
          final Object itemValue = uiSelectItem.getItemValue();
          String label = uiSelectItem.getItemLabel();
          final String description = uiSelectItem.getItemDescription();
          final boolean disabled = uiSelectItem.isItemDisabled();
//          boolean escape = uiSelectItem.isItemEscaped();
          boolean noSelectionOption = uiSelectItem.isNoSelectionOption();
          if (label == null && itemValue != null) {
            label = itemValue.toString();
          }
          String image = null;
          Markup markup = null;
          if (uiSelectItem instanceof org.apache.myfaces.tobago.component.UISelectItem) {
            final org.apache.myfaces.tobago.component.UISelectItem tobagoSelectItem
                = (org.apache.myfaces.tobago.component.UISelectItem) uiSelectItem;
            image = tobagoSelectItem.getItemImage();
            markup = tobagoSelectItem.getMarkup();
          }
          item = new org.apache.myfaces.tobago.model.SelectItem(itemValue, label, description, disabled,
              true, noSelectionOption, image, markup);
        } else if (!(item instanceof SelectItem)) {
          final ValueExpression expression = uiSelectItem.getValueExpression("value");
          throw new IllegalArgumentException("ValueExpression '"
              + (expression == null ? null : expression.getExpressionString()) + "' of UISelectItem : "
              + child + " does not reference an Object of type SelectItem");
        }
        nextItem = (SelectItem) item;
        return true;
      } else { // UISelectItems
        currentUISelectItems = (UISelectItems) child;
        final Object value = currentUISelectItems.getValue();

        if (value instanceof SelectItem) {
          nextItem = (SelectItem) value;
          return true;
        } else if (value != null && value.getClass().isArray()) {
          // value is any kind of array (primitive or non-primitive)
          // --> we have to use class Array to get the values
          final int length = Array.getLength(value);
          final Collection<Object> items = new ArrayList<>(length);
          for (int i = 0; i < length; i++) {
            items.add(Array.get(value, i));
          }
          nestedItems = items.iterator();
          return hasNext();
        } else if (value instanceof Iterable) {
          // value is Iterable --> Collection, DataModel,...
          nestedItems = ((Iterable<?>) value).iterator();
          return hasNext();
        } else if (value instanceof Map) {
          final Map<Object, Object> map = (Map<Object, Object>) value;
          final Collection<SelectItem> items = new ArrayList<>(map.size());
          for (final Map.Entry<Object, Object> entry : map.entrySet()) {
            items.add(new org.apache.myfaces.tobago.model.SelectItem(entry.getValue(), entry.getKey().toString()));
          }
          nestedItems = items.iterator();
          return hasNext();
        }
      }
      return false;
    }