public SelectItem next()

in tobago-core/src/main/java/org/apache/myfaces/tobago/internal/util/SelectItemUtils.java [203:284]
61 lines of code
14 McCabe index (conditional complexity)

    public SelectItem next() {
      if (!hasNext()) {
        throw new NoSuchElementException();
      }
      if (nextItem != null) {
        final SelectItem value = nextItem;
        nextItem = null;
        return value;
      }
      if (nestedItems != null) {
        Object item = nestedItems.next();

        if (!(item instanceof SelectItem)) {
          // check new params of SelectItems (since 2.0): itemValue, itemLabel, itemDescription,...
          // Note that according to the spec UISelectItems does not provide Getter and Setter
          // methods for this values, so we have to use the attribute map
          final Map<String, Object> attributeMap = currentUISelectItems.getAttributes();

          // write the current item into the request map under the key listed in var, if available
          boolean wroteRequestMapVarValue = false;
          Object oldRequestMapVarValue = null;
          final String var = ComponentUtils.getStringAttribute(currentUISelectItems, Attributes.var);
          if (var != null && !"".equals(var)) {
            // save the current value of the key listed in var from the request map
            oldRequestMapVarValue = facesContext.getExternalContext().getRequestMap().put(var, item);
            wroteRequestMapVarValue = true;
          }

          // check the itemValue attribute
          Object itemValue = ComponentUtils.getAttribute(currentUISelectItems, Attributes.itemValue);
          if (itemValue == null) {
            // the itemValue attribute was not provided
            // --> use the current item as the itemValue
            itemValue = item;
          }

          // Spec: When iterating over the select items, toString()
          // must be called on the string rendered attribute values
          final Object itemLabelObject = ComponentUtils.getAttribute(currentUISelectItems, Attributes.itemLabel);
          final String itemLabel;
          if (itemLabelObject != null) {
            itemLabel = itemLabelObject.toString();
          } else if (itemValue != null) {
            itemLabel = itemValue.toString();
          } else {
            LOG.warn("Label string can't be created!");
            itemLabel = "???";
          }
          Object itemDescription = ComponentUtils.getAttribute(currentUISelectItems, Attributes.itemDescription);
          if (itemDescription != null) {
            itemDescription = itemDescription.toString();
          }
          final boolean itemDisabled
              = ComponentUtils.getBooleanAttribute(currentUISelectItems, Attributes.itemDisabled, false);
          final String itemImage = ComponentUtils.getStringAttribute(currentUISelectItems, Attributes.itemImage);
          final Markup markup;
          if (currentUISelectItems instanceof Visual) {
            markup = ((Visual) currentUISelectItems).getMarkup();
          } else {
            markup = Markup.NULL;
          }
// TBD: should this be possible?
//        Boolean itemLabelEscaped = getBooleanAttribute(currentUISelectItems, ITEM_LABEL_ESCAPED_PROP, true);
// TBD ?
//        Object noSelectionValue = attributeMap.get(NO_SELECTION_VALUE_PROP);
          item = new org.apache.myfaces.tobago.model.SelectItem(
              itemValue, itemLabel, (String) itemDescription, itemDisabled, itemImage, markup);

          // remove the value with the key from var from the request map, if previously written
          if (wroteRequestMapVarValue) {
            // If there was a previous value stored with the key from var in the request map, restore it
            if (oldRequestMapVarValue != null) {
              facesContext.getExternalContext().getRequestMap().put(var, oldRequestMapVarValue);
            } else {
              facesContext.getExternalContext().getRequestMap().remove(var);
            }
          }
        }
        return (SelectItem) item;
      }
      throw new NoSuchElementException();
    }