/**
* Initializes the <code>items</code> instance variable with an <code>Iterator</code> appropriate
* to the UISelectItem(s) value.
*/
private void initializeItems() {
UIComponent kid = (UIComponent) findNextValidChild();
if (kid instanceof UISelectItem) {
UISelectItem ui = (UISelectItem) kid;
SelectItem item = (SelectItem) ui.getValue();
if (item == null) {
item =
new SelectItem(
ui.getItemValue(),
ui.getItemLabel(),
ui.getItemDescription(),
ui.isItemDisabled(),
ui.isItemEscaped(),
ui.isNoSelectionOption());
}
updateSingeItemIterator(item);
items = singleItemIterator;
} else if (kid instanceof UISelectItems) {
UISelectItems ui = (UISelectItems) kid;
Object value = ui.getValue();
if (value instanceof SelectItem) {
updateSingeItemIterator((SelectItem) value);
items = singleItemIterator;
} else if (value.getClass().isArray()) {
items = new ArrayIterator(ctx, (UISelectItems) kid, value);
} else if (value instanceof Iterable) {
items = new IterableItemIterator(ctx, (UISelectItems) kid, (Iterable<?>) value);
} else if (value instanceof Map) {
items = new MapIterator((Map) value);
} else {
throw new IllegalArgumentException();
}
}
}
protected List<SelectItem> getSelectItems(FacesContext context, UIInput component) {
List<SelectItem> selectItems = new ArrayList<SelectItem>();
for (UIComponent child : component.getChildren()) {
if (child instanceof UISelectItem) {
UISelectItem uiSelectItem = (UISelectItem) child;
Object selectItemValue = uiSelectItem.getValue();
if (selectItemValue == null) {
selectItems.add(
new SelectItem(
uiSelectItem.getItemValue(),
uiSelectItem.getItemLabel(),
uiSelectItem.getItemDescription(),
uiSelectItem.isItemDisabled(),
uiSelectItem.isItemEscaped(),
uiSelectItem.isNoSelectionOption()));
} else {
selectItems.add((SelectItem) selectItemValue);
}
} else if (child instanceof UISelectItems) {
UISelectItems uiSelectItems = ((UISelectItems) child);
Object value = uiSelectItems.getValue();
if (value != null) {
if (value instanceof SelectItem) {
selectItems.add((SelectItem) value);
} else if (value.getClass().isArray()) {
for (int i = 0; i < Array.getLength(value); i++) {
Object item = Array.get(value, i);
if (item instanceof SelectItem) selectItems.add((SelectItem) item);
else selectItems.add(createSelectItem(context, uiSelectItems, item));
}
} else if (value instanceof Map) {
Map map = (Map) value;
for (Iterator it = map.keySet().iterator(); it.hasNext(); ) {
Object key = it.next();
selectItems.add(
createSelectItem(context, uiSelectItems, String.valueOf(key), map.get(key)));
}
} else if (value instanceof Collection) {
Collection collection = (Collection) value;
for (Iterator it = collection.iterator(); it.hasNext(); ) {
Object item = it.next();
if (item instanceof SelectItem) selectItems.add((SelectItem) item);
else selectItems.add(createSelectItem(context, uiSelectItems, item));
}
}
}
}
}
return selectItems;
}
protected void addSelectItem(UISelectItem uiItem, List<SelectItem> items) {
boolean isRendered = uiItem.isRendered();
if (!isRendered) {
items.add(null);
return;
}
Object value = uiItem.getValue();
SelectItem item;
if (value instanceof SelectItem) {
item = (SelectItem) value;
} else {
Object itemValue = uiItem.getItemValue();
String itemLabel = uiItem.getItemLabel();
// JSF throws a null pointer exception for null values and labels,
// which is a serious problem at design-time.
item =
new SelectItem(
itemValue,
itemLabel == null ? "" : itemLabel,
uiItem.getItemDescription(),
uiItem.isItemDisabled());
}
items.add(item);
}
/**
* Return a List of {@link javax.faces.model.SelectItem} instances representing the available
* options for this component, assembled from the set of {@link
* javax.faces.component.UISelectItem} and/or {@link javax.faces.component.UISelectItems}
* components that are direct children of this component. If there are no such children, an empty
* <code>Iterator</code> is returned.
*
* @param context The {@link javax.faces.context.FacesContext} for the current request. If null,
* the UISelectItems behavior will not work.
* @param component the component
* @throws IllegalArgumentException if <code>context</code> is <code>null</code>
* @return a List of the select items for the specified component
*/
public static List<SelectItem> getSelectItems(FacesContext context, UIComponent component) {
if (context == null) {
throw new IllegalArgumentException(
MessageUtils.getExceptionMessageString(
MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "context"));
}
ArrayList<SelectItem> list = new ArrayList<SelectItem>();
for (UIComponent kid : component.getChildren()) {
if (kid instanceof UISelectItem) {
UISelectItem item = (UISelectItem) kid;
Object value = item.getValue();
if (value == null) {
list.add(
new SelectItem(
item.getItemValue(),
item.getItemLabel(),
item.getItemDescription(),
item.isItemDisabled(),
item.isItemEscaped()));
} else if (value instanceof SelectItem) {
list.add((SelectItem) value);
} else {
throw new IllegalArgumentException(
MessageUtils.getExceptionMessageString(
MessageUtils.VALUE_NOT_SELECT_ITEM_ID,
component.getId(),
value.getClass().getName()));
}
} else if (kid instanceof UISelectItems) {
Object value = ((UISelectItems) kid).getValue();
if (value instanceof SelectItem) {
list.add((SelectItem) value);
} else if (value instanceof SelectItem[]) {
SelectItem[] items = (SelectItem[]) value;
// we manually copy the elements so that the list is
// modifiable. Arrays.asList() returns a non-mutable
// list.
//noinspection ManualArrayToCollectionCopy
for (SelectItem item : items) {
list.add(item);
}
} else if (value instanceof Collection) {
for (Object element : ((Collection) value)) {
if (SelectItem.class.isInstance(element)) {
list.add((SelectItem) element);
} else {
throw new IllegalArgumentException(
MessageUtils.getExceptionMessageString(
MessageUtils.VALUE_NOT_SELECT_ITEM_ID,
component.getId(),
value.getClass().getName()));
}
}
} else if (value instanceof Map) {
Map optionMap = (Map) value;
for (Object o : optionMap.entrySet()) {
Entry entry = (Entry) o;
Object key = entry.getKey();
Object val = entry.getValue();
if (key == null || val == null) {
continue;
}
list.add(new SelectItem(val, key.toString()));
}
} else {
throw new IllegalArgumentException(
MessageUtils.getExceptionMessageString(
MessageUtils.CHILD_NOT_OF_EXPECTED_TYPE_ID,
"UISelectItem/UISelectItems",
component.getFamily(),
component.getId(),
value != null ? value.getClass().getName() : "null"));
}
}
}
return (list);
}