static Renderer getRenderer(final FacesContext context, final UIComponent component) {
final String rendererType = component.getRendererType();
if (rendererType == null) {
return null;
}
final RenderKit renderKit = RenderKitUtil.getRenderKit(context);
return renderKit.getRenderer(component.getFamily(), rendererType);
}
public static String getWidgetVar(String id) {
UIComponent component = findComponent(FacesContext.getCurrentInstance().getViewRoot(), id);
Renderer renderer =
FacesContext.getCurrentInstance()
.getRenderKit()
.getRenderer(component.getFamily(), component.getRendererType());
if (component == null) throw new FacesException("Cannot find component " + id + " in view.");
else if (!(renderer instanceof CoreRenderer))
throw new FacesException("Component with id " + id + " is not derived from CoreRenderer.");
return ((CoreRenderer) renderer).resolveWidgetVar(component);
}
/**
* After nornal setting <code>parent</code> property in case of created component set Ajax
* properties for parent.
*
* @see javax.faces.component.UIComponentBase#setParent(javax.faces.component.UIComponent)
*/
public void setParent(UIComponent parent) {
super.setParent(parent);
if (null != parent && parent.getFamily() != null) {
if (log.isDebugEnabled()) {
log.debug(Messages.getMessage(Messages.CALLED_SET_PARENT, parent.getClass().getName()));
}
// TODO If this comopnent configured, set properties for parent
// component.
// NEW created component have parent, restored view - null in My
// faces.
// and SUN RI not call at restore saved view.
// In other case - set in restoreState method.
// if (parent.getParent() != null)
{
if (log.isDebugEnabled()) {
log.debug(Messages.getMessage(Messages.DETECT_NEW_COMPONENT));
}
setParentProperties(parent);
}
}
}
/**
* 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);
}
public static boolean isLiteralText(UIComponent component) {
return component.getFamily().equalsIgnoreCase("facelets.LiteralText");
}