/**
* Returns the parent of the ID space, or null if not found.
*
* @since 5.0.0
*/
public static IdSpace getParentIdSpace(IdSpace idspace) {
if (idspace instanceof Component) {
final Component c = (Component) idspace;
final Component p = c.getParent();
return p != null ? p.getSpaceOwner() : c.getPage();
}
return null;
}
/**
* Returns the page of the give component, or the current page if the component is null or it
* doesn't belong to any page. The current page is retrieved by {@link
* ExecutionCtrl#getCurrentPage} or the current execution. This method returns null if no
* execution or no current page at all.
*
* @param comp the component to retrieve the page. Ignored if null.
* @since 6.0.0
*/
public static Page getCurrentPage(Component comp) {
if (comp != null) {
Page page = comp.getPage();
if (page != null) return page;
}
final Execution exec = Executions.getCurrent();
return exec != null ? ((ExecutionCtrl) exec).getCurrentPage() : null;
}
private void internalInvoke(final Component component, final Object target) {
// save a reference to the page because the component can be removed
// during the invocation of the listener and thus lose its parent
Page page = component.getPage();
// initialization is required for stateless pages
if (!page.isInitialized()) {
page.internalInitialize();
}
((IRequestListener) target).onRequest();
}
/**
* Replaces a component with another.
*
* @param oldc the component to remove.
* @param newc the component to add
* @exception IllegalArgumentException if oldc's parent and page are both null.
* @since 3.5.2
*/
public static void replace(Component oldc, Component newc) {
final Component p = oldc.getParent(), sib = oldc.getNextSibling();
if (p != null) {
oldc.detach();
p.insertBefore(newc, sib);
} else {
final Page page = oldc.getPage();
if (page == null) throw new IllegalArgumentException("Neither child nor attached, " + oldc);
oldc.detach();
if (newc.getParent() != null) newc.detach();
newc.setPageBefore(page, sib);
}
}
