I want to find some UIComponent
from managed bean by the id that I have provided.
I have written the following code:
private UIComponent getUIComponent(String id) {
return FacesContext.getCurrentInstance().getViewRoot().findComponent(id) ;
}
I have defined a p:inputTextarea
as:
<p:inputTextarea id="activityDescription" value="#{adminController.activityDTO.activityDescription}" required="true" maxlength="120"
autoResize="true" counter="counter" counterTemplate="{0} characters remaining." cols="80" rows="2" />
Now if a call to the method as getUIComponent("activityDescription")
it is returning null
, but if I call it as getUIComponent("adminTabView:activityForm:activityDescription")
then I can get the org.primefaces.component.inputtextarea.InputTextarea
instance.
Is there any way to get the component with only the id i.e., "activityDescription" not the absolute id i.e., "adminTabView:activityForm:activityDescription"?
You can use the following code:
public UIComponent findComponent(final String id) {
FacesContext context = FacesContext.getCurrentInstance();
UIViewRoot root = context.getViewRoot();
final UIComponent[] found = new UIComponent[1];
root.visitTree(new FullVisitContext(context), new VisitCallback() {
@Override
public VisitResult visit(VisitContext context, UIComponent component) {
if (component != null
&& component.getId() != null
&& component.getId().equals(id)) {
found[0] = component;
return VisitResult.COMPLETE;
}
return VisitResult.ACCEPT;
}
});
return found[0];
}
This code will find only the first component in the tree with the id
you pass. You will have to do something custom if there are 2 components with the same name in the tree (this is possible if they are under 2 different naming containers).