public void processEvent(FacesEvent event) throws AbortProcessingException {
FacesContext faces = FacesContext.getCurrentInstance();
if (faces == null) {
return;
}
L instance = null;
if (this.binding != null) {
instance = (L) binding.getValue(faces.getELContext());
}
if (instance == null && this.type != null) {
try {
instance = (L) TagHandlerUtils.loadClass(this.type, Object.class).newInstance();
} catch (Exception e) {
throw new AbortProcessingException("Couldn't Lazily instantiate EventListener", e);
}
if (this.binding != null) {
binding.setValue(faces.getELContext(), instance);
}
}
if (instance != null) {
event.processListener(instance);
}
}
public void apply(FaceletContext ctx, UIComponent parent) throws IOException {
// only process if it's been created
if (parent == null || !ComponentHandler.isNew(parent)) {
return;
}
if (isEventSource(parent)) {
applyAttachedObject(ctx.getFacesContext(), parent);
} else if (UIComponent.isCompositeComponent(parent)) {
// Allow the composite component to know about the target component.
TagHandlerUtils.getOrCreateRetargetableHandlersList(parent).add(this);
} else {
throw new TagException(
this.tag, "Parent does not match event source requirements: " + parent);
}
}
public EventListenerHandler(TagConfig config) {
super(config);
this.binding = this.getAttribute("binding");
TagAttribute type = this.getAttribute("type");
if (type != null) {
if (type.isLiteral()) {
try {
TagHandlerUtils.loadClass(type.getValue(), Object.class);
} catch (ClassNotFoundException e) {
throw new TagAttributeException(type, "Couldn't qualify EventListener", e);
}
} else {
throw new TagAttributeException(type, "Must be a literal class name of type EventListener");
}
this.listenerType = type.getValue();
} else {
this.listenerType = null;
}
}
