private static void renderHandler(
FacesContext context,
UIComponent component,
Collection<ClientBehaviorContext.Parameter> params,
String handlerName,
Object handlerValue,
String behaviorEventName)
throws IOException {
ResponseWriter writer = context.getResponseWriter();
String userHandler = getNonEmptyUserHandler(handlerValue);
List<ClientBehavior> behaviors = getClientBehaviors(component, behaviorEventName);
if ((null != behaviors) && (behaviors.size() > 0) && componentIsDisabled(component)) {
behaviors = null;
}
if (params == null) {
params = Collections.emptyList();
}
String handler = null;
switch (getHandlerType(behaviors, params, userHandler)) {
case USER_HANDLER_ONLY:
handler = userHandler;
break;
case SINGLE_BEHAVIOR_ONLY:
handler =
getSingleBehaviorHandler(
context, component, behaviors.get(0), params, behaviorEventName);
break;
case SUBMIT_ONLY:
handler = getSubmitHandler(context, component, params, true);
break;
case CHAIN:
handler =
getChainedHandler(
context, component, behaviors, params, behaviorEventName, userHandler);
break;
default:
assert (false);
}
writer.writeAttribute(handlerName, handler, null);
}
private static HandlerType getHandlerType(
List<ClientBehavior> behaviors,
Collection<ClientBehaviorContext.Parameter> params,
String userHandler) {
if ((behaviors == null) || (behaviors.isEmpty())) {
if (params.isEmpty()) return HandlerType.USER_HANDLER_ONLY;
return (userHandler == null) ? HandlerType.SUBMIT_ONLY : HandlerType.CHAIN;
}
if ((behaviors.size() == 1) && (userHandler == null)) {
ClientBehavior behavior = behaviors.get(0);
if (isSubmitting(behavior) || params.isEmpty()) return HandlerType.SINGLE_BEHAVIOR_ONLY;
}
return HandlerType.CHAIN;
}