/**
* Create an appropriate form bean in the appropriate scope, if one does not already exist.
*
* @param context FacesContext for the current request
* @exception IllegalArgumentException if no ActionConfig for the specified action attribute can
* be located
* @exception IllegalArgumentException if no FormBeanConfig for the specified form bean can be
* located
* @exception IllegalArgumentException if no ModuleConfig can be located for this application
* module
*/
public void createActionForm(FacesContext context) {
// Look up the application module configuration information we need
ModuleConfig moduleConfig = lookupModuleConfig(context);
// Look up the ActionConfig we are processing
String action = getAction();
ActionConfig actionConfig = moduleConfig.findActionConfig(action);
if (actionConfig == null) {
throw new IllegalArgumentException("Cannot find action '" + action + "' configuration");
}
// Does this ActionConfig specify a form bean?
String name = actionConfig.getName();
if (name == null) {
return;
}
// Look up the FormBeanConfig we are processing
FormBeanConfig fbConfig = moduleConfig.findFormBeanConfig(name);
if (fbConfig == null) {
throw new IllegalArgumentException("Cannot find form bean '" + name + "' configuration");
}
// Does a usable form bean attribute already exist?
String attribute = actionConfig.getAttribute();
String scope = actionConfig.getScope();
ActionForm instance = null;
if ("request".equals(scope)) {
instance = (ActionForm) context.getExternalContext().getRequestMap().get(attribute);
} else if ("session".equals(scope)) {
HttpSession session = (HttpSession) context.getExternalContext().getSession(true);
instance = (ActionForm) context.getExternalContext().getSessionMap().get(attribute);
}
if (instance != null) {
if (fbConfig.getDynamic()) {
String className = ((DynaBean) instance).getDynaClass().getName();
if (className.equals(fbConfig.getName())) {
if (log.isDebugEnabled()) {
log.debug(
" Recycling existing DynaActionForm instance " + "of type '" + className + "'");
}
return;
}
} else {
try {
Class configClass = RequestUtils.applicationClass(fbConfig.getType());
if (configClass.isAssignableFrom(instance.getClass())) {
if (log.isDebugEnabled()) {
log.debug(
" Recycling existing ActionForm instance "
+ "of class '"
+ instance.getClass().getName()
+ "'");
}
return;
}
} catch (Throwable t) {
throw new IllegalArgumentException(
"Cannot load form bean class '" + fbConfig.getType() + "'");
}
}
}
// Create a new form bean instance
if (fbConfig.getDynamic()) {
try {
DynaActionFormClass dynaClass = DynaActionFormClass.createDynaActionFormClass(fbConfig);
instance = (ActionForm) dynaClass.newInstance();
if (log.isDebugEnabled()) {
log.debug(
" Creating new DynaActionForm instance " + "of type '" + fbConfig.getType() + "'");
log.trace(" --> " + instance);
}
} catch (Throwable t) {
throw new IllegalArgumentException(
"Cannot create form bean of type '" + fbConfig.getType() + "'");
}
} else {
try {
instance = (ActionForm) RequestUtils.applicationInstance(fbConfig.getType());
if (log.isDebugEnabled()) {
log.debug(" Creating new ActionForm instance " + "of type '" + fbConfig.getType() + "'");
log.trace(" --> " + instance);
}
} catch (Throwable t) {
throw new IllegalArgumentException(
"Cannot create form bean of class '" + fbConfig.getType() + "'");
}
}
// Configure and cache the form bean instance in the correct scope
ActionServlet servlet =
(ActionServlet)
context.getExternalContext().getApplicationMap().get(Globals.ACTION_SERVLET_KEY);
instance.setServlet(servlet);
if ("request".equals(scope)) {
context.getExternalContext().getRequestMap().put(attribute, instance);
} else if ("session".equals(scope)) {
context.getExternalContext().getSessionMap().put(attribute, instance);
}
}
