code: private Object makeModelObject(String formName) {
  		Object object = null;
  		Class modelClass = null;
  		try {
  			modelClass = (Class) modelFactory.getModelClasses(formName);
  			if (modelClass == null) {
  				throw new Exception(" not found the model in config xml, formName=" + formName);
  			}
  			object = modelClass.newInstance();
  			// inject
  			modelProxyInjection.injectProperties(object);
  		} catch (Exception e) {
  			Debug.logError("[JdonFramework]--> call Model: " + modelClass + " error:" + e, module);
  		}
  		return object;
  	}
docs: create model instance from the model class that read from the xml
  configure.
  
  @param formName
  @return
  @throws Exception