ModelFactory

class ModelFactory

Assist with initialization of the Model before controller method invocation and with updates to it after the invocation.

On initialization the model is populated with attributes temporarily stored in the session and through the invocation of @ModelAttribute methods.

On update model attributes are synchronized with the session and also BindingResult attributes are added if missing.

Author
Rossen Stoyanchev

Since
3.1

ModelFactory(handlerMethods: MutableList<InvocableHandlerMethod>, binderFactory: WebDataBinderFactory, attributeHandler: SessionAttributesHandler)

Create a new instance with the given @ModelAttribute methods.

getNameForParameter	`static fun getNameForParameter(parameter: MethodParameter): String` Derive the model attribute name for the given method parameter based on a `@ModelAttribute` parameter annotation (if present) or falling back on parameter type based conventions.
getNameForReturnValue	`static fun getNameForReturnValue(returnValue: Any, returnType: MethodParameter): String` Derive the model attribute name for the given return value based on: the method `ModelAttribute` annotation value the declared return type if it is more specific than `Object` the actual return value type
initModel	`fun initModel(request: NativeWebRequest, container: ModelAndViewContainer, handlerMethod: HandlerMethod): Unit` Populate the model in the following order: Retrieve "known" session attributes listed as `@SessionAttributes`. Invoke `@ModelAttribute` methods Find `@ModelAttribute` method arguments also listed as `@SessionAttributes` and ensure they're present in the model raising an exception if necessary.
updateModel	`fun updateModel(request: NativeWebRequest, container: ModelAndViewContainer): Unit` Promote model attributes listed as `@SessionAttributes` to the session. Add BindingResult attributes where necessary.