java.lang.Object
- org.springframework.web.method.annotation.ModelAttributeMethodProcessor
- - org.springframework.web.servlet.mvc.method.annotation.ServletModelAttributeMethodProcessor

All Implemented Interfaces:
HandlerMethodArgumentResolver, HandlerMethodReturnValueHandler
```
public class ServletModelAttributeMethodProcessor
extends ModelAttributeMethodProcessor
```
A Servlet-specific ModelAttributeMethodProcessor that applies data binding through a WebDataBinder of type ServletRequestDataBinder.
Also adds a fall-back strategy to instantiate the model attribute from a URI template variable or from a request parameter if the name matches the model attribute name and there is an appropriate type conversion strategy.
Since:
3.1
Author:
Rossen Stoyanchev, Juergen Hoeller

Field Summary
- Fields inherited from class org.springframework.web.method.annotation.ModelAttributeMethodProcessor
  logger

Constructor Summary
Constructors
Constructor Description
ServletModelAttributeMethodProcessor(boolean annotationNotRequired)
Class constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`bindRequestParameters(WebDataBinder binder, NativeWebRequest request)`	This implementation downcasts `WebDataBinder` to `ServletRequestDataBinder` before binding.
`protected Object`	`createAttribute(String attributeName, MethodParameter parameter, WebDataBinderFactory binderFactory, NativeWebRequest request)`	Instantiate the model attribute from a URI template variable or from a request parameter if the name matches to the model attribute name and if there is an appropriate type conversion strategy.
`protected Object`	`createAttributeFromRequestValue(String sourceValue, String attributeName, MethodParameter parameter, WebDataBinderFactory binderFactory, NativeWebRequest request)`	Create a model attribute from a String request value (e.g.
`protected String`	`getRequestValueForAttribute(String attributeName, NativeWebRequest request)`	Obtain a value from the request that may be used to instantiate the model attribute through type conversion from String to the target type.
`protected Map<String,String>`	`getUriTemplateVariables(NativeWebRequest request)`

Methods inherited from class org.springframework.web.method.annotation.ModelAttributeMethodProcessor
handleReturnValue, isBindExceptionRequired, resolveArgument, supportsParameter, supportsReturnType, validateIfApplicable

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ServletModelAttributeMethodProcessor
```
public ServletModelAttributeMethodProcessor(boolean annotationNotRequired)
```
    Class constructor.
    Parameters:
    annotationNotRequired - if "true", non-simple method arguments and return values are considered model attributes with or without a @ModelAttribute annotation
- Method Detail
  - createAttribute
```
protected final Object createAttribute(String attributeName,
                                       MethodParameter parameter,
                                       WebDataBinderFactory binderFactory,
                                       NativeWebRequest request)
                                throws Exception
```
    Instantiate the model attribute from a URI template variable or from a request parameter if the name matches to the model attribute name and if there is an appropriate type conversion strategy. If none of these are true delegate back to the base class.
    Overrides:
    createAttribute in class ModelAttributeMethodProcessor
    Parameters:
    attributeName - the name of the attribute (never null)
    parameter - the method parameter
    binderFactory - for creating WebDataBinder instance
    request - the current request
    Returns:
    the created model attribute (never null)
    Throws:
    Exception
    See Also:
    createAttributeFromRequestValue(java.lang.String, java.lang.String, org.springframework.core.MethodParameter, org.springframework.web.bind.support.WebDataBinderFactory, org.springframework.web.context.request.NativeWebRequest)
  - getRequestValueForAttribute
```
protected String getRequestValueForAttribute(String attributeName,
                                             NativeWebRequest request)
```
    Obtain a value from the request that may be used to instantiate the model attribute through type conversion from String to the target type.
    The default implementation looks for the attribute name to match a URI variable first and then a request parameter.
    Parameters:
    attributeName - the model attribute name
    request - the current request
    Returns:
    the request value to try to convert, or null if none
  - getUriTemplateVariables
```
protected final Map<String,String> getUriTemplateVariables(NativeWebRequest request)
```
  - createAttributeFromRequestValue
```
protected Object createAttributeFromRequestValue(String sourceValue,
                                                 String attributeName,
                                                 MethodParameter parameter,
                                                 WebDataBinderFactory binderFactory,
                                                 NativeWebRequest request)
                                          throws Exception
```
    Create a model attribute from a String request value (e.g. URI template variable, request parameter) using type conversion.
    The default implementation converts only if there a registered Converter that can perform the conversion.
    Parameters:
    sourceValue - the source value to create the model attribute from
    attributeName - the name of the attribute (never null)
    parameter - the method parameter
    binderFactory - for creating WebDataBinder instance
    request - the current request
    Returns:
    the created model attribute, or null if no suitable conversion found
    Throws:
    Exception
  - bindRequestParameters
```
protected void bindRequestParameters(WebDataBinder binder,
                                     NativeWebRequest request)
```
    This implementation downcasts WebDataBinder to ServletRequestDataBinder before binding.
    Overrides:
    bindRequestParameters in class ModelAttributeMethodProcessor
    Parameters:
    binder - the data binder instance to use for the binding
    request - the current request
    See Also:
    ServletRequestDataBinderFactory

Class ServletModelAttributeMethodProcessor

Field Summary

Fields inherited from class org.springframework.web.method.annotation.ModelAttributeMethodProcessor

Constructor Summary

Method Summary

Methods inherited from class org.springframework.web.method.annotation.ModelAttributeMethodProcessor

Methods inherited from class java.lang.Object

Constructor Detail

ServletModelAttributeMethodProcessor

Method Detail

createAttribute

getRequestValueForAttribute

getUriTemplateVariables

createAttributeFromRequestValue

bindRequestParameters