java.lang.Object
- org.springframework.web.servlet.handler.HandlerInterceptorAdapter

All Implemented Interfaces:
AsyncHandlerInterceptor, HandlerInterceptor
Direct Known Subclasses:
ConversionServiceExposingInterceptor, LocaleChangeInterceptor, ResourceUrlProviderExposingInterceptor, ThemeChangeInterceptor, UserRoleAuthorizationInterceptor
```
public abstract class HandlerInterceptorAdapter
extends Object
implements AsyncHandlerInterceptor
```
Abstract adapter class for the AsyncHandlerInterceptor interface, for simplified implementation of pre-only/post-only interceptors.
Since:
05.12.2003
Author:
Juergen Hoeller

Constructor Summary
Constructors
Constructor Description
HandlerInterceptorAdapter()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)`	This implementation is empty.
`void`	`afterConcurrentHandlingStarted(HttpServletRequest request, HttpServletResponse response, Object handler)`	This implementation is empty.
`void`	`postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView)`	This implementation is empty.
`boolean`	`preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)`	This implementation always returns `true`.

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

- Constructor Detail
  - HandlerInterceptorAdapter
```
public HandlerInterceptorAdapter()
```
- Method Detail
  - preHandle
```
public boolean preHandle(HttpServletRequest request,
                         HttpServletResponse response,
                         Object handler)
                  throws Exception
```
    This implementation always returns true.
    Specified by:
    preHandle in interface HandlerInterceptor
    Parameters:
    request - current HTTP request
    response - current HTTP response
    handler - chosen handler to execute, for type and/or instance evaluation
    Returns:
    true if the execution chain should proceed with the next interceptor or the handler itself. Else, DispatcherServlet assumes that this interceptor has already dealt with the response itself.
    Throws:
    Exception - in case of errors
  - postHandle
```
public void postHandle(HttpServletRequest request,
                       HttpServletResponse response,
                       Object handler,
                       ModelAndView modelAndView)
                throws Exception
```
    This implementation is empty.
    Specified by:
    postHandle in interface HandlerInterceptor
    Parameters:
    request - current HTTP request
    response - current HTTP response
    handler - handler (or HandlerMethod) that started asynchronous execution, for type and/or instance examination
    modelAndView - the ModelAndView that the handler returned (can also be null)
    Throws:
    Exception - in case of errors
  - afterCompletion
```
public void afterCompletion(HttpServletRequest request,
                            HttpServletResponse response,
                            Object handler,
                            Exception ex)
                     throws Exception
```
    This implementation is empty.
    Specified by:
    afterCompletion in interface HandlerInterceptor
    Parameters:
    request - current HTTP request
    response - current HTTP response
    handler - handler (or HandlerMethod) that started asynchronous execution, for type and/or instance examination
    ex - exception thrown on handler execution, if any
    Throws:
    Exception - in case of errors
  - afterConcurrentHandlingStarted
```
public void afterConcurrentHandlingStarted(HttpServletRequest request,
                                           HttpServletResponse response,
                                           Object handler)
                                    throws Exception
```
    This implementation is empty.
    Specified by:
    afterConcurrentHandlingStarted in interface AsyncHandlerInterceptor
    Parameters:
    request - the current request
    response - the current response
    handler - the handler (or HandlerMethod) that started async execution, for type and/or instance examination
    Throws:
    Exception - in case of errors

Class HandlerInterceptorAdapter

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

HandlerInterceptorAdapter

Method Detail

preHandle

postHandle

afterCompletion

afterConcurrentHandlingStarted