org.springframework.web.servlet.handler

Class MappedInterceptor

java.lang.Object

org.springframework.web.servlet.handler.MappedInterceptor

All Implemented Interfaces:

HandlerInterceptor

public final class MappedInterceptor
extends Object
implements HandlerInterceptor

Contains and delegates calls to a HandlerInterceptor along with include (and optionally exclude) path patterns to which the interceptor should apply. Also provides matching logic to test if the interceptor applies to a given request path.

A MappedInterceptor can be registered directly with any AbstractHandlerMethodMapping. Furthermore, beans of type MappedInterceptor are automatically detected by AbstractHandlerMethodMapping (including ancestor ApplicationContext's) which effectively means the interceptor is registered "globally" with all handler mappings.

Since:

3.0

Author:

Keith Donald, Rossen Stoyanchev, Brian Clozel

Constructor Summary

Constructors

Constructor and Description
MappedInterceptor(String[] includePatterns, HandlerInterceptor interceptor) Create a new MappedInterceptor instance.
MappedInterceptor(String[] includePatterns, String[] excludePatterns, HandlerInterceptor interceptor) Create a new MappedInterceptor instance.
MappedInterceptor(String[] includePatterns, String[] excludePatterns, WebRequestInterceptor interceptor) Create a new MappedInterceptor instance.
MappedInterceptor(String[] includePatterns, WebRequestInterceptor interceptor) Create a new MappedInterceptor instance.

Method Summary

Modifier and Type	Method and Description
void	afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) Callback after completion of request processing, that is, after rendering the view.
HandlerInterceptor	getInterceptor() The actual Interceptor reference.
PathMatcher	getPathMatcher() The configured PathMatcher, or null if none.
String[]	getPathPatterns() The path into the application the interceptor is mapped to.
boolean	matches(String lookupPath, PathMatcher pathMatcher) Returns true if the interceptor applies to the given request path.
void	postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) Intercept the execution of a handler.
boolean	preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) Intercept the execution of a handler.
void	setPathMatcher(PathMatcher pathMatcher) Configure a PathMatcher to use with this MappedInterceptor instead of the one passed by default to the matches(String, org.springframework.util.PathMatcher) method.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MappedInterceptor

public MappedInterceptor(@Nullable
                         String[] includePatterns,
                         HandlerInterceptor interceptor)

Create a new MappedInterceptor instance.

Parameters:

includePatterns - the path patterns to map with a null value matching to all paths

interceptor - the HandlerInterceptor instance to map to the given patterns

MappedInterceptor

public MappedInterceptor(@Nullable
                         String[] includePatterns,
                         @Nullable
                         String[] excludePatterns,
                         HandlerInterceptor interceptor)

Create a new MappedInterceptor instance.

Parameters:

includePatterns - the path patterns to map with a null value matching to all paths

excludePatterns - the path patterns to exclude

interceptor - the HandlerInterceptor instance to map to the given patterns

MappedInterceptor

public MappedInterceptor(@Nullable
                         String[] includePatterns,
                         WebRequestInterceptor interceptor)

Create a new MappedInterceptor instance.

Parameters:

includePatterns - the path patterns to map with a null value matching to all paths

interceptor - the WebRequestInterceptor instance to map to the given patterns

MappedInterceptor

public MappedInterceptor(@Nullable
                         String[] includePatterns,
                         @Nullable
                         String[] excludePatterns,
                         WebRequestInterceptor interceptor)

Create a new MappedInterceptor instance.

Parameters:

includePatterns - the path patterns to map with a null value matching to all paths

interceptor - the WebRequestInterceptor instance to map to the given patterns

Method Detail

setPathMatcher

public void setPathMatcher(@Nullable
                           PathMatcher pathMatcher)

Configure a PathMatcher to use with this MappedInterceptor instead of the one passed by default to the matches(String, org.springframework.util.PathMatcher) method. This is an advanced property that is only required when using custom PathMatcher implementations that support mapping metadata other than the Ant-style path patterns supported by default.

getPathMatcher

@Nullable
public PathMatcher getPathMatcher()

The configured PathMatcher, or null if none.

getPathPatterns

@Nullable
public String[] getPathPatterns()

The path into the application the interceptor is mapped to.

getInterceptor

public HandlerInterceptor getInterceptor()

The actual Interceptor reference.

matches

public boolean matches(String lookupPath,
                       PathMatcher pathMatcher)

Returns true if the interceptor applies to the given request path.

Parameters:

lookupPath - the current request path

pathMatcher - a path matcher for path pattern matching

preHandle

public boolean preHandle(HttpServletRequest request,
                         HttpServletResponse response,
                         Object handler)
                  throws Exception

Description copied from interface: HandlerInterceptor

Intercept the execution of a handler. Called after HandlerMapping determined an appropriate handler object, but before HandlerAdapter invokes the handler.

DispatcherServlet processes a handler in an execution chain, consisting of any number of interceptors, with the handler itself at the end. With this method, each interceptor can decide to abort the execution chain, typically sending a HTTP error or writing a custom response.

Note: special considerations apply for asynchronous request processing. For more details see AsyncHandlerInterceptor.

The default implementation 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,
                       @Nullable
                       ModelAndView modelAndView)
                throws Exception

Description copied from interface: HandlerInterceptor

Intercept the execution of a handler. Called after HandlerAdapter actually invoked the handler, but before the DispatcherServlet renders the view. Can expose additional model objects to the view via the given ModelAndView.

DispatcherServlet processes a handler in an execution chain, consisting of any number of interceptors, with the handler itself at the end. With this method, each interceptor can post-process an execution, getting applied in inverse order of the execution chain.

Note: special considerations apply for asynchronous request processing. For more details see AsyncHandlerInterceptor.

The default 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,
                            @Nullable
                            Exception ex)
                     throws Exception

Description copied from interface: HandlerInterceptor

Callback after completion of request processing, that is, after rendering the view. Will be called on any outcome of handler execution, thus allows for proper resource cleanup.

Note: Will only be called if this interceptor's preHandle method has successfully completed and returned true!

As with the postHandle method, the method will be invoked on each interceptor in the chain in reverse order, so the first interceptor will be the last to be invoked.

Note: special considerations apply for asynchronous request processing. For more details see AsyncHandlerInterceptor.

The default 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