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

Wraps a HandlerInterceptor and uses URL patterns to determine whether it applies to a given request.

Pattern matching can be done with PathMatcher or with parsed PathPattern. The syntax is largely the same with the latter being more tailored for web usage and more efficient. The choice is driven by the presence of a resolved String lookupPath or a parsed RequestPath which in turn depends on the HandlerMapping that matched the current request.

MappedInterceptor is supported by sub-classes of AbstractHandlerMethodMapping which detect beans of type MappedInterceptor and also check if interceptors directly registered with it are of this type.

Since:

3.0

Author:

Keith Donald, Rossen Stoyanchev, Brian Clozel

Constructor Summary

Constructors

Constructor and Description
MappedInterceptor(String[] includePatterns, HandlerInterceptor interceptor) Variant of MappedInterceptor(String[], String[], HandlerInterceptor, PathPatternParser) with include patterns only.
MappedInterceptor(String[] includePatterns, String[] excludePatterns, HandlerInterceptor interceptor) Variant of MappedInterceptor(String[], String[], HandlerInterceptor, PathPatternParser) without a provided parser.
MappedInterceptor(String[] includePatterns, String[] excludePatterns, HandlerInterceptor interceptor, PathPatternParser parser) Create an instance with the given include and exclude patterns along with the target interceptor for the mappings.
MappedInterceptor(String[] includePatterns, String[] excludePatterns, WebRequestInterceptor interceptor) Variant of MappedInterceptor(String[], String[], HandlerInterceptor, PathPatternParser) with a WebRequestInterceptor as the target.
MappedInterceptor(String[] includePatterns, WebRequestInterceptor interceptor) Variant of MappedInterceptor(String[], String[], HandlerInterceptor, PathPatternParser) with a WebRequestInterceptor as the target.

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 target HandlerInterceptor to invoke in case of a match.
PathMatcher	getPathMatcher() The configured PathMatcher.
String[]	getPathPatterns() Return the patterns this interceptor is mapped to.
boolean	matches(HttpServletRequest request) Check whether this interceptor is mapped to the request.
boolean	matches(String lookupPath, PathMatcher pathMatcher) Deprecated. as of 5.3 in favor of matches(HttpServletRequest)
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 the PathMatcher to use to match URL paths with against include and exclude patterns.

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,
                         @Nullable
                         String[] excludePatterns,
                         HandlerInterceptor interceptor,
                         @Nullable
                         PathPatternParser parser)

Create an instance with the given include and exclude patterns along with the target interceptor for the mappings.

Parameters:

includePatterns - patterns to which requests must match, or null to match all paths

excludePatterns - patterns to which requests must not match

interceptor - the target interceptor

parser - a parser to use to pre-parse patterns into PathPattern; when not provided, PathPatternParser.defaultInstance is used.

Since:

5.3

MappedInterceptor

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

Variant of MappedInterceptor(String[], String[], HandlerInterceptor, PathPatternParser) with include patterns only.

MappedInterceptor

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

Variant of MappedInterceptor(String[], String[], HandlerInterceptor, PathPatternParser) without a provided parser.

MappedInterceptor

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

Variant of MappedInterceptor(String[], String[], HandlerInterceptor, PathPatternParser) with a WebRequestInterceptor as the target.

MappedInterceptor

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

Variant of MappedInterceptor(String[], String[], HandlerInterceptor, PathPatternParser) with a WebRequestInterceptor as the target.

Method Detail

getPathPatterns

@Nullable
public String[] getPathPatterns()

Return the patterns this interceptor is mapped to.

getInterceptor

public HandlerInterceptor getInterceptor()

The target HandlerInterceptor to invoke in case of a match.

setPathMatcher

public void setPathMatcher(PathMatcher pathMatcher)

Configure the PathMatcher to use to match URL paths with against include and exclude patterns.

This is an advanced property that should be used only when a customized AntPathMatcher or a custom PathMatcher is required.

By default this is AntPathMatcher.

Note: Setting PathMatcher enforces use of String pattern matching even when a parsed RequestPath is available.

getPathMatcher

public PathMatcher getPathMatcher()

The configured PathMatcher.

matches

public boolean matches(HttpServletRequest request)

Check whether this interceptor is mapped to the request.

The request mapping path is expected to have been resolved externally. See also class-level Javadoc.

Parameters:

request - the request to match to

Returns:

true if the interceptor should be applied to the request

matches

@Deprecated
public boolean matches(String lookupPath,
                                   PathMatcher pathMatcher)

Deprecated. as of 5.3 in favor of matches(HttpServletRequest)

Determine a match for the given lookup path.

Parameters:

lookupPath - the current request path

pathMatcher - a path matcher for path pattern matching

Returns:

true if the interceptor applies to the given request path

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 an 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 - the 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 - the handler (or HandlerMethod) that started asynchronous execution, for type and/or instance examination

ex - any exception thrown on handler execution, if any; this does not include exceptions that have been handled through an exception resolver

Throws:

Exception - in case of errors