org.springframework.web.servlet.handler
Class AbstractUrlHandlerMapping

java.lang.Object
  org.springframework.context.support.ApplicationObjectSupport
      org.springframework.web.context.support.WebApplicationObjectSupport
          org.springframework.web.servlet.handler.AbstractHandlerMapping
              org.springframework.web.servlet.handler.AbstractUrlHandlerMapping

All Implemented Interfaces:

ApplicationContextAware, Ordered, ServletContextAware, HandlerMapping

Direct Known Subclasses:

AbstractPathMapHandlerMapping, BeanNameUrlHandlerMapping, ControllerClassNameHandlerMapping, SimpleUrlHandlerMapping

public abstract class AbstractUrlHandlerMapping
extends AbstractHandlerMapping

Abstract base class for URL-mapped HandlerMapping implementations. Provides infrastructure for mapping handlers to URLs and configurable URL lookup. For information on the latter, see "alwaysUseFullPath" property.

Supports direct matches, e.g. a registered "/test" matches "/test", and various Ant-style pattern matches, e.g. a registered "/t*" pattern matches both "/test" and "/team", "/test/*" matches all paths in the "/test" directory, "/test/**" matches all paths below "/test". For details, see the AntPathMatcher javadoc.

Will search all path patterns to find the most exact match for the current request path. The most exact match is defined as the longest path pattern that matches the current request path.

Since:

16.04.2003

Author:

Juergen Hoeller

See Also:

setAlwaysUseFullPath(boolean), setUrlDecode(boolean), AntPathMatcher

Field Summary

Fields inherited from class org.springframework.context.support.ApplicationObjectSupport

logger

Fields inherited from interface org.springframework.web.servlet.HandlerMapping

PATH_WITHIN_HANDLER_MAPPING_ATTRIBUTE

Fields inherited from interface org.springframework.core.Ordered

HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

Constructor Summary

AbstractUrlHandlerMapping()

Method Summary

protected void	exposePathWithinMapping(String pathWithinMapping, HttpServletRequest request) Expose the path within the current mapping as request attribute.
protected Object	getHandlerInternal(HttpServletRequest request) Look up a handler for the URL path of the given request.
Map	getHandlerMap() Return the registered handlers as an unmodifiable Map, with the registered path as key and the handler object (or handler bean name in case of a lazy-init handler) as value.
Object	getRootHandler() Return the root handler for this handler mapping (registered for "/"), or null if none.
protected Object	lookupHandler(String urlPath, HttpServletRequest request) Look up a handler instance for the given URL path.
protected void	registerHandler(String[] urlPaths, String beanName) Register the specified handler for the given URL paths.
protected void	registerHandler(String urlPath, Object handler) Register the specified handler for the given URL path.
void	setAlwaysUseFullPath(boolean alwaysUseFullPath) Set if URL lookup should always use the full path within the current servlet context.
void	setLazyInitHandlers(boolean lazyInitHandlers) Set whether to lazily initialize handlers.
void	setPathMatcher(PathMatcher pathMatcher) Set the PathMatcher implementation to use for matching URL paths against registered URL patterns.
void	setRootHandler(Object rootHandler) Set the root handler for this handler mapping, that is, the handler to be registered for the root path ("/").
void	setUrlDecode(boolean urlDecode) Set if context path and request URI should be URL-decoded.
void	setUrlPathHelper(UrlPathHelper urlPathHelper) Set the UrlPathHelper to use for resolution of lookup paths.

Methods inherited from class org.springframework.web.servlet.handler.AbstractHandlerMapping

adaptInterceptor, extendInterceptors, getAdaptedInterceptors, getDefaultHandler, getHandler, getHandlerExecutionChain, getOrder, initApplicationContext, initInterceptors, setDefaultHandler, setInterceptors, setOrder

Methods inherited from class org.springframework.web.context.support.WebApplicationObjectSupport

getServletContext, getTempDir, getWebApplicationContext, isContextRequired, setServletContext

Methods inherited from class org.springframework.context.support.ApplicationObjectSupport

getApplicationContext, getMessageSourceAccessor, requiredContextClass, setApplicationContext

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractUrlHandlerMapping

public AbstractUrlHandlerMapping()

Method Detail

setAlwaysUseFullPath

public void setAlwaysUseFullPath(boolean alwaysUseFullPath)

Set if URL lookup should always use the full path within the current servlet context. Else, the path within the current servlet mapping is used if applicable (that is, in the case of a ".../*" servlet mapping in web.xml).

Default is "false".

See Also:

UrlPathHelper.setAlwaysUseFullPath(boolean)

setUrlDecode

public void setUrlDecode(boolean urlDecode)

Set if context path and request URI should be URL-decoded. Both are returned undecoded by the Servlet API, in contrast to the servlet path.

Uses either the request encoding or the default encoding according to the Servlet spec (ISO-8859-1).

Note: Setting this to "true" requires JDK 1.4 if the encoding differs from the VM's platform default encoding, as JDK 1.3's URLDecoder class does not offer a way to specify the encoding.

See Also:

UrlPathHelper.setUrlDecode(boolean)

setUrlPathHelper

public void setUrlPathHelper(UrlPathHelper urlPathHelper)

Set the UrlPathHelper to use for resolution of lookup paths.

Use this to override the default UrlPathHelper with a custom subclass, or to share common UrlPathHelper settings across multiple HandlerMappings and MethodNameResolvers.

See Also:

AbstractUrlMethodNameResolver.setUrlPathHelper(org.springframework.web.util.UrlPathHelper)

setPathMatcher

public void setPathMatcher(PathMatcher pathMatcher)

Set the PathMatcher implementation to use for matching URL paths against registered URL patterns. Default is AntPathMatcher.

See Also:

AntPathMatcher

setRootHandler

public void setRootHandler(Object rootHandler)

Set the root handler for this handler mapping, that is, the handler to be registered for the root path ("/").

Default is null, indicating no root handler.

getRootHandler

public Object getRootHandler()

Return the root handler for this handler mapping (registered for "/"), or null if none.

setLazyInitHandlers

public void setLazyInitHandlers(boolean lazyInitHandlers)

Set whether to lazily initialize handlers. Only applicable to singleton handlers, as prototypes are always lazily initialized. Default is "false", as eager initialization allows for more efficiency through referencing the controller objects directly.

If you want to allow your controllers to be lazily initialized, make them "lazy-init" and set this flag to true. Just making them "lazy-init" will not work, as they are initialized through the references from the handler mapping in this case.

getHandlerInternal

protected Object getHandlerInternal(HttpServletRequest request)
                             throws Exception

Look up a handler for the URL path of the given request.

Specified by:

getHandlerInternal in class AbstractHandlerMapping

Parameters:

request - current HTTP request

Returns:

the handler instance, or null if none found

Throws:

Exception - if there is an internal error

lookupHandler

protected Object lookupHandler(String urlPath,
                               HttpServletRequest request)

Look up a handler instance for the given URL path.

Supports direct matches, e.g. a registered "/test" matches "/test", and various Ant-style pattern matches, e.g. a registered "/t*" matches both "/test" and "/team". For details, see the AntPathMatcher class.

Looks for the most exact pattern, where most exact is defined as the longest path pattern.

Parameters:

urlPath - URL the bean is mapped to

request - current HTTP request (to expose the path within the mapping to)

Returns:

the associated handler instance, or null if not found

See Also:

exposePathWithinMapping(java.lang.String, javax.servlet.http.HttpServletRequest), AntPathMatcher

exposePathWithinMapping

protected void exposePathWithinMapping(String pathWithinMapping,
                                       HttpServletRequest request)

Expose the path within the current mapping as request attribute.

Parameters:

pathWithinMapping - the path within the current mapping

request - the request to expose the path to

See Also:

HandlerMapping.PATH_WITHIN_HANDLER_MAPPING_ATTRIBUTE

registerHandler

protected void registerHandler(String[] urlPaths,
                               String beanName)
                        throws BeansException,
                               IllegalStateException

Register the specified handler for the given URL paths.

Parameters:

urlPaths - the URLs that the bean should be mapped to

beanName - the name of the handler bean

Throws:

BeansException - if the handler couldn't be registered

IllegalStateException - if there is a conflicting handler registered

registerHandler

protected void registerHandler(String urlPath,
                               Object handler)
                        throws BeansException,
                               IllegalStateException

Register the specified handler for the given URL path.

Parameters:

urlPath - the URL the bean should be mapped to

handler - the handler instance or handler bean name String (a bean name will automatically be resolved into the corrresponding handler bean)

Throws:

BeansException - if the handler couldn't be registered

IllegalStateException - if there is a conflicting handler registered

getHandlerMap

public final Map getHandlerMap()

Return the registered handlers as an unmodifiable Map, with the registered path as key and the handler object (or handler bean name in case of a lazy-init handler) as value.

See Also:

AbstractHandlerMapping.getDefaultHandler()