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AbstractMapBasedHandlerMapping (Spring Framework API 2.0) - Spring Framework 2.0.5 API 文档英文版

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org.springframework.web.portlet.handler
Class AbstractMapBasedHandlerMapping

java.lang.Object
  org.springframework.context.support.ApplicationObjectSupport
      org.springframework.web.portlet.handler.AbstractHandlerMapping
          org.springframework.web.portlet.handler.AbstractMapBasedHandlerMapping

All Implemented Interfaces:

ApplicationContextAware, Ordered, HandlerMapping

Direct Known Subclasses:

ParameterHandlerMapping, PortletModeHandlerMapping, PortletModeParameterHandlerMapping

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public abstract class AbstractMapBasedHandlerMapping
extends AbstractHandlerMapping

Abstract base class for HandlerMapping implementations that rely on a map which caches handler objects per lookup key. Supports arbitrary lookup keys, and automatically resolves handler bean names into handler bean instances.

Since:

2.0

Author:

Juergen Hoeller

See Also:

getLookupKey(javax.portlet.PortletRequest), registerHandler(Object, Object)

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Field Summary

 

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

 

Fields inherited from interface org.springframework.core.Ordered
HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE

 

Constructor Summary
AbstractMapBasedHandlerMapping()

 

Method Summary
protected  Object	getHandlerInternal(PortletRequest request)           Determines a handler for the computed lookup key for the given request.
protected abstract  Object	getLookupKey(PortletRequest request)           Build a lookup key for the given request.
protected  void	registerHandler(Object lookupKey, Object handler)           Register the given handler instance for the given parameter value.
protected  void	registerHandlers(Map handlerMap)           Register all handlers specified in the Portlet mode map for the corresponding modes.
void	setLazyInitHandlers(boolean lazyInitHandlers)           Set whether to lazily initialize handlers.

 

Methods inherited from class org.springframework.web.portlet.handler.AbstractHandlerMapping
adaptInterceptor, extendInterceptors, getAdaptedInterceptors, getDefaultHandler, getHandler, getHandlerExecutionChain, getOrder, initApplicationContext, initInterceptors, setApplyWebRequestInterceptorsToRenderPhaseOnly, setDefaultHandler, setInterceptors, setOrder

 

Methods inherited from class org.springframework.context.support.ApplicationObjectSupport
getApplicationContext, getMessageSourceAccessor, isContextRequired, requiredContextClass, setApplicationContext

 

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

 

Constructor Detail

AbstractMapBasedHandlerMapping

public AbstractMapBasedHandlerMapping()

Method Detail

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 handler objects directly.

If you want to allow your handlers 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.

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getHandlerInternal

protected Object getHandlerInternal(PortletRequest request)
                             throws Exception

Determines a handler for the computed lookup key for the given request.

Specified by:

getHandlerInternal in class AbstractHandlerMapping

Parameters:

request - current portlet request

Returns:

the corresponding handler instance, or null if none found

Throws:

Exception - if there is an internal error

See Also:

getLookupKey(javax.portlet.PortletRequest)

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getLookupKey

protected abstract Object getLookupKey(PortletRequest request)
                                throws Exception

Build a lookup key for the given request.

Parameters:

request - current portlet request

Returns:

the lookup key (never null)

Throws:

Exception - if key computation failed

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registerHandlers

protected void registerHandlers(Map handlerMap)
                         throws BeansException

Register all handlers specified in the Portlet mode map for the corresponding modes.

Parameters:

handlerMap - Map with lookup keys as keys and handler beans or bean names as values

Throws:

BeansException - if the handler couldn't be registered

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registerHandler

protected void registerHandler(Object lookupKey,
                               Object handler)
                        throws BeansException,
                               IllegalStateException

Register the given handler instance for the given parameter value.

Parameters:

lookupKey - the key to map the handler onto

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

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