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java.lang.Object org.springframework.context.support.ApplicationObjectSupport org.springframework.web.portlet.handler.AbstractHandlerMapping org.springframework.web.portlet.handler.AbstractMapBasedHandlerMapping org.springframework.web.portlet.handler.PortletModeParameterHandlerMapping
public class PortletModeParameterHandlerMapping
Implementation of the HandlerMapping interface to map from the current PortletMode and a request parameter to request handler beans. The mapping consists of two levels: first the PortletMode and then the parameter value. In order to be mapped, both elements must match the mapping definition.
This is a combination of the methods used in PortletModeHandlerMapping
and ParameterHandlerMapping
. Unlike
those two classes, this mapping cannot be initialized with properties since it
requires a two-level map.
The default name of the parameter is "action", but can be changed using
setParameterName()
.
By default, the same parameter value may not be used in two different portlet
modes. This is so that if the portal itself changes the portlet mode, the request
will no longer be valid in the mapping. This behavior can be changed with
setAllowDupParameters()
.
The bean configuration for this mapping will look somthing like this:
<bean id="portletModeParameterHandlerMapping" class="org.springframework.web.portlet.handler.PortletModeParameterHandlerMapping"> <property name="portletModeParameterMap"> <map> <entry key="view"> <!-- portlet mode: view --> <map> <entry key="add"><ref bean="addItemHandler"/></entry> <entry key="edit"><ref bean="editItemHandler"/></entry> <entry key="delete"><ref bean="deleteItemHandler"/></entry> </map> </entry> <entry key="edit"> <!-- portlet mode: edit --> <map> <entry key="prefs"><ref bean="preferencesHandler"/></entry> <entry key="resetPrefs"><ref bean="resetPreferencesHandler"/></entry> </map> </entry> </map> </property> </bean>
This mapping can be chained ahead of a PortletModeHandlerMapping
,
which can then provide defaults for each mode and an overall default as well.
Thanks to Rainer Schmitz and Yujin Kim for suggesting this mapping strategy!
ParameterMappingInterceptor
Field Summary | |
---|---|
static String |
DEFAULT_PARAMETER_NAME
Default request parameter name to use for mapping to handlers: "action". |
protected Map |
modeHandlerMap
|
Fields inherited from class org.springframework.context.support.ApplicationObjectSupport |
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logger |
Fields inherited from interface org.springframework.core.Ordered |
---|
HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE |
Constructor Summary | |
---|---|
PortletModeParameterHandlerMapping()
|
Method Summary | |
---|---|
protected Object |
getLookupKey(PortletRequest request)
Returns a lookup key that combines the current PortletMode and the current value of the specified parameter. |
void |
initApplicationContext()
Calls the registerHandlers method in addition
to the superclass's initialization. |
protected void |
registerHandler(PortletMode mode,
Map parameterMap)
Register all handlers specified in the given parameter map. |
protected void |
registerHandler(PortletMode mode,
String parameter,
Object handler)
Register the given handler instance for the given PortletMode and parameter value, under an appropriate lookup key. |
protected void |
registerHandlers(Map portletModeParameterMap)
Register all handlers specified in the Portlet mode map for the corresponding modes. |
void |
setAllowDuplicateParameters(boolean allowDuplicateParameters)
Set whether to allow duplicate parameter values across different portlet modes. |
void |
setParameterName(String parameterName)
Set the name of the parameter used for mapping to handlers. |
void |
setPortletModeParameterMap(Map portletModeParameterMap)
Set a Map with portlet mode names as keys and another Map as values. |
Methods inherited from class org.springframework.web.portlet.handler.AbstractMapBasedHandlerMapping |
---|
getHandlerInternal, registerHandler, setLazyInitHandlers |
Methods inherited from class org.springframework.web.portlet.handler.AbstractHandlerMapping |
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adaptInterceptor, extendInterceptors, getAdaptedInterceptors, getDefaultHandler, getHandler, getHandlerExecutionChain, getOrder, initInterceptors, setApplyWebRequestInterceptorsToRenderPhaseOnly, setDefaultHandler, setInterceptors, setOrder |
Methods inherited from class org.springframework.context.support.ApplicationObjectSupport |
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getApplicationContext, getMessageSourceAccessor, isContextRequired, requiredContextClass, setApplicationContext |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
public static final String DEFAULT_PARAMETER_NAME
protected final Map modeHandlerMap
Constructor Detail |
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public PortletModeParameterHandlerMapping()
Method Detail |
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public void setParameterName(String parameterName)
Default is "action".
public void setPortletModeParameterMap(Map portletModeParameterMap)
Convenient for population with bean references.
portletModeParameterMap
- two-level map of portlet modes and parameters to handler beanspublic void setAllowDuplicateParameters(boolean allowDuplicateParameters)
Doing this is dangerous because the portlet mode can be changed by the portal itself and the only way to see that is a rerender of the portlet. If the same parameter value is legal in multiple modes, then a change in mode could result in a matched mapping that is not intended and the user could end up in a strange place in the application.
public void initApplicationContext() throws BeansException
registerHandlers
method in addition
to the superclass's initialization.
initApplicationContext
in class AbstractHandlerMapping
ApplicationContextException
- in case of initialization errors
BeansException
- if thrown by ApplicationContext methodsregisterHandlers(java.util.Map)
protected void registerHandlers(Map portletModeParameterMap) throws BeansException
registerHandlers
in class AbstractMapBasedHandlerMapping
portletModeParameterMap
- Map with mode names as keys and parameter Maps as values
BeansException
- if the handler couldn't be registeredprotected void registerHandler(PortletMode mode, Map parameterMap) throws BeansException
parameterMap
- Map with parameter names as keys and handler beans or bean names as values
BeansException
- if the handler couldn't be registeredprotected void registerHandler(PortletMode mode, String parameter, Object handler) throws BeansException, IllegalStateException
mode
- the PortletMode for which this mapping is validparameter
- the parameter value to which this handler is mappedhandler
- the handler instance bean
BeansException
- if the handler couldn't be registered
IllegalStateException
- if there is a conflicting handler registeredAbstractMapBasedHandlerMapping.registerHandler(Object, Object)
protected Object getLookupKey(PortletRequest request) throws Exception
getLookupKey
in class AbstractMapBasedHandlerMapping
request
- current portlet request
null
)
Exception
- if key computation failedPortletRequest.getPortletMode()
,
setParameterName(java.lang.String)
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