public abstract class AbstractHandlerMapping extends ApplicationObjectSupport implements HandlerMapping, Ordered
HandlerMapping
implementations. Supports ordering, a default handler, and handler interceptors.getHandlerInternal(PortletRequest)
,
setDefaultHandler(java.lang.Object)
,
setInterceptors(java.lang.Object[])
,
HandlerInterceptor
Modifier and Type | Field and Description |
---|---|
private HandlerInterceptor[] |
adaptedInterceptors |
private boolean |
applyWebRequestInterceptorsToRenderPhaseOnly |
private java.lang.Object |
defaultHandler |
private java.util.List<java.lang.Object> |
interceptors |
private int |
order |
logger
HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE
Constructor and Description |
---|
AbstractHandlerMapping() |
Modifier and Type | Method and Description |
---|---|
protected HandlerInterceptor |
adaptInterceptor(java.lang.Object interceptor)
Adapt the given interceptor object to the HandlerInterceptor interface.
|
protected void |
extendInterceptors(java.util.List interceptors)
Extension hook that subclasses can override to register additional interceptors,
given the configured interceptors (see
setInterceptors(java.lang.Object[]) ). |
protected HandlerInterceptor[] |
getAdaptedInterceptors()
Return the adapted interceptors as HandlerInterceptor array.
|
java.lang.Object |
getDefaultHandler()
Return the default handler for this handler mapping,
or
null if none. |
HandlerExecutionChain |
getHandler(PortletRequest request)
Look up a handler for the given request, falling back to the default
handler if no specific one is found.
|
protected HandlerExecutionChain |
getHandlerExecutionChain(java.lang.Object handler,
PortletRequest request)
Build a HandlerExecutionChain for the given handler, including applicable interceptors.
|
protected abstract java.lang.Object |
getHandlerInternal(PortletRequest request)
Look up a handler for the given request, returning
null if no
specific one is found. |
int |
getOrder()
Return the order value of this object, with a
higher value meaning greater in terms of sorting.
|
protected void |
initApplicationContext()
Initializes the interceptors.
|
protected void |
initInterceptors()
Initialize the specified interceptors, adapting them where necessary.
|
void |
setApplyWebRequestInterceptorsToRenderPhaseOnly(boolean applyWebRequestInterceptorsToRenderPhaseOnly)
Specify whether to apply WebRequestInterceptors to the Portlet render phase
only ("true", or whether to apply them to the Portlet action phase as well
("false").
|
void |
setDefaultHandler(java.lang.Object defaultHandler)
Set the default handler for this handler mapping.
|
void |
setInterceptors(java.lang.Object[] interceptors)
Set the interceptors to apply for all handlers mapped by this handler mapping.
|
void |
setOrder(int order)
Specify the order value for this HandlerMapping bean.
|
getApplicationContext, getMessageSourceAccessor, initApplicationContext, isContextRequired, requiredContextClass, setApplicationContext
private int order
private java.lang.Object defaultHandler
private final java.util.List<java.lang.Object> interceptors
private boolean applyWebRequestInterceptorsToRenderPhaseOnly
private HandlerInterceptor[] adaptedInterceptors
public final void setOrder(int order)
Default value is Integer.MAX_VALUE
, meaning that it's non-ordered.
Ordered.getOrder()
public final int getOrder()
Ordered
Normally starting with 0, with Integer.MAX_VALUE
indicating the greatest value. Same order values will result
in arbitrary positions for the affected objects.
Higher values can be interpreted as lower priority. As a consequence, the object with the lowest value has highest priority (somewhat analogous to Servlet "load-on-startup" values).
public void setDefaultHandler(java.lang.Object defaultHandler)
Default is null
, indicating no default handler.
public java.lang.Object getDefaultHandler()
null
if none.public void setInterceptors(java.lang.Object[] interceptors)
Supported interceptor types are HandlerInterceptor and WebRequestInterceptor. Each given WebRequestInterceptor will be wrapped in a WebRequestHandlerInterceptorAdapter.
interceptors
- array of handler interceptors, or null
if noneadaptInterceptor(java.lang.Object)
,
HandlerInterceptor
,
WebRequestInterceptor
public void setApplyWebRequestInterceptorsToRenderPhaseOnly(boolean applyWebRequestInterceptorsToRenderPhaseOnly)
Default is "true", since WebRequestInterceptors are usually built for MVC-style handler execution plus rendering process (which is, for example, the primary target scenario for "Open Session in View" interceptors, offering lazy loading of persistent objects during view rendering). Set this to "false" to have WebRequestInterceptors apply to the action phase as well (for example, in case of an "Open Session in View" interceptor, to allow for lazy loading outside of a transaction during the action phase).
protected void initApplicationContext() throws BeansException
initApplicationContext
in class ApplicationObjectSupport
ApplicationContextException
- in case of initialization errorsBeansException
- if thrown by ApplicationContext methodsextendInterceptors(java.util.List)
,
initInterceptors()
protected void extendInterceptors(java.util.List interceptors)
setInterceptors(java.lang.Object[])
).
Will be invoked before initInterceptors()
adapts the specified
interceptors into HandlerInterceptor
instances.
The default implementation is empty.
interceptors
- the configured interceptor List (never null
),
allowing to add further interceptors before as well as after the existing
interceptorsprotected void initInterceptors()
protected HandlerInterceptor adaptInterceptor(java.lang.Object interceptor)
Supported interceptor types are HandlerInterceptor and WebRequestInterceptor. Each given WebRequestInterceptor will be wrapped in a WebRequestHandlerInterceptorAdapter. Can be overridden in subclasses.
interceptor
- the specified interceptor objectsetApplyWebRequestInterceptorsToRenderPhaseOnly(boolean)
,
HandlerInterceptor
,
WebRequestInterceptor
,
WebRequestHandlerInterceptorAdapter
protected final HandlerInterceptor[] getAdaptedInterceptors()
null
if nonepublic final HandlerExecutionChain getHandler(PortletRequest request) throws java.lang.Exception
getHandler
in interface HandlerMapping
request
- current portlet requestjava.lang.Exception
- if there is an internal errorgetHandlerInternal(PortletRequest)
protected abstract java.lang.Object getHandlerInternal(PortletRequest request) throws java.lang.Exception
null
if no
specific one is found. This method is called by getHandler(PortletRequest)
;
a null
return value will lead to the default handler, if one is set.
Note: This method may also return a pre-built HandlerExecutionChain
,
combining a handler object with dynamically determined interceptors.
Statically specified interceptors will get merged into such an existing chain.
request
- current portlet requestnull
if none foundjava.lang.Exception
- if there is an internal errorgetHandler(PortletRequest)
protected HandlerExecutionChain getHandlerExecutionChain(java.lang.Object handler, PortletRequest request)
The default implementation simply builds a standard HandlerExecutionChain with the given handler and this handler mapping's common interceptors. Subclasses may override this in order to extend/rearrange the list of interceptors.
NOTE: The passed-in handler object may be a raw handler or a pre-built HandlerExecutionChain. This method should handle those two cases explicitly, either building a new HandlerExecutionChain or extending the existing chain.
For simply adding an interceptor, consider calling super.getHandlerExecutionChain
and invoking HandlerExecutionChain.addInterceptor(org.springframework.web.portlet.HandlerInterceptor)
on the returned chain object.
handler
- the resolved handler instance (never null
)request
- current portlet requestnull
)getAdaptedInterceptors()