| org.springframework.web.jsf.DecoratingNavigationHandler
| DecoratingNavigationHandler | | abstract public class DecoratingNavigationHandler extends NavigationHandler (Code) | | Base class for JSF NavigationHandler implementations that want
to be capable of decorating an original NavigationHandler.
Supports the standard JSF style of decoration (through a constructor argument)
as well as an overloaded handleNavigation method with explicit
NavigationHandler argument (passing in the original NavigationHandler). Subclasses
are forced to implement this overloaded handleNavigation method.
Standard JSF invocations will automatically delegate to the overloaded method,
with the constructor-injected NavigationHandler as argument.
author:
Juergen Hoeller
since:
1.2.7
See Also: DelegatingNavigationHandlerProxy |
| Constructor Summary | |
| protected | DecoratingNavigationHandler()
Create a DecoratingNavigationHandler without fixed original NavigationHandler. | | protected | DecoratingNavigationHandler(NavigationHandler originalNavigationHandler)
Create a DecoratingNavigationHandler with fixed original NavigationHandler. |
| Method Summary | |
| final protected void | callNextHandlerInChain(FacesContext facesContext, String fromAction, String outcome, NavigationHandler originalNavigationHandler)
Method to be called by subclasses when intending to delegate to the next
handler in the NavigationHandler chain. | | final public NavigationHandler | getDecoratedNavigationHandler()
Return the fixed original NavigationHandler decorated by this handler, if any
(that is, if passed in through the constructor). | | final public void | handleNavigation(FacesContext facesContext, String fromAction, String outcome)
This implementation of the standard JSF handleNavigation method
delegates to the overloaded variant, passing in constructor-injected
NavigationHandler as argument. | | abstract public void | handleNavigation(FacesContext facesContext, String fromAction, String outcome, NavigationHandler originalNavigationHandler)
Special handleNavigation variant with explicit NavigationHandler
argument. |
| DecoratingNavigationHandler | | protected DecoratingNavigationHandler()(Code) | | Create a DecoratingNavigationHandler without fixed original NavigationHandler.
|
| DecoratingNavigationHandler | | protected DecoratingNavigationHandler(NavigationHandler originalNavigationHandler)(Code) | | Create a DecoratingNavigationHandler with fixed original NavigationHandler.
Parameters:
originalNavigationHandler - the original NavigationHandler to decorate |
| callNextHandlerInChain | | final protected void callNextHandlerInChain(FacesContext facesContext, String fromAction, String outcome, NavigationHandler originalNavigationHandler)(Code) | | Method to be called by subclasses when intending to delegate to the next
handler in the NavigationHandler chain. Will always call the most
appropriate next handler, either the decorated NavigationHandler passed
in as constructor argument or the original NavigationHandler as passed
into this method - according to the position of this instance in the chain.
Will call the decorated NavigationHandler specified as constructor
argument, if any. In case of a DecoratingNavigationHandler as target, the
original NavigationHandler as passed into this method will be passed on to
the next element in the chain: This ensures propagation of the original
handler that the last element in the handler chain might delegate back to.
In case of a standard NavigationHandler as target, the original handler
will simply not get passed on; no delegating back to the original is
possible further down the chain in that scenario.
If no decorated NavigationHandler specified as constructor argument,
this instance is the last element in the chain. Hence, this method will
call the original NavigationHandler as passed into this method. If no
original NavigantionHandler has been passed in (for example if this
instance is the last element in a chain with standard NavigationHandlers
as earlier elements), this method corresponds to a no-op.
Parameters:
facesContext - the current JSF context
Parameters:
fromAction - the action binding expression that was evaluated to retrieve thespecified outcome, or null if the outcome was acquired by some other means
Parameters:
outcome - the logical outcome returned by a previous invoked application action(which may be null)
Parameters:
originalNavigationHandler - the original NavigationHandler,or null if none |
| getDecoratedNavigationHandler | | final public NavigationHandler getDecoratedNavigationHandler()(Code) | | Return the fixed original NavigationHandler decorated by this handler, if any
(that is, if passed in through the constructor).
|
| handleNavigation | | abstract public void handleNavigation(FacesContext facesContext, String fromAction, String outcome, NavigationHandler originalNavigationHandler)(Code) | | Special handleNavigation variant with explicit NavigationHandler
argument. Either called directly, by code with an explicit original handler,
or called from the standard handleNavigation method, as
plain JSF-defined NavigationHandler.
Implementations should invoke callNextHandlerInChain to
delegate to the next handler in the chain. This will always call the most
appropriate next handler (see callNextHandlerInChain javadoc).
Alternatively, the decorated NavigationHandler or the passed-in original
NavigationHandler can also be called directly; however, this is not as
flexible in terms of reacting to potential positions in the chain.
Parameters:
facesContext - the current JSF context
Parameters:
fromAction - the action binding expression that was evaluated to retrieve thespecified outcome, or null if the outcome was acquired by some other means
Parameters:
outcome - the logical outcome returned by a previous invoked application action(which may be null)
Parameters:
originalNavigationHandler - the original NavigationHandler,or null if none
See Also: DecoratingNavigationHandler.callNextHandlerInChain |
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