Checking for navigation rule

Even though you would have to cast it, I believe these
methods are now
public on the NavigationHandlerImpl of myfaces

On 8/31/07, David Brunette <David.Brunettechordiant.com> wrote:
>
>
>
>
>
>
>      Hi everybody.
>
>
>
>      Is there an easy way for an action method to check
for the existence of
> a navigation rule before returning the outcome String? 
I know that the
> normal functionality is that, if you return an outcome
that does not match
> to an existing navigation rule, the same view will be
shown again.  But I'd
> like to check for that nav rule before returning from
the action method so I
> can go do something else instead of just showing the
same page again.
>
>
>
>      I've done something like the following, but this
doesn't seem to be the
> most efficient since I'd be creating the ViewRoot once
in handleNavigation()
> and then again when I return the outcome.
>
>
>
> public String actionMethod() {
>
>    String outcome = "someOutcome";
>
>    UIViewRoot oldView = facesContext.getViewRoot();
>
>
>
facesContext.getApplication().getNavigationHandler().handleN
avigation(
> facesContext, null, outcome );
>
>    if( facesContext.getViewRoot() == oldRoot ) {
>
>       // No nav rule found, do something else…
>
>       outcome = getOutcomeFromElsewhere();
>
>    }
>
>    return outcome;
>
> }
>
>
>
>      Any alternatives?  Thanks…
>
>
>
> Dave
> The information transmitted herewith is sensitive
information of Chordiant
> Software or its customers and is intended only for use
to the individual or
> entity to which it is addressed. If the reader of this
message is not the
> intended recipient, you are hereby notified that any
review, retransmission,
> dissemination, distribution, copying or other use of,
or taking of any
> action in reliance upon, this information is strictly
prohibited. If you
> have received this communication in error, please
contact the sender and
> delete the material from your computer.

This is complete guesswork, but what about extending
navigationHandler
and installing a custom navigation handler?   You could then
make the
default behavior of your navigation handler to get outcomes
from
somewhere else, perhaps by setting
navigationHandler.setFallBackOutcomeCallback(Method method),
 or
perhaps caching the ViewRoot if you query for whether
there's an
outcome and reusing it on the "real" invocation.


On 8/31/07, David Brunette <David.Brunettechordiant.com> wrote:
>
>
>
>
>
>
>      Hi everybody.
>
>
>
>      Is there an easy way for an action method to check
for the existence of
> a navigation rule before returning the outcome String? 
I know that the
> normal functionality is that, if you return an outcome
that does not match
> to an existing navigation rule, the same view will be
shown again.  But I'd
> like to check for that nav rule before returning from
the action method so I
> can go do something else instead of just showing the
same page again.
>
>
>
>      I've done something like the following, but this
doesn't seem to be the
> most efficient since I'd be creating the ViewRoot once
in handleNavigation()
> and then again when I return the outcome.
>
>
>
> public String actionMethod() {
>
>    String outcome = "someOutcome";
>
>    UIViewRoot oldView = facesContext.getViewRoot();
>
>
>
facesContext.getApplication().getNavigationHandler().handleN
avigation(
> facesContext, null, outcome );
>
>    if( facesContext.getViewRoot() == oldRoot ) {
>
>       // No nav rule found, do something else…
>
>       outcome = getOutcomeFromElsewhere();
>
>    }
>
>    return outcome;
>
> }
>
>
>
>      Any alternatives?  Thanks…
>
>
>
> Dave
> The information transmitted herewith is sensitive
information of Chordiant
> Software or its customers and is intended only for use
to the individual or
> entity to which it is addressed. If the reader of this
message is not the
> intended recipient, you are hereby notified that any
review, retransmission,
> dissemination, distribution, copying or other use of,
or taking of any
> action in reliance upon, this information is strictly
prohibited. If you
> have received this communication in error, please
contact the sender and
> delete the material from your computer.

     It seems as though I'd be looking at having my own
extended
NavigationHandler.  I was hoping to avoid that... didn't
know if there
was something else out there that I was just missing.

     Thanks guys.

Dave

-----Original Message-----
From: Mike Kienenberger [mailto:mkienenbgmail.com] 
Sent: Friday, August 31, 2007 11:31 AM
To: MyFaces Discussion
Subject: Re: Checking for navigation rule

This is complete guesswork, but what about extending
navigationHandler
and installing a custom navigation handler?   You could then
make the
default behavior of your navigation handler to get outcomes
from
somewhere else, perhaps by setting
navigationHandler.setFallBackOutcomeCallback(Method method),
 or
perhaps caching the ViewRoot if you query for whether
there's an
outcome and reusing it on the "real" invocation.


On 8/31/07, David Brunette <David.Brunettechordiant.com> wrote:
>
>
>
>
>
>
>      Hi everybody.
>
>
>
>      Is there an easy way for an action method to check
for the
existence of
> a navigation rule before returning the outcome String? 
I know that
the
> normal functionality is that, if you return an outcome
that does not
match
> to an existing navigation rule, the same view will be
shown again.
But I'd
> like to check for that nav rule before returning from
the action
method so I
> can go do something else instead of just showing the
same page again.
>
>
>
>      I've done something like the following, but this
doesn't seem to
be the
> most efficient since I'd be creating the ViewRoot once
in
handleNavigation()
> and then again when I return the outcome.
>
>
>
> public String actionMethod() {
>
>    String outcome = "someOutcome";
>
>    UIViewRoot oldView = facesContext.getViewRoot();
>
>
>
facesContext.getApplication().getNavigationHandler().handleN
avigation(
> facesContext, null, outcome );
>
>    if( facesContext.getViewRoot() == oldRoot ) {
>
>       // No nav rule found, do something else...
>
>       outcome = getOutcomeFromElsewhere();
>
>    }
>
>    return outcome;
>
> }
>
>
>
>      Any alternatives?  Thanks...
>
>
>
> Dave
> The information transmitted herewith is sensitive
information of
Chordiant
> Software or its customers and is intended only for use
to the
individual or
> entity to which it is addressed. If the reader of this
message is not
the
> intended recipient, you are hereby notified that any
review,
retransmission,
> dissemination, distribution, copying or other use of,
or taking of any
> action in reliance upon, this information is strictly
prohibited. If
you
> have received this communication in error, please
contact the sender
and
> delete the material from your computer.
The information transmitted herewith is sensitive     
information of Chordiant Software or its customers and is
intended only for use to the individual or entity to which
it is addressed. If the reader of this message is not the
intended recipient, you are hereby notified that any review,
retransmission, dissemination, distribution, copying or
other use of, or taking of any action in reliance upon, this
information is strictly prohibited. If you have received
this communication in error, please contact the sender and
delete the material from your computer.