Checking for navigation rule
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().handleNavigation(
facesContext, null, outcome );
if( facesContext.getViewRoot() == oldRoot ) {
// No nav rule found, do something else...
outcome = getOutcomeFromElsewhere();
}
return outcome;
}
Any alternatives? Thanks...
Dave
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Re: 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 [EMAIL PROTECTED] 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().handleNavigation(
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.
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 [EMAIL PROTECTED] 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().handleNavigation(
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.
RE: Checking for navigation rule
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:[EMAIL PROTECTED]
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 [EMAIL PROTECTED] 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().handleNavigation(
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.
