facelets valueExpression always as String?

[jbegham]

Hi all,

actually I am facing the following problem: I have moved an existing JSF
project to facelets. Within the project there are "old" JSF custom tags
which I can use without problems in the new facelets environment as long as
all my expressions belong to be Strings.

As my custom components have attributes different to Strings I have not
found  a solution to access them.

My custom tag:
<jb:eventplanner event="#{event}"/>

So there it is, my attribute event which ii a
net.jb.model.businessobjects.Event class. Again: my old Tags were working.

Now in my renderer class, I just access the valueexpression by

ValueExpression ve = component.getValueExpression("event");

If I just have a look to ve.getExpectedType() this returns String. Not good!

I just inspect the String in the debugger and, surprise, my whole Object is
there as a String. Not sure whether this is a serialized kind of my object
or something like this.

Event ( net.jb.model.businessobjects.Event@b3d2d92d  |  date =
java.util.GregorianCalendar[time=1247133600000,areFieldsSet=true,areAllField
sSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Europe/Berlin",of
fset=3600000,dstSavings=3600000,useDaylight=true,transitions=143,lastRule=ja
va.util.SimpleTimeZone[id=Europe/Berlin,offset=3600000,dstSavings=3600000,us
eDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWe
ek=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDay
OfWeek=1,endTime=3600000,endTimeMode=2]],firstDayOfWeek=2,minimalDaysInFirst
Week=4,ERA=1,YEAR=2009,MONTH=6,WEEK_OF_YEAR=28,WEEK_OF_MONTH=2,DAY_OF_MONTH=
9,DAY_OF_YEAR=190,DAY_OF_WEEK=5,DAY_OF_WEEK_IN_MONTH=2,AM_PM=1,HOUR=0,HOUR_O
F_DAY=12,MINUTE=0,SECOND=0,MILLISECOND=0,ZONE_OFFSET=3600000,DST_OFFSET=3600
000]  |  hotelOptionFlag = true  |  id = 2  |  identifier = DANCING |
mainEvent = null  |  showInOverviewFlag = true  |   )


So
ve.getValue(context.getELContext());

will give me always a String :-(

Can anyone explain me, how to access my "real" object. I have absolutely now
ideas left.

Thanks in advance
John


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[Mike_]

Hi

Are you sure it is a String?

From the info you supplied it looks like an Event object, or? (net.jb.model.businessobjects.

Event@b3d2d92d).

Are you getting class cast exceptions or something?

Afraid I can't help much just thought I'd post this little observation, on the off chance it helps ;)

- Micke

2009/6/28 John Begham <jebe@...>

Hi all,

actually I am facing the following problem: I have moved an existing JSF
project to facelets. Within the project there are "old" JSF custom tags
which I can use without problems in the new facelets environment as long as
all my expressions belong to be Strings.

As my custom components have attributes different to Strings I have not
found  a solution to access them.

My custom tag:
<jb:eventplanner event="#{event}"/>

So there it is, my attribute event which ii a
net.jb.model.businessobjects.Event class. Again: my old Tags were working.

Now in my renderer class, I just access the valueexpression by

ValueExpression ve = component.getValueExpression("event");

If I just have a look to ve.getExpectedType() this returns String. Not good!

I just inspect the String in the debugger and, surprise, my whole Object is
there as a String. Not sure whether this is a serialized kind of my object
or something like this.

Event ( net.jb.model.businessobjects.Event@b3d2d92d  |  date =
java.util.GregorianCalendar[time=1247133600000,areFieldsSet=true,areAllField
sSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Europe/Berlin",of
fset=3600000,dstSavings=3600000,useDaylight=true,transitions=143,lastRule=ja
va.util.SimpleTimeZone[id=Europe/Berlin,offset=3600000,dstSavings=3600000,us
eDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWe
ek=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDay
OfWeek=1,endTime=3600000,endTimeMode=2]],firstDayOfWeek=2,minimalDaysInFirst
Week=4,ERA=1,YEAR=2009,MONTH=6,WEEK_OF_YEAR=28,WEEK_OF_MONTH=2,DAY_OF_MONTH=
9,DAY_OF_YEAR=190,DAY_OF_WEEK=5,DAY_OF_WEEK_IN_MONTH=2,AM_PM=1,HOUR=0,HOUR_O
F_DAY=12,MINUTE=0,SECOND=0,MILLISECOND=0,ZONE_OFFSET=3600000,DST_OFFSET=3600
000]  |  hotelOptionFlag = true  |  id = 2  |  identifier = DANCING |
mainEvent = null  |  showInOverviewFlag = true  |   )


So
ve.getValue(context.getELContext());

will give me always a String :-(

Can anyone explain me, how to access my "real" object. I have absolutely now
ideas left.

Thanks in advance
John


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[jbegham]

Some parts of this message have been removed. Learn more about Nabble's security policy.

Hi,

 

thanks for the replay. Yes, it is a String and I do get a Class Cast Exception if I try to cast to Event, that says "cannot cast from String to Event".

 

That drives me crazy!

 

Cheers

John

 

Von: Mikael Andersson [mailto:mail.micke@...]
Gesendet: Montag, 29. Juni 2009 17:55
An: users@...et
Betreff: Re: facelets valueExpression always as String?

 

Hi

Are you sure it is a String?

From the info you supplied it looks like an Event object, or? (net.jb.model.businessobjects.

Event@b3d2d92d).

Are you getting class cast exceptions or something?

Afraid I can't help much just thought I'd post this little observation, on the off chance it helps ;)

- Micke

 

2009/6/28 John Begham <jebe@...>

Hi all,

actually I am facing the following problem: I have moved an existing JSF
project to facelets. Within the project there are "old" JSF custom tags
which I can use without problems in the new facelets environment as long as
all my expressions belong to be Strings.

As my custom components have attributes different to Strings I have not
found  a solution to access them.

My custom tag:
<jb:eventplanner event="#{event}"/>

So there it is, my attribute event which ii a
net.jb.model.businessobjects.Event class. Again: my old Tags were working.

Now in my renderer class, I just access the valueexpression by

ValueExpression ve = component.getValueExpression("event");

If I just have a look to ve.getExpectedType() this returns String. Not good!

I just inspect the String in the debugger and, surprise, my whole Object is
there as a String. Not sure whether this is a serialized kind of my object
or something like this.

Event ( net.jb.model.businessobjects.Event@b3d2d92d  |  date =
java.util.GregorianCalendar[time=1247133600000,areFieldsSet=true,areAllField
sSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Europe/Berlin",of
fset=3600000,dstSavings=3600000,useDaylight=true,transitions=143,lastRule=ja
va.util.SimpleTimeZone[id=Europe/Berlin,offset=3600000,dstSavings=3600000,us
eDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWe
ek=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDay
OfWeek=1,endTime=3600000,endTimeMode=2]],firstDayOfWeek=2,minimalDaysInFirst
Week=4,ERA=1,YEAR=2009,MONTH=6,WEEK_OF_YEAR=28,WEEK_OF_MONTH=2,DAY_OF_MONTH=
9,DAY_OF_YEAR=190,DAY_OF_WEEK=5,DAY_OF_WEEK_IN_MONTH=2,AM_PM=1,HOUR=0,HOUR_O
F_DAY=12,MINUTE=0,SECOND=0,MILLISECOND=0,ZONE_OFFSET=3600000,DST_OFFSET=3600
000]  |  hotelOptionFlag = true  |  id = 2  |  identifier = DANCING |
mainEvent = null  |  showInOverviewFlag = true  |   )


So
ve.getValue(context.getELContext());

will give me always a String :-(

Can anyone explain me, how to access my "real" object. I have absolutely now
ideas left.

Thanks in advance
John


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[Dominik Dorn]

Could you post the rest of your rendering class? I tried something
similar a week ago, but did it with a taghandler resolving the value
and setting it as value for the renderer to render only. I think I
came across some other ways to access the value like
faceletsContext.getFacesContext().getELContext().getVariableResolver()...getValueExpression(uiComponent,


does this code work for you?
ValueExpression ve =
faceletContext.getExpressionFactory().createValueExpression(faceletContext.getFacesContext().getELContext(),
name, Event.class);

Event myEvent = ve.getValue(face(lets|es i don't know)context.getELContext());

?

Regards,
Dominik


On Mon, Jun 29, 2009 at 7:51 PM, John Begham<jebe@...> wrote:

> Hi,
>
>
>
> thanks for the replay. Yes, it is a String and I do get a Class Cast
> Exception if I try to cast to Event, that says "cannot cast from String to
> Event".
>
>
>
> That drives me crazy!
>
>
>
> Cheers
>
> John
>
>
>
> Von: Mikael Andersson [mailto:mail.micke@...]
> Gesendet: Montag, 29. Juni 2009 17:55
> An: users@...
> Betreff: Re: facelets valueExpression always as String?
>
>
>
> Hi
>
> Are you sure it is a String?
>
> From the info you supplied it looks like an Event object, or?
> (net.jb.model.businessobjects.
>
> Event@b3d2d92d).
>
> Are you getting class cast exceptions or something?
>
> Afraid I can't help much just thought I'd post this little observation, on
> the off chance it helps ;)
>
> - Micke
>
>
>
> 2009/6/28 John Begham <jebe@...>
>
> Hi all,
>
> actually I am facing the following problem: I have moved an existing JSF
> project to facelets. Within the project there are "old" JSF custom tags
> which I can use without problems in the new facelets environment as long as
> all my expressions belong to be Strings.
>
> As my custom components have attributes different to Strings I have not
> found  a solution to access them.
>
> My custom tag:
> <jb:eventplanner event="#{event}"/>
>
> So there it is, my attribute event which ii a
> net.jb.model.businessobjects.Event class. Again: my old Tags were working.
>
> Now in my renderer class, I just access the valueexpression by
>
> ValueExpression ve = component.getValueExpression("event");
>
> If I just have a look to ve.getExpectedType() this returns String. Not good!
>
> I just inspect the String in the debugger and, surprise, my whole Object is
> there as a String. Not sure whether this is a serialized kind of my object
> or something like this.
>
> Event ( net.jb.model.businessobjects.Event@b3d2d92d  |  date =
> java.util.GregorianCalendar[time=1247133600000,areFieldsSet=true,areAllField
> sSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Europe/Berlin",of
> fset=3600000,dstSavings=3600000,useDaylight=true,transitions=143,lastRule=ja
> va.util.SimpleTimeZone[id=Europe/Berlin,offset=3600000,dstSavings=3600000,us
> eDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWe
> ek=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDay
> OfWeek=1,endTime=3600000,endTimeMode=2]],firstDayOfWeek=2,minimalDaysInFirst
> Week=4,ERA=1,YEAR=2009,MONTH=6,WEEK_OF_YEAR=28,WEEK_OF_MONTH=2,DAY_OF_MONTH=
> 9,DAY_OF_YEAR=190,DAY_OF_WEEK=5,DAY_OF_WEEK_IN_MONTH=2,AM_PM=1,HOUR=0,HOUR_O
> F_DAY=12,MINUTE=0,SECOND=0,MILLISECOND=0,ZONE_OFFSET=3600000,DST_OFFSET=3600
> 000]  |  hotelOptionFlag = true  |  id = 2  |  identifier = DANCING |
> mainEvent = null  |  showInOverviewFlag = true  |   )
>
>
> So
> ve.getValue(context.getELContext());
>
> will give me always a String :-(
>
> Can anyone explain me, how to access my "real" object. I have absolutely now
> ideas left.
>
> Thanks in advance
> John
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@...
> For additional commands, e-mail: users-help@...
>
>

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