RE: Component to format null values
I think you can use the format:
t:formatnull value=${contract?.manager?.address?.city?.name} /
... where if any of the hierarchy is null is will stop trying to evaluate
methods / properties on subordinates, avoiding your NPE.
Regards,
Jim.
-Original Message-
From: Dmitriy Vsekhvalnov [mailto:dvsekhval...@gmail.com]
Sent: 14 October 2010 09:01
To: users@tapestry.apache.org
Subject: Component to format null values
Hello all,
i'm looking to some approach to render property value or some default string
if value is null.
Something like:
t:formatnull value=contract.name /
I have no problem to implement such component,but i want this to work with
property chains as well:
t:formatnull value=contract.manager.address.city.name /
where i want default string to be rendered, if any of intermediate values
evaluated to null. Now i'm getting NPE.
Is there are any service in tapestry which i can use for property
expressions evaluation or any other ideas?
Thanks.
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Re: Component to format null values
Excuse me, I'm not questioning the functioning of your mentioned solution
but where in the documentation is that ? I wanna read more about this.
Thanks
On Thu, Oct 14, 2010 at 10:21 AM, Jim O'Callaghan jc1000...@yahoo.co.ukwrote:
I think you can use the format:
t:formatnull value=${contract?.manager?.address?.city?.name} /
... where if any of the hierarchy is null is will stop trying to evaluate
methods / properties on subordinates, avoiding your NPE.
Regards,
Jim.
-Original Message-
From: Dmitriy Vsekhvalnov [mailto:dvsekhval...@gmail.com]
Sent: 14 October 2010 09:01
To: users@tapestry.apache.org
Subject: Component to format null values
Hello all,
i'm looking to some approach to render property value or some default
string
if value is null.
Something like:
t:formatnull value=contract.name /
I have no problem to implement such component,but i want this to work with
property chains as well:
t:formatnull value=contract.manager.address.city.name /
where i want default string to be rendered, if any of intermediate values
evaluated to null. Now i'm getting NPE.
Is there are any service in tapestry which i can use for property
expressions evaluation or any other ideas?
Thanks.
-
To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org
For additional commands, e-mail: users-h...@tapestry.apache.org
--
*Regards,*
*Muhammad Gelbana
Java Software Programmer*
Re: Component to format null values
http://tapestry.apache.org/tapestry5.1/guide/propexp.html
The safe dereference operator
On Thu, Oct 14, 2010 at 12:03, Muhammad Mohsen m.gelb...@gmail.com wrote:
Excuse me, I'm not questioning the functioning of your mentioned solution
but where in the documentation is that ? I wanna read more about this.
Thanks
On Thu, Oct 14, 2010 at 10:21 AM, Jim O'Callaghan
jc1000...@yahoo.co.ukwrote:
I think you can use the format:
t:formatnull value=${contract?.manager?.address?.city?.name} /
... where if any of the hierarchy is null is will stop trying to evaluate
methods / properties on subordinates, avoiding your NPE.
Regards,
Jim.
-Original Message-
From: Dmitriy Vsekhvalnov [mailto:dvsekhval...@gmail.com]
Sent: 14 October 2010 09:01
To: users@tapestry.apache.org
Subject: Component to format null values
Hello all,
i'm looking to some approach to render property value or some default
string
if value is null.
Something like:
t:formatnull value=contract.name /
I have no problem to implement such component,but i want this to work with
property chains as well:
t:formatnull value=contract.manager.address.city.name /
where i want default string to be rendered, if any of intermediate values
evaluated to null. Now i'm getting NPE.
Is there are any service in tapestry which i can use for property
expressions evaluation or any other ideas?
Thanks.
-
To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org
For additional commands, e-mail: users-h...@tapestry.apache.org
--
*Regards,*
*Muhammad Gelbana
Java Software Programmer*
--
Andreas Andreou - andy...@apache.org - http://blog.andyhot.gr
Tapestry PMC / Tacos developer
Open Source / JEE Consulting
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RE: Component to format null values
You're welcome Dmitriy. One thing I should have said was that my example
${...} forced coercion to a String, which may / may not be required in your
case.
Regards,
Jim.
-Original Message-
From: Dmitriy Vsekhvalnov [mailto:dvsekhval...@gmail.com]
Sent: 14 October 2010 11:27
To: Tapestry users
Subject: Re: Component to format null values
you opened my eyes. Thanks.
On Thu, Oct 14, 2010 at 12:21 PM, Jim O'Callaghan
jc1000...@yahoo.co.ukwrote:
I think you can use the format:
t:formatnull value=${contract?.manager?.address?.city?.name} /
... where if any of the hierarchy is null is will stop trying to evaluate
methods / properties on subordinates, avoiding your NPE.
Regards,
Jim.
-Original Message-
From: Dmitriy Vsekhvalnov [mailto:dvsekhval...@gmail.com]
Sent: 14 October 2010 09:01
To: users@tapestry.apache.org
Subject: Component to format null values
Hello all,
i'm looking to some approach to render property value or some default
string
if value is null.
Something like:
t:formatnull value=contract.name /
I have no problem to implement such component,but i want this to work with
property chains as well:
t:formatnull value=contract.manager.address.city.name /
where i want default string to be rendered, if any of intermediate values
evaluated to null. Now i'm getting NPE.
Is there are any service in tapestry which i can use for property
expressions evaluation or any other ideas?
Thanks.
-
To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org
For additional commands, e-mail: users-h...@tapestry.apache.org
-
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