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Posted to users@tapestry.apache.org by Marcelo Lotif <ml...@gmail.com> on 2008/01/30 17:31:36 UTC
[T5] Why can't i directly access attributes from my superclass?
Hi all,
I have an attribute used by many of my pages, so i want to put it on an
abstract superclass. But, if i mark my attribute as protected or public (on
the superclass), and try to use it on my subclass directly, I get a strange
error:
An unexpected application exception has occurred.
Render queue error in BeginRender[Portal:layouterp.menuerp.pagelink_2]:
Could not convert 'incluirBtn' into a component parameter binding:
java.lang.NoClassDefFoundError:
br/com/javasoftware/erp/pages/localizar/ProcurarCliente
But, if i create getters and setters and use them in my subclass instead of
calling the attribute directly, everything works fine.
Anyone knows why this happens?
--
Atenciosamente,
Marcelo Lotif
RE: [T5] Why can't i directly access attributes from my superclass?
Posted by Mahen Perera <Ma...@igindex.co.uk>.
oops,. i misunderstood your question. sorry abt that.
i thought you were trying to access the attribute from a page ,, i.e a
.tml file
-----Original Message-----
From: Marcelo Lotif [mailto:mlotifjava@gmail.com]
Sent: 30 January 2008 17:28
To: Tapestry users
Subject: Re: [T5] Why can't i directly access attributes from my
superclass?
I'm using 5.0.10-SNAPSHOT.
I'm not trying to access the attribute on a page, it's just a control
attribute, and i must have it in some of my classes. For me, is simpler
to declare it in a superclass and access it directly in the subclasses,
since subclasses inherit the attributes from the superclass. But it's
not so bad to use it via getters and setters.
=)
2008/1/30, Mahen Perera <Ma...@igindex.co.uk>:
>
> From what i know, you need to have a getter for each attribute that
> you are trying to access in the page. This is the way tapestry works
> AFAIK
>
> HTH
>
> Mahen
>
> -----Original Message-----
> From: Marcelo Lotif [mailto:mlotifjava@gmail.com]
> Sent: 30 January 2008 16:32
> To: Tapestry users
> Subject: [T5] Why can't i directly access attributes from my
superclass?
>
> Hi all,
> I have an attribute used by many of my pages, so i want to put it on
> an abstract superclass. But, if i mark my attribute as protected or
> public (on the superclass), and try to use it on my subclass directly,
> I get a strange
> error:
>
> An unexpected application exception has occurred.
>
> Render queue error in
BeginRender[Portal:layouterp.menuerp.pagelink_2]:
> Could not convert 'incluirBtn' into a component parameter binding:
> java.lang.NoClassDefFoundError:
> br/com/javasoftware/erp/pages/localizar/ProcurarCliente
>
> But, if i create getters and setters and use them in my subclass
> instead of calling the attribute directly, everything works fine.
> Anyone knows why this happens?
>
> --
> Atenciosamente,
> Marcelo Lotif
> The information contained in this email is strictly confidential and
> for the use of the addressee only, unless otherwise indicated. If you
> are not the intended recipient, please do not read, copy, use or
> disclose to others this message or any attachment. Please also notify
> the sender by replying to this email or by telephone (+44 (0)20 7896
> 0011) and then delete the email and any copies of it. Opinions,
> conclusions (etc.) that do not relate to the official business of this
> company shall be understood as neither given nor endorsed by it. IG
> Index plc is a company registered in England and Wales under number
> 01190902. VAT registration number 761 2978 07. Registered
> Office: Friars House, 157-168 Blackfriars Road, London SE1 8EZ.
> Authorised and regulated by the Financial Services Authority. FSA
> Register number 114059.
>
> ---------------------------------------------------------------------
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>
>
--
Atenciosamente,
Marcelo Lotif
The information contained in this email is strictly confidential and for the use of the addressee only, unless otherwise indicated. If you are not the intended recipient, please do not read, copy, use or disclose to others this message or any attachment. Please also notify the sender by replying to this email or by telephone (+44 (0)20 7896 0011) and then delete the email and any copies of it. Opinions, conclusions (etc.) that do not relate to the official business of this company shall be understood as neither given nor endorsed by it. IG Index plc is a company registered in England and Wales under number 01190902. VAT registration number 761 2978 07. Registered Office: Friars House, 157-168 Blackfriars Road, London SE1 8EZ. Authorised and regulated by the Financial Services Authority. FSA Register number 114059.
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Re: [T5] Why can't i directly access attributes from my superclass?
Posted by Daniel Jue <te...@gmail.com>.
Don't worry, you're not the only one who encountered this problem the hard
way. ;-)
Time to add this to the wiki, since Early T5 adopters will likely run into
this.
http://wiki.apache.org/tapestry/Tapestry5Caveats
On Jan 30, 2008 12:27 PM, Marcelo Lotif <ml...@gmail.com> wrote:
> I'm using 5.0.10-SNAPSHOT.
> I'm not trying to access the attribute on a page, it's just a control
> attribute, and i must have it in some of my classes. For me, is simpler to
> declare it in a superclass and access it directly in the subclasses, since
> subclasses inherit the attributes from the superclass. But it's not so bad
> to use it via getters and setters.
>
> =)
>
> 2008/1/30, Mahen Perera <Ma...@igindex.co.uk>:
> >
> > From what i know, you need to have a getter for each attribute that you
> > are trying to access in the page. This is the way tapestry works AFAIK
> >
> > HTH
> >
> > Mahen
> >
> > -----Original Message-----
> > From: Marcelo Lotif [mailto:mlotifjava@gmail.com]
> > Sent: 30 January 2008 16:32
> > To: Tapestry users
> > Subject: [T5] Why can't i directly access attributes from my superclass?
> >
> > Hi all,
> > I have an attribute used by many of my pages, so i want to put it on an
> > abstract superclass. But, if i mark my attribute as protected or public
> > (on the superclass), and try to use it on my subclass directly, I get a
> > strange
> > error:
> >
> > An unexpected application exception has occurred.
> >
> > Render queue error in BeginRender[Portal:layouterp.menuerp.pagelink_2]:
> > Could not convert 'incluirBtn' into a component parameter binding:
> > java.lang.NoClassDefFoundError:
> > br/com/javasoftware/erp/pages/localizar/ProcurarCliente
> >
> > But, if i create getters and setters and use them in my subclass instead
> > of calling the attribute directly, everything works fine.
> > Anyone knows why this happens?
> >
> > --
> > Atenciosamente,
> > Marcelo Lotif
> > The information contained in this email is strictly confidential and for
> > the use of the addressee only, unless otherwise indicated. If you are
> not
> > the intended recipient, please do not read, copy, use or disclose to
> others
> > this message or any attachment. Please also notify the sender by
> replying to
> > this email or by telephone (+44 (0)20 7896 0011) and then delete the
> email
> > and any copies of it. Opinions, conclusions (etc.) that do not relate to
> the
> > official business of this company shall be understood as neither given
> nor
> > endorsed by it. IG Index plc is a company registered in England and
> Wales
> > under number 01190902. VAT registration number 761 2978 07. Registered
> > Office: Friars House, 157-168 Blackfriars Road, London SE1 8EZ.
> Authorised
> > and regulated by the Financial Services Authority. FSA Register number
> > 114059.
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> > For additional commands, e-mail: users-help@tapestry.apache.org
> >
> >
>
>
> --
> Atenciosamente,
> Marcelo Lotif
>
Re: [T5] Why can't i directly access attributes from my superclass?
Posted by Marcelo Lotif <ml...@gmail.com>.
I'm using 5.0.10-SNAPSHOT.
I'm not trying to access the attribute on a page, it's just a control
attribute, and i must have it in some of my classes. For me, is simpler to
declare it in a superclass and access it directly in the subclasses, since
subclasses inherit the attributes from the superclass. But it's not so bad
to use it via getters and setters.
=)
2008/1/30, Mahen Perera <Ma...@igindex.co.uk>:
>
> From what i know, you need to have a getter for each attribute that you
> are trying to access in the page. This is the way tapestry works AFAIK
>
> HTH
>
> Mahen
>
> -----Original Message-----
> From: Marcelo Lotif [mailto:mlotifjava@gmail.com]
> Sent: 30 January 2008 16:32
> To: Tapestry users
> Subject: [T5] Why can't i directly access attributes from my superclass?
>
> Hi all,
> I have an attribute used by many of my pages, so i want to put it on an
> abstract superclass. But, if i mark my attribute as protected or public
> (on the superclass), and try to use it on my subclass directly, I get a
> strange
> error:
>
> An unexpected application exception has occurred.
>
> Render queue error in BeginRender[Portal:layouterp.menuerp.pagelink_2]:
> Could not convert 'incluirBtn' into a component parameter binding:
> java.lang.NoClassDefFoundError:
> br/com/javasoftware/erp/pages/localizar/ProcurarCliente
>
> But, if i create getters and setters and use them in my subclass instead
> of calling the attribute directly, everything works fine.
> Anyone knows why this happens?
>
> --
> Atenciosamente,
> Marcelo Lotif
> The information contained in this email is strictly confidential and for
> the use of the addressee only, unless otherwise indicated. If you are not
> the intended recipient, please do not read, copy, use or disclose to others
> this message or any attachment. Please also notify the sender by replying to
> this email or by telephone (+44 (0)20 7896 0011) and then delete the email
> and any copies of it. Opinions, conclusions (etc.) that do not relate to the
> official business of this company shall be understood as neither given nor
> endorsed by it. IG Index plc is a company registered in England and Wales
> under number 01190902. VAT registration number 761 2978 07. Registered
> Office: Friars House, 157-168 Blackfriars Road, London SE1 8EZ. Authorised
> and regulated by the Financial Services Authority. FSA Register number
> 114059.
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
> For additional commands, e-mail: users-help@tapestry.apache.org
>
>
--
Atenciosamente,
Marcelo Lotif
RE: [T5] Why can't i directly access attributes from my superclass?
Posted by Mahen Perera <Ma...@igindex.co.uk>.
>From what i know, you need to have a getter for each attribute that you
are trying to access in the page. This is the way tapestry works AFAIK
HTH
Mahen
-----Original Message-----
From: Marcelo Lotif [mailto:mlotifjava@gmail.com]
Sent: 30 January 2008 16:32
To: Tapestry users
Subject: [T5] Why can't i directly access attributes from my superclass?
Hi all,
I have an attribute used by many of my pages, so i want to put it on an
abstract superclass. But, if i mark my attribute as protected or public
(on the superclass), and try to use it on my subclass directly, I get a
strange
error:
An unexpected application exception has occurred.
Render queue error in BeginRender[Portal:layouterp.menuerp.pagelink_2]:
Could not convert 'incluirBtn' into a component parameter binding:
java.lang.NoClassDefFoundError:
br/com/javasoftware/erp/pages/localizar/ProcurarCliente
But, if i create getters and setters and use them in my subclass instead
of calling the attribute directly, everything works fine.
Anyone knows why this happens?
--
Atenciosamente,
Marcelo Lotif
The information contained in this email is strictly confidential and for the use of the addressee only, unless otherwise indicated. If you are not the intended recipient, please do not read, copy, use or disclose to others this message or any attachment. Please also notify the sender by replying to this email or by telephone (+44 (0)20 7896 0011) and then delete the email and any copies of it. Opinions, conclusions (etc.) that do not relate to the official business of this company shall be understood as neither given nor endorsed by it. IG Index plc is a company registered in England and Wales under number 01190902. VAT registration number 761 2978 07. Registered Office: Friars House, 157-168 Blackfriars Road, London SE1 8EZ. Authorised and regulated by the Financial Services Authority. FSA Register number 114059.
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Re: [T5] Why can't i directly access attributes from my superclass?
Posted by Howard Lewis Ship <hl...@gmail.com>.
You'll see an explanation in the console. I suspect you are using a
slightly older Tapestry preview release; more recently, this situation
is an error. Because of how Tapestry instruments your code, instance
variables must be private.
On Jan 30, 2008 8:31 AM, Marcelo Lotif <ml...@gmail.com> wrote:
> Hi all,
> I have an attribute used by many of my pages, so i want to put it on an
> abstract superclass. But, if i mark my attribute as protected or public (on
> the superclass), and try to use it on my subclass directly, I get a strange
> error:
>
> An unexpected application exception has occurred.
>
> Render queue error in BeginRender[Portal:layouterp.menuerp.pagelink_2]:
> Could not convert 'incluirBtn' into a component parameter binding:
> java.lang.NoClassDefFoundError:
> br/com/javasoftware/erp/pages/localizar/ProcurarCliente
>
> But, if i create getters and setters and use them in my subclass instead of
> calling the attribute directly, everything works fine.
> Anyone knows why this happens?
>
> --
> Atenciosamente,
> Marcelo Lotif
>
--
Howard M. Lewis Ship
Creator Apache Tapestry and Apache HiveMind
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