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Posted to users@myfaces.apache.org by Rønnevik,
Eivind <ei...@kadme.com> on 2007/05/31 14:23:30 UTC
Change valueBinding of t:dataTable based on condition
Hi!
I was just curious, is there any way I can change the value of a dataTable based on different conditions?
I'll try to give a simple example to explain what I want. :)
Let's say I use the graphicImage tag, in the value property I could either write the path to the image
<t:graphicImage value="/images/myImage.gif"
Or I can use an expression that returns a String pointing to the image
<t:graphicImage value#{myBean.pathToImage}"
I have the need of using the same jsp twice, but based on a boolean property the datasource for the dataTable on this page would differ.
Theoretically, this way of setting the value-property would represent what I would want to do:
<t:dataTable value="#{myBean.boolean ? '#{oneBean.dataModel}' : '#{ anotherBean.dataModel}'}"
This would work if the value property expected a String, but instead it expects an expression that directly points to a collection of some sort.
I also tried to point to a method in my bean that returns the correct value-string based on the Boolean:
<t:dataTable value="#{myBean.tableValue
where the getTableValue-method is like this:
public String getTableValue()
{
if(condition)
return "#{oneBean.dataModel}";
return "#{anotherBean.dataModel}";
}
But of course this fails since the dataTable expects a collection and not a String.
I know that I in my getTableValue-method can return the proper collection:
public DataModel getTableValue()
{
if(condition)
return getOneBean().getDataModel();
return getAnotherBean().getDataModel();
}
but then I would have to set the references to these other beans, and I can't do that because it would cause a cyclic reference..
So, are there other solutions to this or do I have to rethink my way of doing this? :)
Regards,
Eivind
Re: Change valueBinding of t:dataTable based on condition
Posted by Mike Kienenberger <mk...@gmail.com>.
Your understanding of value binding syntax is incorrect.
Try this:
<t:dataTable value="#{myBean.boolean ? oneBean.dataModel :
anotherBean.dataModel}"
I can't think of any reason why this won't work.
On 5/31/07, Rønnevik, Eivind <ei...@kadme.com> wrote:
>
>
>
>
> Hi!
>
>
>
> I was just curious, is there any way I can change the value of a dataTable
> based on different conditions?
>
>
>
> I'll try to give a simple example to explain what I want. :)
>
>
>
> Let's say I use the graphicImage tag, in the value property I could either
> write the path to the image
>
> <t:graphicImage value="/images/myImage.gif"
>
> Or I can use an expression that returns a String pointing to the image
>
> <t:graphicImage value#{myBean.pathToImage}"
>
>
>
> I have the need of using the same jsp twice, but based on a boolean property
> the datasource for the dataTable on this page would differ.
>
>
>
> Theoretically, this way of setting the value-property would represent what I
> would want to do:
>
>
>
> <t:dataTable value="#{myBean.boolean ? '#{oneBean.dataModel}' : '#{
> anotherBean.dataModel}'}"
>
>
>
> This would work if the value property expected a String, but instead it
> expects an expression that directly points to a collection of some sort.
>
>
>
> I also tried to point to a method in my bean that returns the correct
> value-string based on the Boolean:
>
>
>
> <t:dataTable value="#{myBean.tableValue
>
>
>
> where the getTableValue-method is like this:
>
>
>
> public String getTableValue()
>
> {
>
> if(condition)
>
> return "#{oneBean.dataModel}";
>
> return "#{anotherBean.dataModel}";
>
>
>
> }
>
>
>
> But of course this fails since the dataTable expects a collection and not a
> String.
>
>
>
>
>
>
>
> I know that I in my getTableValue-method can return the proper collection:
>
>
>
> public DataModel getTableValue()
>
> {
>
> if(condition)
>
> return getOneBean().getDataModel();
>
> return getAnotherBean().getDataModel();
>
>
>
> }
>
>
>
> but then I would have to set the references to these other beans, and I
> can't do that because it would cause a cyclic reference..
>
>
>
> So, are there other solutions to this or do I have to rethink my way of
> doing this? :)
>
>
>
> Regards,
>
>
>
> Eivind
Re: Change valueBinding of t:dataTable based on condition
Posted by er...@novartis.com.
Use the rendered attribuet.
Rønnevik, Eivind <ei...@kadme.com>
05/31/2007 08:24 AM
Please respond to
"MyFaces Discussion" <us...@myfaces.apache.org>
To
"MyFaces Discussion" <us...@myfaces.apache.org>
cc
Subject
Change valueBinding of t:dataTable based on condition
Hi!
I was just curious, is there any way I can change the value of a dataTable
based on different conditions?
I?ll try to give a simple example to explain what I want. :)
Let?s say I use the graphicImage tag, in the value property I could either
write the path to the image
<t:graphicImage value="/images/myImage.gif"
Or I can use an expression that returns a String pointing to the image
<t:graphicImage value#{myBean.pathToImage}"
I have the need of using the same jsp twice, but based on a boolean
property the datasource for the dataTable on this page would differ.
Theoretically, this way of setting the value-property would represent what
I would want to do:
<t:dataTable value="#{myBean.boolean ? '#{oneBean.dataModel}' : '#{
anotherBean.dataModel}'}"
This would work if the value property expected a String, but instead it
expects an expression that directly points to a collection of some sort.
I also tried to point to a method in my bean that returns the correct
value-string based on the Boolean:
<t:dataTable value="#{myBean.tableValue
where the getTableValue-method is like this:
public String getTableValue()
{
if(condition)
return "#{oneBean.dataModel}";
return "#{anotherBean.dataModel}";
}
But of course this fails since the dataTable expects a collection and not
a String.
I know that I in my getTableValue-method can return the proper collection:
public DataModel getTableValue()
{
if(condition)
return getOneBean().getDataModel();
return getAnotherBean().getDataModel();
}
but then I would have to set the references to these other beans, and I
can?t do that because it would cause a cyclic reference..
So, are there other solutions to this or do I have to rethink my way of
doing this? :)
Regards,
Eivind
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RE: Change valueBinding of t:dataTable based on condition
Posted by he...@dnbnor.no.
Hi
You should look at Clay in the Shale project. This is a piece of cake using symbols in Clay.
Hermod
-----Original Message-----
From: Rønnevik, Eivind [mailto:eivind@kadme.com]
Sent: Thursday, May 31, 2007 2:24 PM
To: MyFaces Discussion
Subject: Change valueBinding of t:dataTable based on condition
Hi!
I was just curious, is there any way I can change the value of a dataTable based on different conditions?
I'll try to give a simple example to explain what I want. :)
Let's say I use the graphicImage tag, in the value property I could either write the path to the image
<t:graphicImage value="/images/myImage.gif"
Or I can use an expression that returns a String pointing to the image
<t:graphicImage value#{myBean.pathToImage}"
I have the need of using the same jsp twice, but based on a boolean property the datasource for the dataTable on this page would differ.
Theoretically, this way of setting the value-property would represent what I would want to do:
<t:dataTable value="#{myBean.boolean ? '#{oneBean.dataModel}' : '#{ anotherBean.dataModel}'}"
This would work if the value property expected a String, but instead it expects an expression that directly points to a collection of some sort.
I also tried to point to a method in my bean that returns the correct value-string based on the Boolean:
<t:dataTable value="#{myBean.tableValue
where the getTableValue-method is like this:
public String getTableValue()
{
if(condition)
return "#{oneBean.dataModel}";
return "#{anotherBean.dataModel}";
}
But of course this fails since the dataTable expects a collection and not a String.
I know that I in my getTableValue-method can return the proper collection:
public DataModel getTableValue()
{
if(condition)
return getOneBean().getDataModel();
return getAnotherBean().getDataModel();
}
but then I would have to set the references to these other beans, and I can't do that because it would cause a cyclic reference..
So, are there other solutions to this or do I have to rethink my way of doing this? :)
Regards,
Eivind
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