Re: dynamic ognl expr

2006-12-31 Thread andyhot 
Check out some ognl docs for expression syntax, e.t.c.

IIRC, you can do

value="ognl:components.tableRows.tableRow[columnName]"

And happy new year from greece as well !


Martin Strand wrote:
> If you generate the expression dynamically, you can use an
> ExpressionEvaluator:
>
> public Object getValue()
> {
>   String expression = "components.tableRows.tableRow." + getColumnName();
>   return getExpressionEvaluator().read(getPage(), expression);
> }
>
> @InjectObject("service:tapestry.ognl.ExpressionEvaluator")
> public abstract ExpressionEvaluator getExpressionEvaluator();
>
> Happy new year
>
> Martin
>
> On Sun, 31 Dec 2006 18:18:29 +0100, ra <[EMAIL PROTECTED]> wrote:
>
>>
>> I'd like to read object's property value but the property name is known
>> during runtime only
>> so finally the ognl expression should looks like this
>>
>> value="ognl:components.tableRows.tableRow.clientId"
>>
>> but clientId is generated and can be read i.e. from page's property:
>> columnName
>>
>> So I'd like to write sth like this:
>> value="ognl:('components.tableRows.tableRow.' + ognl:columnName)"
>
>
>
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>
>
>


-- 
Andreas Andreou - [EMAIL PROTECTED] - http://andyhot.di.uoa.gr
Tapestry / Tacos developer
Open Source / J2EE Consulting 


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Re: dynamic ognl expr

2006-12-31 Thread Martin Strand 
If you generate the expression dynamically, you can use an  
ExpressionEvaluator:


public Object getValue()
{
  String expression = "components.tableRows.tableRow." + getColumnName();
  return getExpressionEvaluator().read(getPage(), expression);
}

@InjectObject("service:tapestry.ognl.ExpressionEvaluator")
public abstract ExpressionEvaluator getExpressionEvaluator();

Happy new year

Martin

On Sun, 31 Dec 2006 18:18:29 +0100, ra <[EMAIL PROTECTED]> wrote:



I'd like to read object's property value but the property name is known
during runtime only
so finally the ognl expression should looks like this

value="ognl:components.tableRows.tableRow.clientId"

but clientId is generated and can be read i.e. from page's property:
columnName

So I'd like to write sth like this:
value="ognl:('components.tableRows.tableRow.' + ognl:columnName)"




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Re: dynamic ognl expr

2006-12-31 Thread Daniel Tabuenca 

Seems like the wrong way to go about things. Remember, it's probably
best to avoid complex OGNL expressions. It's often best to add the
complexity to the JAVA code. For example you could have a function in
your object such that you can do getPropertyByName(columnName). And
use that to return the correct property. I am almost sure you can't
use dynamic OGNL expressions like you want since those are usually
pre-compiled.

On 12/31/06, ra <[EMAIL PROTECTED]> wrote:


I'd like to read object's property value but the property name is known
during runtime only
so finally the ognl expression should looks like this

value="ognl:components.tableRows.tableRow.clientId"

but clientId is generated and can be read i.e. from page's property:
columnName

So I'd like to write sth like this:
value="ognl:('components.tableRows.tableRow.' + ognl:columnName)"
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dynamic ognl expr

2006-12-31 Thread ra 

I'd like to read object's property value but the property name is known
during runtime only
so finally the ognl expression should looks like this

value="ognl:components.tableRows.tableRow.clientId"

but clientId is generated and can be read i.e. from page's property:
columnName 

So I'd like to write sth like this:
value="ognl:('components.tableRows.tableRow.' + ognl:columnName)"
-- 
View this message in context: 
http://www.nabble.com/dynamic-ognl-expr-tf2902234.html#a8108480
Sent from the Tapestry - User mailing list archive at Nabble.com.


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