You'll need to do this:
<bean:define id="cost"><<mytaglib:getvalue name="cost" /></bean:define>
<logic:empty name="cost">
FREE
</logic:empty>
<logic:notEmpty name="cost">
<bean:write name="cost"/>
</logic:notEmpty>
To test if a value is empty, you need to have something to test against.
Since your tag is just writing out the value, you need to capture that value
first, by defining a bean for it. Since the value of your output will never
be null, you cannot use <logic:present> to check it; you need to use
<logic:empty> instead.
--
Martin Cooper
> -----Original Message-----
> From: Tejas Bavishi [mailto:[EMAIL PROTECTED]]
> Sent: Friday, September 20, 2002 8:55 AM
> To: '[EMAIL PROTECTED]'
> Subject: Logic tag
>
>
> Hi,
>
> I have a question on using logic tags.
>
> In the following example, mytaglib is the tag library
> developed by me. I am
> printing the value returned by the following tag on the JSP page.
>
> <TD>
> <mytaglib:getvalue name="cost" />
> </TD>
>
>
> Now, I want to check that if the value returned by mytag is
> "", then I want
> to print FREE. I tried the following code.
>
> <logic:equal property="<mytaglib:getvalue name="cost" />" value="" >
> FREE
> </logic:equal>
>
>
> But the text FREE is printed regardless of the value returned
> by mytag.
> Obviously, I am doing something wrong or my approach is not correct.
> Can someone please guide me on this.
>
> Many Thanks,
> Tejas
>
>
>
>
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