You are right with that Richard, if is better to do .toString() than
the cast to String. Can you submit a patch or tell me Class/line so I
can fix this?
Regards,
Bruno
2005/7/26, Richard Wallace <[EMAIL PROTECTED]>:
> Here's a related question. The line that is causing me my problems is:
>
> return vb != null ? (String)vb.getValue(getFacesContext()) : null;
>
> Isn't it better to do vb.getValue(getFacesContext()).toString() for
> performance reasons anyways? I mean, if it is a String object it will
> just do a "return this;" which should be cheaper than a cast from an
> Object to a String. It also causes the value to be coerced into a
> String. Unless this is strictly forbidden by the standard, it can't see
> a reason not to implement it this way.
>
> Thanks,
> Rich
>
> Richard Wallace wrote:
>
> > Klug, Boris wrote:
> >
> >> Hi!
> >>
> >> the problem may be that a your calculation returns an int but the el
> >> statement
> >> has to return an String. So do the calculation in your managed bean
> >> and return
> >> the result as a String.
> >>
> >>
> >>
> > Thanks for the reply. I had expected that the value would be coerced
> > into the proper type tho, as in other EL statements. Is this a bug or
> > the right thing? If this implementation is correct, is there anyway
> > to convert the calculation to a string? I really don't like the idea
> > of having to do the calculation in the backing bean cause then my page
> > designers can't easily vary the size of the image. I could put it in
> > the faces-config.xml, but that would still require them to restart
> > their tomcat instance just to make a change to the page layout/display.
> >
> > Right now I've got a workaround. It's rather messy but it works. I
> > basically use the plain old <img> tag and do a couple of
> > <h:outputText> in the attributes to make sure the image path contains
> > the contextPath and then one to perform and output the calculation in
> > the height attribute. Like I said, it's rather messy, but it works
> > and allows the page designers to make better control over the page
> > layout and display.
> >
> > Rich
> >
> >> --
> >> Boris Klug
> >>
> >>
> >> Zitat von Richard Wallace <[EMAIL PROTECTED]>:
> >>
> >>
> >>
> >>> Hello everyone,
> >>>
> >>> I'm working on a report that has a bar chart. I thought the easiest
> >>> way
> >>> to display it would be to use something like:
> >>>
> >>> <h:graphicImage url="/images/visual_bar_1.gif" width="46"
> >>> height="#{reportHandler.score * 18}" border="0" />
> >>>
> >>> But that horks with:
> >>>
> >>> java.lang.ClassCastException
> >>> at
> >>>
> >>>
> >>
> >> javax.faces.component.html.HtmlGraphicImage.getHeight(HtmlGraphicImage.java:95)
> >>
> >>
> >>
> >>> at sun.reflect.GeneratedMethodAccessor110.invoke(Unknown Source)
> >>> at
> >>>
> >>>
> >>
> >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> >>
> >>
> >>
> >>> at java.lang.reflect.Method.invoke(Method.java:324)
> >>> at
> >>> javax.faces.component._ComponentAttributesMap.getComponentProperty(_C
> >>>
> >>> Can I not set the height to some calculated value?
> >>>
> >>> Thanks,
> >>> Rich
> >>>
> >>>
> >>
> >>
> >>
> >>
> >
>
>
