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From "Mike Kienenberger" <>
Subject Re: custom outputText
Date Wed, 29 Aug 2007 15:32:40 GMT
Yes, I think you're on the right track.  You don't need to create a
custom OutputText component; you just need to create a custom
OutputText renderer.

If you're using facelets, you can probably do this by using a generic
attribute, so you really only need to create a new renderer.

If you're using jsp, you'll have to subclass OutputText and the
OutputTextTag to store the matchingValue attribute on your component,
and in that case, you might as well use a concrete attribute.   You'll
also want to probably do a saveState/restoreState on that attribute as
well so it's preserved.   I don't remember if generic attributes get
saveState/restoreState, so you might even want to do this with

Once the component.getMatchingValue() method is available, then you
should simply be able to make use of it from your custom
OutputTextRenderer.     To install your renderer, I think you simply
need to register it in a faces-config.xml file with a matching

I'm not much help on the details as I haven't tried creating a custom
renderer recently.   I think it's all pretty straight-forward, though,
from what I remember.   You can always look at the MyFaces & Tomahawk
code as examples.

On 8/29/07, kewldude <> wrote:
> Okay, I have no experience whatsoever in creating a custom component, but I
> just finished reading this
> guide  on creating custom
> components.
> What I want to achieve is to customize the outputText component wherein any
> value of the outputText component will be compared to a string that is a
> value of a new attribute called matchString. Lets say the value in your
> outputText is "Mary had a little lamb." and the value of the matchString
> attribute is "lamb" (or it can be value binding also), what I would like to
> do is to change the color of the word "lamb" found in the "Mary had a little
> lamb" kinda value of the outputText (so when it is displayed the lamb word
> is hihglighted).
> My question is where do i place this code all together? I've read about
> having a Tag Class and a Component class and Im still trying to digest the
> idea. Where do you put the code(what method of the class) that takes care of
> outputting the value of outputText? My idea is to get the value of the value
> attribute then do some match and compare with the matchString vlaue, maybe
> via regex, then specifically write the html that will produce the different
> color for that match...I hope someone out there is generous enough to
> produce just a pseudocode that could guide me in creating this custom
> component...thanks...
> --
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