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Passing attributes to custom component

Robe Eleckers
Greenhorn

Joined: Jul 08, 2009
Posts: 9
Hello,

I'm building a custom component by extending the UIComponentBase class and overriding the encodeAll method to generate html output. This component is added to my custom taglib so now I can call the component in my facelet with:

I would like to pass some attributes to this component, like this:

When I do this I get the error message 'The attribute root is not defined in the component's interface'. I know where to define these attributes when creating a composite custom component (<composite:interface>), but where can I define these attributes in my case? Unfortunately my google search did not help me since most custom component tutorials are about composite components.
Tim Holloway
Saloon Keeper

Joined: Jun 25, 2001
Posts: 16020
    
  20

Is this a fatal message, or just a complaint in the log?

In basic JSP tags, you had to define the attributes in a TLD file. In basic JSF - well, I forget, but I think it was slightly different. When using Facelets, the rules changed again, but the error message became only a message instead of a full-blown error.


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Robe Eleckers
Greenhorn

Joined: Jul 08, 2009
Posts: 9
Hi, it was a fatal message. Also generated a stacktrace when running the project. I fixed it now by implementing my own UIComponentELTag, to this implementation I added a property which is now set. My taglib had to be changed for this, now it looks like:

So the good thing is it works, however I feel it's more work now than really necessary. Are there perhaps any annotations which can help with this configuration?
 
It is sorta covered in the JavaRanch Style Guide.
 
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