adding conditional component

[Beyonder Unknown <be...@yahoo.com>]

Hi all,

How do you guys implement a link that is conditional? Like for example the link only shows if a given data is provided. Adding the <a>-tag in the Markup will coz an error if the condition is not met, because AjaxLink is not added.


Thanks!
Wen Tong
 
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Re: adding conditional component

[Janos Cserep <cs...@metaprime.hu>]

>
> How do you guys implement a link that is conditional? Like for example the
> link only shows if a given data is provided. Adding the <a>-tag in the
> Markup will coz an error if the condition is not met, because AjaxLink is
> not added.
>
>
I usually handle such a situation by overriding the isVisible() method of
the component:

add(new Link("link") {

@Override
public boolean isVisible() {
    boolean externalCondition = ....;
    return super.isVisible() && externalCondition;
}

});