Menu
Maybe this is a dumb question, but I use
cc
to refer to the composite component, for instance cc.attrs.randomAttr but I have also seen the
component
implicit object and I have used it because I was told to but I don't really understand what it is for. Can anyone explain please?
419
cc refers to the top level composite component that is being processed at the time of evaluation.
component simply is the ui component being processed.
So when inside a composite component, cc refers to the 'parent' component, while component when used on an individual component refers to that particular instance. Or for simple cases:
cc == component.getCompositeComponentParent(component), with component being a component of which the composite component is build.
E.g. consider the following composite component:
<html
xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:cc="http://java.sun.com/jsf/composite"
>
<cc:interface/>
<cc:implementation>
<h:outputText value="Own ID: #{component.id}, parent composite ID: #{cc.id}" /> <br/>
<h:outputText value="Own ID: #{component.id}, parent composite ID: #{cc.id}" />
</cc:implementation>
</html>
Using this on a Facelet will print 2 different "own" IDs, namely the ones of the two outputText components, while the composite ID will be the same on both lines.
Note that things may become a little more complicated when multiple nestings of composite components are involved.
86
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
