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package javax.faces.view.facelets;
/**
* <p class="changed_added_2_0">There are concrete subclasses within the
* implementation that map concepts in the Facelet VDL page to JSF Java API
* calls the appropriate instances. For example, the
* “<code>validator</code>” attribute on an input component is
* specified to point to a <code>MethodExpression</code> that references a
* method that performs the validation. There is a concrete subclass of
* <code>Metadata</code> to perform this action when that attribute appears in a
* Facelet VDL page.</p>
*
* @since 2.0
*/
public abstract class Metadata {
/**
* <p class="changed_added_2_0">Take the action prescribed in the JSF
* specification for this particular VDL element attribute.</p>
*
* @param ctx The FaceletContext for this request.
* @param instance The instance from the JSF Java API on which the action
* should be taken. For example, an instance of {@link
* javax.faces.component.EditableValueHolder}.
*/
public abstract void applyMetadata(FaceletContext ctx, Object instance);
}