javax.faces.view.facelets

## Class Metadata

- java.lang.Object
- - javax.faces.view.facelets.Metadata

-     public abstract class Metadata
      extends Object

  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 “`validator`” attribute on an input component is specified to point to a `MethodExpression` that references a method that performs the validation. There is a concrete subclass of `Metadata` to perform this action when that attribute appears in a Facelet VDL page.

  Since:
    2.0

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `Metadata()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `abstract void` | `applyMetadata(FaceletContext ctx, Object instance)` Take the action prescribed in the JSF specification for this particular VDL element attribute.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### Metadata

          public Metadata()

  - ### Method Detail

    - #### applyMetadata

          public abstract void applyMetadata(FaceletContext ctx,
                           Object instance)

      Take the action prescribed in the JSF specification for this particular VDL element attribute.

      Parameters:
        `ctx` - The FaceletContext for this request.
        `instance` - The instance from the JSF Java API on which the action should be taken. For example, an instance of `EditableValueHolder`.

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