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## com.opensymphony.xwork2.util
Annotation Type Key

    @Retention(value=RUNTIME)
    @Target(value={FIELD,METHOD})
    public @interface Key

Sets the Key for type conversion.

Annotation usage:

The Key annotation must be applied at field or method level.

Annotation parameters:

Parameter | Required | Default | Description
--- | --- | --- | ---
value | no | java.lang.Object.class | The key property value.

Example code:

     // The key property for User objects within the users collection is the userName attribute.
     @Key( value = java.lang.Long.class )
     private Map userMap;

Version:
  $Id$
Author:
  Rainer Hermanns

Optional Element Summary
`Class` | `value` The Key value.

### value

    public abstract Class value

  The Key value. Defaults to `java.lang.Object.class`.

  Default:
    java.lang.Object.class

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