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Qualifier
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javax.inject</FONT>
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Annotation Type Qualifier</H2>
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<DT><PRE><FONT SIZE="-1">@Target(value=ANNOTATION_TYPE)
@Retention(value=RUNTIME)
@Documented
</FONT>public @interface <B>Qualifier</B></DL>
</PRE>

<P>
Identifies qualifier annotations. Anyone can define a new qualifier. A
 qualifier annotation:

 <ul>
   <li>is annotated with <code>@Qualifier</code>, <code>@Retention(RUNTIME)</code>,
      and typically <code>@Documented</code>.</li>
   <li>can have attributes.</li>
   <li>may be part of the public API, much like the dependency type, but
      unlike implementation types which needn't be part of the public
      API.</li>
   <li>may have restricted usage if annotated with <code>@Target</code>. While
      this specification covers applying qualifiers to fields and
      parameters only, some injector configurations might use qualifier
      annotations in other places (on methods or classes for example).</li>
 </ul>

 <p>For example:

 <pre>
   &#064;java.lang.annotation.Documented
   &#064;java.lang.annotation.Retention(RUNTIME)
   &#064;javax.inject.Qualifier
   public @interface Leather {
     Color color() default Color.TAN;
     public enum Color { RED, BLACK, TAN }
   }</pre>
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<DT><B>See Also:</B><DD><A HREF="../../javax/inject/Named.html" title="annotation in javax.inject"><CODE>@Named</CODE></A></DL>

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