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ConstructorProperties.javaAPI DocJava SE 6 API1548Tue Jun 10 00:25:30 BST 2008java.beans

ConstructorProperties.java

/*
 * @(#)ConstructorProperties.java	1.1 06/02/27
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package java.beans;

import java.lang.annotation.*;
import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;

/**
   <p>An annotation on a constructor that shows how the parameters of
   that constructor correspond to the constructed object's getter
   methods.  For example:

   <blockquote>
<pre>
   public class Point {
       @ConstructorProperties({"x", "y"})
       public Point(int x, int y) {
       	   this.x = x;
           this.y = y;
       }

       public int getX() {
       	   return x;
       }

       public int getY() {
       	   return y;
       }

       private final int x, y;
   }
</pre>
</blockquote>

   The annotation shows that the first parameter of the constructor
   can be retrieved with the {@code getX()} method and the second with
   the {@code getY()} method.  Since parameter names are not in
   general available at runtime, without the annotation there would be
   no way to know whether the parameters correspond to {@code getX()}
   and {@code getY()} or the other way around.</p>

   @since 1.6
*/
@Documented @Target(CONSTRUCTOR) @Retention(RUNTIME)
public @interface ConstructorProperties {
    /**
       <p>The getter names.</p>
       @return the getter names corresponding to the parameters in the
       annotated constructor.
    */
    String[] value();
}