1 /*
   2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.xml.internal.bind.v2.model.annotation;
  27 
  28 import java.lang.annotation.Annotation;
  29 
  30 /**
  31  * Implemented by objects that can have annotations.
  32  *
  33  * @author Kohsuke Kawaguchi
  34  */
  35 public interface AnnotationSource {
  36     /**
  37      * Gets the value of the specified annotation from the given property.
  38      *
  39      * <p>
  40      * When this method is used for a property that consists of a getter and setter,
  41      * it returns the annotation on either of those methods. If both methods have
  42      * the same annotation, it is an error.
  43      *
  44      * @return
  45      *      null if the annotation is not present.
  46      */
  47     <A extends Annotation> A readAnnotation(Class<A> annotationType);
  48 
  49     /**
  50      * Returns true if the property has the specified annotation.
  51      * <p>
  52      * Short for <code>readAnnotation(annotationType)!=null</code>,
  53      * but this method is typically faster.
  54      */
  55     boolean hasAnnotation(Class<? extends Annotation> annotationType);
  56 }