001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2009 SonarSource SA
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * Sonar is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    package org.sonar.api.utils;
021    
022    import java.lang.annotation.Annotation;
023    
024    /**
025     * @since 1.11
026     */
027    public final class AnnotationUtils {
028    
029      private AnnotationUtils() {
030      }
031    
032      /**
033       * Search for a class annotation. All inheritance tree is analysed.
034       */
035      public static <A> A getClassAnnotation(final Object object, final Class<A> annotationClass) {
036        Class aClass = object.getClass();
037        while (aClass != null) {
038          Annotation annotation = aClass.getAnnotation(annotationClass);
039          if (annotation != null) {
040            return (A) annotation;
041          }
042          aClass = aClass.getSuperclass();
043        }
044        return null;
045      }
046    }