001 /* 002 * Sonar, open source software quality management tool. 003 * Copyright (C) 2008-2012 SonarSource 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 org.apache.commons.lang.ClassUtils; 023 024 import java.util.List; 025 026 /** 027 * A utility class for annotations 028 * 029 * @since 1.11 030 */ 031 public final class AnnotationUtils { 032 033 private AnnotationUtils() { 034 } 035 036 /** 037 * Searches for a class annotation. All inheritance tree is analysed. 038 */ 039 public static <A> A getClassAnnotation(final Object object, final Class<A> annotationClass) { 040 Class initialClass = (object instanceof Class ? (Class) object : object.getClass()); 041 A result = null; 042 Class aClass=initialClass; 043 while (aClass != null && result == null) { 044 result = (A)aClass.getAnnotation(annotationClass); 045 aClass = aClass.getSuperclass(); 046 } 047 048 if (result==null) { 049 List<Class> interfaces = ClassUtils.getAllInterfaces(initialClass); 050 for (Class anInterface : interfaces) { 051 result = (A)anInterface.getAnnotation(annotationClass); 052 if (result!=null) { 053 break; 054 } 055 } 056 } 057 return result; 058 } 059 }