/* * Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package java.lang.reflect; import java.lang.annotation.Annotation; /** * Represents an annotated element of the program currently running in this * VM.  This interface allows annotations to be read reflectively.  All * annotations returned by methods in this interface are immutable and * serializable.  It is permissible for the caller to modify the * arrays returned by accessors for array-valued enum members; it will * have no affect on the arrays returned to other callers. * * <p>If an annotation returned by a method in this interface contains * (directly or indirectly) a {@link Class}-valued member referring to * a class that is not accessible in this VM, attempting to read the class * by calling the relevant Class-returning method on the returned annotation * will result in a {@link TypeNotPresentException}. * * <p>Similarly, attempting to read an enum-valued member will result in * a {@link EnumConstantNotPresentException} if the enum constant in the * annotation is no longer present in the enum type. * * <p>Finally, Attempting to read a member whose definition has evolved * incompatibly will result in a {@link * java.lang.annotation.AnnotationTypeMismatchException} or an * {@link java.lang.annotation.IncompleteAnnotationException}. * * @see java.lang.EnumConstantNotPresentException * @see java.lang.TypeNotPresentException * @see java.lang.annotation.AnnotationFormatError * @see java.lang.annotation.AnnotationTypeMismatchException * @see java.lang.annotation.IncompleteAnnotationException * @since 1.5 * @author Josh Bloch */public interface AnnotatedElement {    /**     * Returns true if an annotation for the specified type     * is present on this element, else false.  This method     * is designed primarily for convenient access to marker annotations.     *     * @param annotationClass the Class object corresponding to the     *        annotation type     * @return true if an annotation for the specified annotation     *     type is present on this element, else false     * @throws NullPointerException if the given annotation class is null     * @since 1.5     */     boolean isAnnotationPresent(Class<? extends Annotation> annotationClass);    /**     * Returns this element's annotation for the specified type if     * such an annotation is present, else null.     *     * @param annotationClass the Class object corresponding to the     *        annotation type     * @return this element's annotation for the specified annotation type if     *     present on this element, else null     * @throws NullPointerException if the given annotation class is null     * @since 1.5     */    <T extends Annotation> T getAnnotation(Class<T> annotationClass);     /**     * Returns all annotations present on this element.  (Returns an array     * of length zero if this element has no annotations.)  The caller of     * this method is free to modify the returned array; it will have no     * effect on the arrays returned to other callers.     *     * @return all annotations present on this element     * @since 1.5     */    Annotation[] getAnnotations();     /**     * Returns all annotations that are directly present on this     * element.  Unlike the other methods in this interface, this method     * ignores inherited annotations.  (Returns an array of length zero if     * no annotations are directly present on this element.)  The caller of     * this method is free to modify the returned array; it will have no     * effect on the arrays returned to other callers.     *     * @return All annotations directly present on this element     * @since 1.5     */    Annotation[] getDeclaredAnnotations();}