Java Reflection Annotation getAnnotation(Class clazz, Class annotation)

Description

get Annotation

License

Open Source License

Declaration

public static <T extends Annotation> T getAnnotation(Class<?> clazz,
            Class<T> annotation) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * QMetry Automation Framework provides a powerful and versatile platform to
 * author//  www.j a v a  2  s .  c om
 * Automated Test Cases in Behavior Driven, Keyword Driven or Code Driven
 * approach
 * Copyright 2016 Infostretch Corporation
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or any later version.
 * This program 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 for more
 * details.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT
 * OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE
 * You should have received a copy of the GNU General Public License along with
 * this program in the name of LICENSE.txt in the root folder of the
 * distribution. If not, see https://opensource.org/licenses/gpl-3.0.html
 * See the NOTICE.TXT file in root folder of this source files distribution
 * for additional information regarding copyright ownership and licenses
 * of other open source software / files used by QMetry Automation Framework.
 * For any inquiry or need additional information, please contact
 * support-qaf@infostretch.com
 *******************************************************************************/

import java.lang.annotation.Annotation;

import java.lang.reflect.Method;

public class Main {
    public static <T extends Annotation> T getAnnotation(Method method,
            Class<T> annotation) {
        if (method.isAnnotationPresent(annotation))
            return method.getAnnotation(annotation);
        Class<?>[] intfaces = method.getDeclaringClass().getInterfaces();
        for (Class<?> intface : intfaces) {
            try {
                Method iMethod = intface.getMethod(method.getName(),
                        method.getParameterTypes());
                if (iMethod.isAnnotationPresent(annotation))
                    return iMethod.getAnnotation(annotation);
            } catch (NoSuchMethodException e) {
                // Ignore!...
            } catch (SecurityException e) {
                // Ignore!...
            }

        }
        return null;
    }

    public static <T extends Annotation> T getAnnotation(Class<?> clazz,
            Class<T> annotation) {
        if (clazz.isAnnotationPresent(annotation))
            return clazz.getAnnotation(annotation);
        Class<?>[] intfaces = clazz.getInterfaces();
        for (Class<?> intface : intfaces) {
            try {

                if (intface.isAnnotationPresent(annotation))
                    return intface.getAnnotation(annotation);
            } catch (SecurityException e) {
                // Ignore!...
            }

        }
        return null;
    }

    /**
     * Get all methods of the class including parent.
     * 
     * @param clazz
     * @param name
     *            case-insensitive method name to get
     * @return
     * @throws NoSuchMethodException
     */
    public static Method getMethod(Class<?> clazz, String name)
            throws NoSuchMethodException {
        Method[] methods = clazz.getMethods();
        for (Method m : methods) {
            if (m.getName().equalsIgnoreCase(name)) {
                return m;
            }
        }
        if (null != clazz.getSuperclass()) {
            getMethod(clazz.getSuperclass(), name);
        }
        throw new NoSuchMethodException();
    }
}

Related

1. getAnnotation(Class clazz, Class annotationClass)
2. getAnnotation(Class clazz, Class annotClass, boolean forceInherit)
3. getAnnotation(Class clazz, Class annotationClass)
4. getAnnotation(Class clazz, Class ann)
5. getAnnotation(Class clazz, Class annClazz)
6. getAnnotation(Class clazz, Class annotation)
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