is Object Annotated With - Java java.lang.annotation

Java examples for java.lang.annotation:Annotation Attribute

  1. HOME
  2. Java
  3. java.lang.annotation
  4. Annotation Attribute

Description

is Object Annotated With

Demo Code

/**/*from   w  w w  .j  a  v  a 2 s  . com*/
 *   GRANITE DATA SERVICES
 *   Copyright (C) 2006-2015 GRANITE DATA SERVICES S.A.S.
 *
 *   This file is part of the Granite Data Services Platform.
 *
 *   Granite Data Services is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU Lesser General Public
 *   License as published by the Free Software Foundation; either
 *   version 2.1 of the License, or (at your option) any later version.
 *
 *   Granite Data Services 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 Lesser
 *   General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 *   USA, or see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.Method;

public class Main {


    public static boolean isAnnotatedWith(Object entity,
            String propertyName, Class<? extends Annotation> annotationClass) {
        Field field = null;
        Class<?> c = entity.getClass();
        while (c != null && !c.equals(Object.class)) {
            for (Field f : c.getDeclaredFields()) {
                if (f.getName().equals(propertyName)) {
                    field = f;
                    break;
                }
            }
            if (field != null)
                break;
            c = c.getSuperclass();
        }
        if (field.isAnnotationPresent(annotationClass))
            return true;

        String getterName = "get"
                + propertyName.substring(0, 1).toUpperCase()
                + propertyName.substring(1);
        try {
            Method getter = entity.getClass().getMethod(getterName);
            return getter.isAnnotationPresent(annotationClass);
        } catch (NoSuchMethodException e) {
            return false;
        }
    }
}

Related Tutorials