package org.jtheque.utils.bean;

 import org.slf4j.LoggerFactory;

 import java.lang.reflect.Field;

 /*

  * This file is part of JTheque.

  *

  * JTheque 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.

  *

  * JTheque 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.

  *

  * You should have received a copy of the GNU General Public License

  * along with JTheque.  If not, see <http://www.gnu.org/licenses/>.

  */

 public final class BeanUtils {

     /**

      * Utility class, not instanciable.

      */

     private BeanUtils() {

         super();

     }

     /**

      * Create a quick memento using the specified fields.

      *

      * @param bean The bean to create the memento from.

      * @param fields The fields to use.

      *

      * @param <T> The type of data.

      *

      * @return A memento of the bean.

      */

     public static <T> T createQuickMemento(T bean, String... fields) {

         T instance = null;

         try {

             instance = (T) bean.getClass().newInstance();

             for (String field : fields) {

                 Object value = ReflectionUtils.getPropertyValue(bean, field);

                 ReflectionUtils.getSetterMethod(instance, field).invoke(instance, value);

             }

         } catch (Exception e) {

             LoggerFactory.getLogger(ReflectionUtils.class).error(e.getMessage(), e);

         }

         return instance;

     }

     /**

      * Restore the quick memento to the bean.

      *

      * @param bean The bean to restore.

      * @param memento The memento to restore.

      * @param fields The fields to use.

      */

     public static void restoreQuickMemento(Object bean, Object memento, String... fields) {

         try {

             for (String field : fields) {

                 Object value = ReflectionUtils.getPropertyValue(memento, field);

                 ReflectionUtils.getSetterMethod(bean, field).invoke(bean, value);

             }

         } catch (Exception e) {

             LoggerFactory.getLogger(ReflectionUtils.class).error(e.getMessage(), e);

         }

     }

     public static void set(Object bean, String field, Object value){

         try {

             Field f = bean.getClass().getDeclaredField(field);

             f.setAccessible(true);

             f.set(bean, value);

         } catch (NoSuchFieldException e) {

             LoggerFactory.getLogger(ReflectionUtils.class).error(e.getMessage(), e);

         } catch (IllegalAccessException e) {

             LoggerFactory.getLogger(ReflectionUtils.class).error(e.getMessage(), e);

         }

     }

     public static <T> T get(Object bean, String field) {

         try {

             Field f = bean.getClass().getDeclaredField(field);

             f.setAccessible(true);

             return (T) f.get(bean);

         } catch (NoSuchFieldException e) {

             LoggerFactory.getLogger(ReflectionUtils.class).error(e.getMessage(), e);

         } catch (IllegalAccessException e) {

             LoggerFactory.getLogger(ReflectionUtils.class).error(e.getMessage(), e);

         }

         return null;

     }

     public static <T> T getStatic(Class<?> aClass, String field) {

         try {

             Field f = aClass.getDeclaredField(field);

             f.setAccessible(true);

             return (T) f.get(null);

         } catch (NoSuchFieldException e) {

             LoggerFactory.getLogger(ReflectionUtils.class).error(e.getMessage(), e);

         } catch (IllegalAccessException e) {

             LoggerFactory.getLogger(ReflectionUtils.class).error(e.getMessage(), e);

         }

         return null;

     }

 }