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/**
 * Copyright (c) 2011-2012 INRIA.
 * 
 * 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
 * (at your option) 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.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see 
 **/
package fr.inria.eventcloud.utils;

import java.lang.reflect.Field;

/**
 * A utility class for reflectively finding fields using reflection.
 * 
 * @author bsauvan
 */
public class ReflectionUtils {

    /**
     * Returns the value of a private/protected/public field.
     * 
     * @param instance
     *            the object instance.
     * @param fieldName
     *            the name of the field.
     * 
     * @return the value of the field or null if not found or an error is
     *         encountered.
     */
    public static Object getFieldValue(Object instance, String fieldName) {
        try {
            Field field = instance.getClass().getDeclaredField(fieldName);
            field.setAccessible(true);
            return field.get(instance);
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }

        return null;
    }

}