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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
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 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
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package com.sun.jersey.server.linking.impl;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Utility class for working with class fields
 * @author mh124079
 */
public class FieldDescriptor {

    protected Field field;

    FieldDescriptor(Field f) {
        this.field = f;
    }

    public Object getFieldValue(Object instance) {
        setAccessibleField(field);
        Object value = null;
        try {
            value = field.get(instance);
        } catch (IllegalArgumentException ex) {
            Logger.getLogger(FieldDescriptor.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            Logger.getLogger(FieldDescriptor.class.getName()).log(Level.SEVERE, null, ex);
        }
        return value;
    }

    public String getFieldName() {
        return field.getName();
    }

    protected static void setAccessibleField(final Field f) {
        if (Modifier.isPublic(f.getModifiers()))
            return;

        AccessController.doPrivileged(new PrivilegedAction