001 /* 002 * Copyright (C) 2008-2010 by Holger Arndt 003 * 004 * This file is part of the Universal Java Matrix Package (UJMP). 005 * See the NOTICE file distributed with this work for additional 006 * information regarding copyright ownership and licensing. 007 * 008 * UJMP is free software; you can redistribute it and/or modify 009 * it under the terms of the GNU Lesser General Public License as 010 * published by the Free Software Foundation; either version 2 011 * of the License, or (at your option) any later version. 012 * 013 * UJMP is distributed in the hope that it will be useful, 014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 016 * GNU Lesser General Public License for more details. 017 * 018 * You should have received a copy of the GNU Lesser General Public 019 * License along with UJMP; if not, write to the 020 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 021 * Boston, MA 02110-1301 USA 022 */ 023 024 package org.ujmp.core.util; 025 026 import java.lang.reflect.Field; 027 028 public class ReflectionUtil { 029 030 public static Object extractPrivateField(Object o, String fieldName) { 031 return extractPrivateField(o.getClass(), o, fieldName); 032 } 033 034 public static Object extractPrivateField(Class<?> c, Object o, String fieldName) { 035 Field[] fields = c.getDeclaredFields(); 036 if (fields != null) { 037 for (Field f : fields) { 038 try { 039 if (fieldName.equals(f.getName())) { 040 boolean isAccessible = f.isAccessible(); 041 f.setAccessible(true); 042 Object value = f.get(o); 043 f.setAccessible(isAccessible); 044 return value; 045 } 046 } catch (Exception e) { 047 e.printStackTrace(); 048 } 049 } 050 } 051 return null; 052 } 053 054 }