001 /* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
006 *
007 * Project Info: http://www.jfree.org/jfreechart/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
022 * USA.
023 *
024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025 * in the United States and other countries.]
026 *
027 * -----------------
028 * URLUtilities.java
029 * -----------------
030 * (C) Copyright 2007, 2008, by Object Refinery Limited.
031 *
032 * Original Author: David Gilbert (for Object Refinery Limited);
033 * Contributors: -;
034 *
035 * Changes:
036 * --------
037 * 17-Apr-2007 : Version 1 (DG);
038 *
039 */
040
041 package org.jfree.chart.urls;
042
043 import java.lang.reflect.InvocationTargetException;
044 import java.lang.reflect.Method;
045 import java.net.URLEncoder;
046
047 /**
048 * General utility methods for URLs.
049 *
050 * @since 1.0.6
051 */
052 public class URLUtilities {
053
054 /** Constant used by {@link #encode(String, String)}. */
055 private static final Class[] STRING_ARGS_2 = new Class[] {String.class,
056 String.class};
057
058 /**
059 * Calls <code>java.net.URLEncoder.encode(String, String)</code> via
060 * reflection, if we are running on JRE 1.4 or later, otherwise reverts to
061 * the deprecated <code>URLEncoder.encode(String)</code> method.
062 *
063 * @param s the string to encode.
064 * @param encoding the encoding.
065 *
066 * @return The encoded string.
067 *
068 * @since 1.0.6
069 */
070 public static String encode(String s, String encoding) {
071 Class c = URLEncoder.class;
072 String result = null;
073 try {
074 Method m = c.getDeclaredMethod("encode", STRING_ARGS_2);
075 try {
076 result = (String) m.invoke(null, new Object[] {s, encoding});
077 }
078 catch (InvocationTargetException e) {
079 e.printStackTrace();
080 }
081 catch (IllegalAccessException e) {
082 e.printStackTrace();
083 }
084 }
085 catch (NoSuchMethodException e) {
086 // we're running on JRE 1.3.1 so this is the best we have...
087 result = URLEncoder.encode(s);
088 }
089 return result;
090 }
091
092 }