001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2013, 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 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
025 * Other names may be trademarks of their respective owners.]
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
041package org.jfree.chart.urls;
042
043import java.lang.reflect.InvocationTargetException;
044import java.lang.reflect.Method;
045import java.net.URLEncoder;
046
047/**
048 * General utility methods for URLs.
049 *
050 * @since 1.0.6
051 */
052public 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}