    001/* ===========================================================
    002 * JFreeChart : a free chart library for the Java(tm) platform
    003 * ===========================================================
    004 *
    005 * (C) Copyright 2000-2011, 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}