    001    /* ===========================================================
    002     * JFreeChart : a free chart library for the Java(tm) platform
    003     * ===========================================================
    004     *
    005     * (C) Copyright 2000-2007, 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, 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    }