ohair@286: /*
alanb@368:  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
ohair@286:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ohair@286:  *
ohair@286:  * This code is free software; you can redistribute it and/or modify it
ohair@286:  * under the terms of the GNU General Public License version 2 only, as
ohair@286:  * published by the Free Software Foundation.  Oracle designates this
ohair@286:  * particular file as subject to the "Classpath" exception as provided
ohair@286:  * by Oracle in the LICENSE file that accompanied this code.
ohair@286:  *
ohair@286:  * This code is distributed in the hope that it will be useful, but WITHOUT
ohair@286:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ohair@286:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ohair@286:  * version 2 for more details (a copy is included in the LICENSE file that
ohair@286:  * accompanied this code).
ohair@286:  *
ohair@286:  * You should have received a copy of the GNU General Public License version
ohair@286:  * 2 along with this work; if not, write to the Free Software Foundation,
ohair@286:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ohair@286:  *
ohair@286:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
ohair@286:  * or visit www.oracle.com if you need additional information or have any
ohair@286:  * questions.
ohair@286:  */
ohair@286: 
ohair@286: package com.sun.xml.internal.messaging.saaj.util;
ohair@286: 
ohair@286: 
ohair@286: // Cut&paste from sun.net.www.ParseUtil: decode, unescape
ohair@286: 
ohair@286: public class ParseUtil {
ohair@286:     /**
ohair@286:      * Un-escape and return the character at position i in string s.
ohair@286:      */
ohair@286:     private static char unescape(String s, int i) {
ohair@286:         return (char) Integer.parseInt(s.substring(i+1,i+3),16);
ohair@286:     }
ohair@286: 
ohair@286:     /**
ohair@286:      * Returns a new String constructed from the specified String by replacing
ohair@286:      * the URL escape sequences and UTF8 encoding with the characters they
ohair@286:      * represent.
ohair@286:      */
ohair@286:     public static String decode(String s) {
ohair@286:         StringBuffer sb = new StringBuffer();
ohair@286: 
ohair@286:         int i=0;
ohair@286:         while (i<s.length()) {
ohair@286:             char c = s.charAt(i);
ohair@286:             char c2, c3;
ohair@286: 
ohair@286:             if (c != '%') {
ohair@286:                 i++;
ohair@286:             } else {
ohair@286:                 try {
ohair@286:                     c = unescape(s, i);
ohair@286:                     i += 3;
ohair@286: 
ohair@286:                     if ((c & 0x80) != 0) {
ohair@286:                         switch (c >> 4) {
ohair@286:                             case 0xC: case 0xD:
ohair@286:                                 c2 = unescape(s, i);
ohair@286:                                 i += 3;
ohair@286:                                 c = (char)(((c & 0x1f) << 6) | (c2 & 0x3f));
ohair@286:                                 break;
ohair@286: 
ohair@286:                             case 0xE:
ohair@286:                                 c2 = unescape(s, i);
ohair@286:                                 i += 3;
ohair@286:                                 c3 = unescape(s, i);
ohair@286:                                 i += 3;
ohair@286:                                 c = (char)(((c & 0x0f) << 12) |
ohair@286:                                            ((c2 & 0x3f) << 6) |
ohair@286:                                             (c3 & 0x3f));
ohair@286:                                 break;
ohair@286: 
ohair@286:                             default:
ohair@286:                                 throw new IllegalArgumentException();
ohair@286:                         }
ohair@286:                     }
ohair@286:                 } catch (NumberFormatException e) {
ohair@286:                     throw new IllegalArgumentException();
ohair@286:                 }
ohair@286:             }
ohair@286: 
ohair@286:             sb.append(c);
ohair@286:         }
ohair@286: 
ohair@286:         return sb.toString();
ohair@286:     }
ohair@286: 
ohair@286: 
ohair@286: }