| /* |
| * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| /* |
| * Copyright (C) 2004-2011 |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| package com.sun.xml.internal.rngom.util; |
| |
| import java.net.URL; |
| import java.net.MalformedURLException; |
| import java.io.UnsupportedEncodingException; |
| |
| public class Uri { |
| private static String utf8 = "UTF-8"; |
| |
| public static boolean isValid(String s) { |
| return isValidPercent(s) && isValidFragment(s) && isValidScheme(s); |
| } |
| |
| private static final String HEX_DIGITS = "0123456789abcdef"; |
| |
| public static String escapeDisallowedChars(String s) { |
| StringBuffer buf = null; |
| int len = s.length(); |
| int done = 0; |
| for (;;) { |
| int i = done; |
| for (;;) { |
| if (i == len) { |
| if (done == 0) |
| return s; |
| break; |
| } |
| if (isExcluded(s.charAt(i))) |
| break; |
| i++; |
| } |
| if (buf == null) |
| buf = new StringBuffer(); |
| if (i > done) { |
| buf.append(s.substring(done, i)); |
| done = i; |
| } |
| if (i == len) |
| break; |
| for (i++; i < len && isExcluded(s.charAt(i)); i++) |
| ; |
| String tem = s.substring(done, i); |
| byte[] bytes; |
| try { |
| bytes = tem.getBytes(utf8); |
| } |
| catch (UnsupportedEncodingException e) { |
| utf8 = "UTF8"; |
| try { |
| bytes = tem.getBytes(utf8); |
| } |
| catch (UnsupportedEncodingException e2) { |
| // Give up |
| return s; |
| } |
| } |
| for (int j = 0; j < bytes.length; j++) { |
| buf.append('%'); |
| buf.append(HEX_DIGITS.charAt((bytes[j] & 0xFF) >> 4)); |
| buf.append(HEX_DIGITS.charAt(bytes[j] & 0xF)); |
| } |
| done = i; |
| } |
| return buf.toString(); |
| } |
| |
| private static final String excluded = "<>\"{}|\\^`"; |
| |
| private static boolean isExcluded(char c) { |
| return c <= 0x20 || c >= 0x7F || excluded.indexOf(c) >= 0; |
| } |
| |
| private static boolean isAlpha(char c) { |
| return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'); |
| } |
| |
| private static boolean isHexDigit(char c) { |
| return ('a' <= c && c <= 'f') || ('A' <= c && c <= 'F') || isDigit(c); |
| } |
| |
| private static boolean isDigit(char c) { |
| return '0' <= c && c <= '9'; |
| } |
| |
| private static boolean isSchemeChar(char c) { |
| return isAlpha(c) || isDigit(c) || c == '+' || c == '-' || c =='.'; |
| } |
| |
| private static boolean isValidPercent(String s) { |
| int len = s.length(); |
| for (int i = 0; i < len; i++) |
| if (s.charAt(i) == '%') { |
| if (i + 2 >= len) |
| return false; |
| else if (!isHexDigit(s.charAt(i + 1)) |
| || !isHexDigit(s.charAt(i + 2))) |
| return false; |
| } |
| return true; |
| } |
| |
| private static boolean isValidFragment(String s) { |
| int i = s.indexOf('#'); |
| return i < 0 || s.indexOf('#', i + 1) < 0; |
| } |
| |
| private static boolean isValidScheme(String s) { |
| if (!isAbsolute(s)) |
| return true; |
| int i = s.indexOf(':'); |
| if (i == 0 |
| || i + 1 == s.length() |
| || !isAlpha(s.charAt(0))) |
| return false; |
| while (--i > 0) |
| if (!isSchemeChar(s.charAt(i))) |
| return false; |
| return true; |
| } |
| |
| public static String resolve(String baseUri, String uriReference) { |
| if (!isAbsolute(uriReference) && baseUri != null && isAbsolute(baseUri)) { |
| try { |
| return new URL(new URL(baseUri), uriReference).toString(); |
| } |
| catch (MalformedURLException e) { } |
| } |
| return uriReference; |
| } |
| |
| public static boolean hasFragmentId(String uri) { |
| return uri.indexOf('#') >= 0; |
| } |
| |
| public static boolean isAbsolute(String uri) { |
| int i = uri.indexOf(':'); |
| if (i < 0) |
| return false; |
| while (--i >= 0) { |
| switch (uri.charAt(i)) { |
| case '#': |
| case '/': |
| case '?': |
| return false; |
| } |
| } |
| return true; |
| } |
| } |