| /* |
| Copyright (c) 2001, 2002 Thai Open Source Software Center Ltd |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are |
| met: |
| |
| Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| |
| Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in |
| the documentation and/or other materials provided with the |
| distribution. |
| |
| Neither the name of the Thai Open Source Software Center Ltd nor |
| the names of its contributors may be used to endorse or promote |
| products derived from this software without specific prior written |
| permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR |
| CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| // @@3RD PARTY CODE@@ |
| |
| package com.sun.xml.internal.xsom.impl.util; |
| |
| import java.io.IOException; |
| import java.io.UnsupportedEncodingException; |
| import java.net.URL; |
| |
| 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 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) throws IOException { |
| if (isAbsolute(uriReference)) |
| return uriReference; |
| |
| if(baseUri==null) |
| throw new IOException("Unable to resolve relative URI "+uriReference+" without a base URI"); |
| |
| if(!isAbsolute(baseUri)) |
| throw new IOException("Unable to resolve relative URI "+uriReference+" because base URI is not absolute: "+baseUri); |
| |
| return new URL(new URL(baseUri), uriReference).toString(); |
| } |
| |
| 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; |
| } |
| } |