content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE 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 for more details.
   *
   *  You should have received a copy of the GNU General Public License
   *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 2001-2005 The Apache Software Foundation.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package jaxp.sun.org.apache.xerces.internal.impl.dv.xs;
  
  import jaxp.sun.org.apache.xerces.internal.impl.dv.InvalidDatatypeValueException;
  import jaxp.sun.org.apache.xerces.internal.util.URI;
  import jaxp.sun.org.apache.xerces.internal.impl.dv.ValidationContext;
  
  /**
   * Represent the schema type "anyURI"
   *
   * @xerces.internal
   *
   * @author Neeraj Bajaj, Sun Microsystems, inc.
   * @author Sandy Gao, IBM
   *
   */
  public class AnyURIDV extends TypeValidator {
  
      private static final URI BASE_URI;
      static {
          URI uri = null;
          try {
              uri = new URI("abc://def.ghi.jkl");
          } catch (URI.MalformedURIException ex) {
          }
          BASE_URI = uri;
      }
  
      public short getAllowedFacets(){
          return (XSSimpleTypeDecl.FACET_LENGTH | XSSimpleTypeDecl.FACET_MINLENGTH | XSSimpleTypeDecl.FACET_MAXLENGTH | XSSimpleTypeDecl.FACET_PATTERN | XSSimpleTypeDecl.FACET_ENUMERATION | XSSimpleTypeDecl.FACET_WHITESPACE );
      }
  
      // before we return string we have to make sure it is correct URI as per spec.
      // for some types (string and derived), they just return the string itself
      public Object getActualValue(String content, ValidationContext context) throws InvalidDatatypeValueException {
          // check 3.2.17.c0 must: URI (rfc 2396/2723)
          try {
              if( content.length() != 0 ) {
                  // encode special characters using XLink 5.4 algorithm
                  final String encoded = encode(content);
                  // Support for relative URLs
                  // According to Java 1.1: URLs may also be specified with a
                  // String and the URL object that it is related to.
                  new URI(BASE_URI, encoded );
              }
          } catch (URI.MalformedURIException ex) {
              throw new InvalidDatatypeValueException("cvc-datatype-valid.1.2.1", new Object[]{content, "anyURI"});
          }
  
          // REVISIT: do we need to return the new URI object?
          return content;
      }
  
      // which ASCII characters need to be escaped
      private static boolean gNeedEscaping[] = new boolean[128];
      // the first hex character if a character needs to be escaped
      private static char gAfterEscaping1[] = new char[128];
      // the second hex character if a character needs to be escaped
      private static char gAfterEscaping2[] = new char[128];
      private static char[] gHexChs = {'0', '1', '2', '3', '4', '5', '6', '7',
                                       '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
      // initialize the above 3 arrays
      static {
          for (int i = 0; i <= 0x1f; i++) {
              gNeedEscaping[i] = true;
              gAfterEscaping1[i] = gHexChs[i >> 4];
              gAfterEscaping2[i] = gHexChs[i & 0xf];
          }
          gNeedEscaping[0x7f] = true;
          gAfterEscaping1[0x7f] = '7';
          gAfterEscaping2[0x7f] = 'F';
          char[] escChs = {' ', '<', '>', '"', '{', '}',
                           '|', '\\', '^', '~', '`'};
          int len = escChs.length;
          char ch;
          for (int i = 0; i < len; i++) {
              ch = escChs[i];
              gNeedEscaping[ch] = true;
              gAfterEscaping1[ch] = gHexChs[ch >> 4];
              gAfterEscaping2[ch] = gHexChs[ch & 0xf];
          }
      }
  
      // To encode special characters in anyURI, by using %HH to represent
      // special ASCII characters: 0x00~0x1F, 0x7F, ' ', '<', '>', etc.
      // and non-ASCII characters (whose value >= 128).
      private static String encode(String anyURI){
          int len = anyURI.length(), ch;
          StringBuffer buffer = new StringBuffer(len*3);
  
          // for each character in the anyURI
          int i = 0;
          for (; i < len; i++) {
              ch = anyURI.charAt(i);
              // if it's not an ASCII character, break here, and use UTF-8 encoding
              if (ch >= 128)
                  break;
              if (gNeedEscaping[ch]) {
                  buffer.append('%');
                  buffer.append(gAfterEscaping1[ch]);
                  buffer.append(gAfterEscaping2[ch]);
              }
              else {
                  buffer.append((char)ch);
              }
          }
  
          // we saw some non-ascii character
          if (i < len) {
              // get UTF-8 bytes for the remaining sub-string
              byte[] bytes = null;
              byte b;
              try {
                  bytes = anyURI.substring(i).getBytes("UTF-8");
              } catch (java.io.UnsupportedEncodingException e) {
                  // should never happen
                  return anyURI;
              }
              len = bytes.length;
  
              // for each byte
              for (i = 0; i < len; i++) {
                  b = bytes[i];
                  // for non-ascii character: make it positive, then escape
                  if (b < 0) {
                      ch = b + 256;
                      buffer.append('%');
                      buffer.append(gHexChs[ch >> 4]);
                      buffer.append(gHexChs[ch & 0xf]);
                  }
                  else if (gNeedEscaping[b]) {
                      buffer.append('%');
                      buffer.append(gAfterEscaping1[b]);
                      buffer.append(gAfterEscaping2[b]);
                  }
                  else {
                      buffer.append((char)b);
                  }
              }
          }
  
          // If encoding happened, create a new string;
          // otherwise, return the orginal one.
          if (buffer.length() != len) {
              return buffer.toString();
          }
          else {
              return anyURI;
          }
      }
  
  } // class AnyURIDV
  