Examples of java.text.StringCharacterIterator

java.text.StringCharacterIterator
StringCharacterIterator implements the CharacterIterater protocol for a String. The StringCharacterIterator class iterates over the entire String. @see CharacterIterator

  
    
  public static String escape(String aRegexFragment){
    final StringBuilder result = new StringBuilder();
    
    final StringCharacterIterator iterator = new StringCharacterIterator(aRegexFragment);
    char character =  iterator.current();
    while (character != CharacterIterator.DONE ){
      if (character == '.') {
        result.append("\\.");
      }
      else if (character == '\\') {
        result.append("\\\\");
      }
      else if (character == '?') {
        result.append("\\?");
      }
      else if (character == '*') {
        result.append("\\*");
      }
      else if (character == '+') {
        result.append("\\+");
      }
      else if (character == '&') {
        result.append("\\&");
      }
      else if (character == ':') {
        result.append("\\:");
      }
      else if (character == '{') {
        result.append("\\{");
      }
      else if (character == '}') {
        result.append("\\}");
      }
      else if (character == '[') {
        result.append("\\[");
      }
      else if (character == ']') {
        result.append("\\]");
      }
      else if (character == '(') {
        result.append("\\(");
      }
      else if (character == ')') {
        result.append("\\)");
      }
      else if (character == '^') {
        result.append("\\^");
      }
      else if (character == '$') {
        result.append("\\$");
      }
      else {
        result.append(character);
      }
      character = iterator.next();
    }
    return result.toString();
  }

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    public static boolean isFullyQualifiedClassname( String classname ) {
        if (classname == null) return false;
        String[] parts = classname.split("[\\.]");
        if (parts.length == 0) return false;
        for (String part : parts) {
            CharacterIterator iter = new StringCharacterIterator(part);
            // Check first character (there should at least be one character for each part) ...
            char c = iter.first();
            if (c == CharacterIterator.DONE) return false;
            if (!Character.isJavaIdentifierStart(c) && !Character.isIdentifierIgnorable(c)) return false;
            c = iter.next();
            // Check the remaining characters, if there are any ...
            while (c != CharacterIterator.DONE) {
                if (!Character.isJavaIdentifierPart(c) && !Character.isIdentifierIgnorable(c)) return false;
                c = iter.next();
            }
        }
        return true;
    }

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     * {@inheritDoc}
     */
    public String encode( String publicName ) {
        if (publicName == null) return null;
        StringBuilder sb = new StringBuilder();
        CharacterIterator iter = new StringCharacterIterator(publicName);
        for (char c = iter.first(); c != CharacterIterator.DONE; c = iter.next()) {
            char mapped = c;
            if (c == '*') {
                mapped = '\uF02A';
            } else if (c == '/') {
                mapped = '\uF02F';

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     * {@inheritDoc}
     */
    public String decode( String jcrNodeName ) {
        if (jcrNodeName == null) return null;
        StringBuilder sb = new StringBuilder();
        CharacterIterator iter = new StringCharacterIterator(jcrNodeName);
        for (char c = iter.first(); c != CharacterIterator.DONE; c = iter.next()) {
            char mapped = c;
            if (c == '\uF02A') {
                mapped = '*';
            } else if (c == '\uF02F') {
                mapped = '/';

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    public String encode( String text ) {
        if (text == null) return null;
        if (text.length() == 0) return text;
        final BitSet safeChars = isSlashEncoded() ? RFC2396_UNRESERVED_CHARACTERS : RFC2396_UNRESERVED_WITH_SLASH_CHARACTERS;
        final StringBuilder result = new StringBuilder();
        final CharacterIterator iter = new StringCharacterIterator(text);
        for (char c = iter.first(); c != CharacterIterator.DONE; c = iter.next()) {
            if (safeChars.get(c)) {
                // Safe character, so just pass through ...
                result.append(c);
            } else {
                // The character is not a safe character, and must be escaped ...

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     */
    public String decode( String encodedText ) {
        if (encodedText == null) return null;
        if (encodedText.length() == 0) return encodedText;
        final StringBuilder result = new StringBuilder();
        final CharacterIterator iter = new StringCharacterIterator(encodedText);
        for (char c = iter.first(); c != CharacterIterator.DONE; c = iter.next()) {
            if (c == ESCAPE_CHARACTER) {
                boolean foundEscapedCharacter = false;
                // Found the first character in a potential escape sequence, so grab the next two characters ...
                char hexChar1 = iter.next();
                char hexChar2 = hexChar1 != CharacterIterator.DONE ? iter.next() : CharacterIterator.DONE;
                if (hexChar2 != CharacterIterator.DONE) {
                    // We found two more characters, but ensure they form a valid hexadecimal number ...
                    int hexNum1 = Character.digit(hexChar1, 16);
                    int hexNum2 = Character.digit(hexChar2, 16);
                    if (hexNum1 > -1 && hexNum2 > -1) {

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  boolean changedString = false;
  int copyTo = 0;
  // it will always be less than the original
  char[] chars = new char[original.length()]; 
  StringCharacterIterator iter = new StringCharacterIterator(original);
  
  for(char c = iter.first(); c != CharacterIterator.DONE; 
      c = iter.next()) {


      if (c == '&') {
    changedString = true;
    copyTo = base64decode(chars, copyTo, iter);
      } else {

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    <P>Note that JSTL's {@code <c:out>} escapes <em>only the first 
    five</em> of the above characters.
   */
   public static String forHTML(String aText){
     final StringBuilder result = new StringBuilder();
     final StringCharacterIterator iterator = new StringCharacterIterator(aText);
     char character =  iterator.current();
     while (character != CharacterIterator.DONE ){
       if (character == '<') {
         result.append("&lt;");
       }
       else if (character == '>') {
         result.append("&gt;");
       }
       else if (character == '&') {
         result.append("&amp;");
      }
       else if (character == '\"') {
         result.append("&quot;");
       }
       else if (character == '\t') {
         addCharEntity(9, result);
       }
       else if (character == '!') {
         addCharEntity(33, result);
       }
       else if (character == '#') {
         addCharEntity(35, result);
       }
       else if (character == '$') {
         addCharEntity(36, result);
       }
       else if (character == '%') {
         addCharEntity(37, result);
       }
       else if (character == '\'') {
         addCharEntity(39, result);
       }
       else if (character == '(') {
         addCharEntity(40, result);
       }
       else if (character == ')') {
         addCharEntity(41, result);
       }
       else if (character == '*') {
         addCharEntity(42, result);
       }
       else if (character == '+') {
         addCharEntity(43, result);
       }
       else if (character == ',') {
         addCharEntity(44, result);
       }
       else if (character == '-') {
         addCharEntity(45, result);
       }
       else if (character == '.') {
         addCharEntity(46, result);
       }
       else if (character == '/') {
         addCharEntity(47, result);
       }
       else if (character == ':') {
         addCharEntity(58, result);
       }
       else if (character == ';') {
         addCharEntity(59, result);
       }
       else if (character == '=') {
         addCharEntity(61, result);
       }
       else if (character == '?') {
         addCharEntity(63, result);
       }
       else if (character == '@') {
         addCharEntity(64, result);
       }
       else if (character == '[') {
         addCharEntity(91, result);
       }
       else if (character == '\\') {
         addCharEntity(92, result);
       }
       else if (character == ']') {
         addCharEntity(93, result);
       }
       else if (character == '^') {
         addCharEntity(94, result);
       }
       else if (character == '_') {
         addCharEntity(95, result);
       }
       else if (character == '`') {
         addCharEntity(96, result);
       }
       else if (character == '{') {
         addCharEntity(123, result);
       }
       else if (character == '|') {
         addCharEntity(124, result);
       }
       else if (character == '}') {
         addCharEntity(125, result);
       }
       else if (character == '~') {
         addCharEntity(126, result);
       }
       else {
         //the char is not a special one
         //add it to the result as is
         result.append(character);
       }
       character = iterator.next();
     }
     return result.toString();
  }

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    is good for escaping to produce valid XML, but not for producing safe 
    HTML.</span>
  */
  public static String forXML(String aText){
    final StringBuilder result = new StringBuilder();
    final StringCharacterIterator iterator = new StringCharacterIterator(aText);
    char character =  iterator.current();
    while (character != CharacterIterator.DONE ){
      if (character == '<') {
        result.append("&lt;");
      }
      else if (character == '>') {
        result.append("&gt;");
      }
      else if (character == '\"') {
        result.append("&quot;");
      }
      else if (character == '\'') {
        result.append("&#039;");
      }
      else if (character == '&') {
         result.append("&amp;");
      }
      else {
        //the char is not a special one
        //add it to the result as is
        result.append(character);
      }
      character = iterator.next();
    }
    return result.toString();
  }

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   <P>See <a href='http://www.ietf.org/rfc/rfc4627.txt'>RFC 4627</a> for more information.
  */
  public static String forJSON(String aText){
    final StringBuilder result = new StringBuilder();
    StringCharacterIterator iterator = new StringCharacterIterator(aText);
    char character = iterator.current();
    while (character != StringCharacterIterator.DONE){
      if( character == '\"' ){
        result.append("\\\"");
      }
      else if(character == '\\'){
        result.append("\\\\");
      }
      else if(character == '/'){
        result.append("\\/");
      }
      else if(character == '\b'){
        result.append("\\b");
      }
      else if(character == '\f'){
        result.append("\\f");
      }
      else if(character == '\n'){
        result.append("\\n");
      }
      else if(character == '\r'){
        result.append("\\r");
      }
      else if(character == '\t'){
        result.append("\\t");
      }
      else {
        //the char is not a special one
        //add it to the result as is
        result.append(character);
      }
      character = iterator.next();
    }
    return result.toString();    
  }

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