Examples of java.text.CharacterIterator

java.text.CharacterIterator
This interface defines a protocol for bidirectional iteration over text. The iterator iterates over a bounded sequence of characters. Characters are indexed with values beginning with the value returned by getBeginIndex() and continuing through the value returned by getEndIndex()-1.
Iterators maintain a current character index, whose valid range is from getBeginIndex() to getEndIndex(); the value getEndIndex() is included to allow handling of zero-length text ranges and for historical reasons. The current index can be retrieved by calling getIndex() and set directly by calling setIndex(), first(), and last().
The methods previous() and next() are used for iteration. They return DONE if they would move outside the range from getBeginIndex() to getEndIndex() -1, signaling that the iterator has reached the end of the sequence. DONE is also returned by other methods to indicate that the current index is outside this range.
Examples:
Traverse the text from start to finish
```
 public void traverseForward(CharacterIterator iter) { for(char c = iter.first(); c != CharacterIterator.DONE; c = iter.next()) { processChar(c); } } 
```
Traverse the text backwards, from end to start
```
 public void traverseBackward(CharacterIterator iter) { for(char c = iter.last(); c != CharacterIterator.DONE; c = iter.previous()) { processChar(c); } } 
```
Traverse both forward and backward from a given position in the text. Calls to notBoundary() in this example represents some additional stopping criteria.
```
 public void traverseOut(CharacterIterator iter, int pos) { for (char c = iter.setIndex(pos); c != CharacterIterator.DONE && notBoundary(c); c = iter.next()) { } int end = iter.getIndex(); for (char c = iter.setIndex(pos); c != CharacterIterator.DONE && notBoundary(c); c = iter.previous()) { } int start = iter.getIndex(); processSection(start, end); } 
```
@see StringCharacterIterator @see AttributedCharacterIterator

     * @return -1 when not match; offset of the end of matched string when match.
     */
    private int matchCharacterIterator (Context con, Op op, int offset, int dx, int opts) {




        CharacterIterator target = con.ciTarget;












        while (true) {
            if (op == null)
                return offset;
            if (offset > con.limit || offset < con.start)
                return -1;
            switch (op.type) {
            case Op.CHAR:
                if (isSet(opts, IGNORE_CASE)) {
                    int ch = op.getData();
                    if (dx > 0) {
                        if (offset >= con.limit || !matchIgnoreCase(ch,  target .setIndex(  offset ) ))
                            return -1;
                        offset ++;
                    } else {
                        int o1 = offset-1;
                        if (o1 >= con.limit || o1 < 0 || !matchIgnoreCase(ch,  target .setIndex(  o1 ) ))
                            return -1;
                        offset = o1;
                    }
                } else {
                    int ch = op.getData();
                    if (dx > 0) {
                        if (offset >= con.limit || ch !=  target .setIndex(  offset ) )
                            return -1;
                        offset ++;
                    } else {
                        int o1 = offset-1;
                        if (o1 >= con.limit || o1 < 0 || ch !=  target .setIndex(  o1 ) )
                            return -1;
                        offset = o1;
                    }
                }
                op = op.next;
                break;


            case Op.DOT:
                if (dx > 0) {
                    if (offset >= con.limit)
                        return -1;
                    int ch =  target .setIndex(  offset ) ;
                    if (isSet(opts, SINGLE_LINE)) {
                        if (REUtil.isHighSurrogate(ch) && offset+1 < con.limit)
                            offset ++;
                    } else {
                        if (REUtil.isHighSurrogate(ch) && offset+1 < con.limit)
                            ch = REUtil.composeFromSurrogates(ch,  target .setIndex(  ++offset ) );
                        if (isEOLChar(ch))
                            return -1;
                    }
                    offset ++;
                } else {
                    int o1 = offset-1;
                    if (o1 >= con.limit || o1 < 0)
                        return -1;
                    int ch =  target .setIndex(  o1 ) ;
                    if (isSet(opts, SINGLE_LINE)) {
                        if (REUtil.isLowSurrogate(ch) && o1-1 >= 0)
                            o1 --;
                    } else {
                        if (REUtil.isLowSurrogate(ch) && o1-1 >= 0)
                            ch = REUtil.composeFromSurrogates( target .setIndex(  --o1 ) , ch);
                        if (!isEOLChar(ch))
                            return -1;
                    }
                    offset = o1;
                }
                op = op.next;
                break;


            case Op.RANGE:
            case Op.NRANGE:
                if (dx > 0) {
                    if (offset >= con.limit)
                        return -1;
                    int ch =  target .setIndex(  offset ) ;
                    if (REUtil.isHighSurrogate(ch) && offset+1 < con.limit)
                        ch = REUtil.composeFromSurrogates(ch,  target .setIndex(  ++offset ) );
                    RangeToken tok = op.getToken();
                    if (isSet(opts, IGNORE_CASE)) {
                        tok = tok.getCaseInsensitiveToken();
                        if (!tok.match(ch)) {
                            if (ch >= 0x10000)  return -1;
                            char uch;
                            if (!tok.match(uch = Character.toUpperCase((char)ch))
                                && !tok.match(Character.toLowerCase(uch)))
                                return -1;
                        }
                    } else {
                        if (!tok.match(ch))  return -1;
                    }
                    offset ++;
                } else {
                    int o1 = offset-1;
                    if (o1 >= con.limit || o1 < 0)
                        return -1;
                    int ch =  target .setIndex(  o1 ) ;
                    if (REUtil.isLowSurrogate(ch) && o1-1 >= 0)
                        ch = REUtil.composeFromSurrogates( target .setIndex(  --o1 ) , ch);
                    RangeToken tok = op.getToken();
                    if (isSet(opts, IGNORE_CASE)) {
                        tok = tok.getCaseInsensitiveToken();
                        if (!tok.match(ch)) {
                            if (ch >= 0x10000)  return -1;
                            char uch;
                            if (!tok.match(uch = Character.toUpperCase((char)ch))
                                && !tok.match(Character.toLowerCase(uch)))
                                return -1;
                        }
                    } else {
                        if (!tok.match(ch))  return -1;
                    }
                    offset = o1;
                }
                op = op.next;
                break;


            case Op.ANCHOR:
                boolean go = false;
                switch (op.getData()) {
                case '^':
                    if (isSet(opts, MULTIPLE_LINES)) {
                        if (!(offset == con.start
                              || offset > con.start && isEOLChar( target .setIndex(  offset-1 ) )))
                            return -1;
                    } else {
                        if (offset != con.start)
                            return -1;
                    }
                    break;


                case '@':                         // Internal use only.
                    // The @ always matches line beginnings.
                    if (!(offset == con.start
                          || offset > con.start && isEOLChar( target .setIndex(  offset-1 ) )))
                        return -1;
                    break;


                case '$':
                    if (isSet(opts, MULTIPLE_LINES)) {
                        if (!(offset == con.limit
                              || offset < con.limit && isEOLChar( target .setIndex(  offset ) )))
                            return -1;
                    } else {
                        if (!(offset == con.limit
                              || offset+1 == con.limit && isEOLChar( target .setIndex(  offset ) )
                              || offset+2 == con.limit &&  target .setIndex(  offset )  == CARRIAGE_RETURN
                              &&  target .setIndex(  offset+1 )  == LINE_FEED))
                            return -1;
                    }
                    break;


                case 'A':
                    if (offset != con.start)  return -1;
                    break;


                case 'Z':
                    if (!(offset == con.limit
                          || offset+1 == con.limit && isEOLChar( target .setIndex(  offset ) )
                          || offset+2 == con.limit &&  target .setIndex(  offset )  == CARRIAGE_RETURN
                          &&  target .setIndex(  offset+1 )  == LINE_FEED))
                        return -1;
                    break;


                case 'z':
                    if (offset != con.limit)  return -1;

View Full Code Here

    private Parameter[] parse(String pattern) {


        List<Parameter> parameterList = new ArrayList<Parameter>();
        StringBuffer buf = new StringBuffer();


        CharacterIterator sr = new StringCharacterIterator(pattern);


        for (int c=sr.first(); c != CharacterIterator.DONE; c=sr.next()) {
            if (c == '%') {
                int c1 = sr.next();
                if (c1 != '%') {
                    if (buf.length() > 0) {
                        Parameter text = new PlainTextParameter(buf.toString());
                        parameterList.add(text);
                        buf.setLength(0);

View Full Code Here

        }
    }
    if (canAccessClipboard) {
        String label = "";
        if (o instanceof CharacterIterator) {
      CharacterIterator iter = (CharacterIterator) o;
      char[] cbuff = new char[iter.getEndIndex()-iter.getBeginIndex()];
      if (cbuff.length > 0) {
          cbuff[0] = iter.first();
      }
      for (int i=1; i<cbuff.length;++i) {
          cbuff[i] = iter.next();
      }
      label = new String(cbuff);
        }
        Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
        StringSelection selection = new StringSelection(label);

View Full Code Here

     * escape characters
     */
    private void string(Object obj) {
        this.add('"');


        CharacterIterator it = new StringCharacterIterator(obj.toString());


        for (char c = it.first(); c != CharacterIterator.DONE; c = it.next()) {
            if (c == '"') {
                this.add("\\\"");
            } else if (c == '\\') {
                this.add("\\\\");
            } else if (c == '/') {

View Full Code Here

    }


    private String escapeJSON(Object obj) {
        StringBuilder sb = new StringBuilder();


        CharacterIterator it = new StringCharacterIterator(obj.toString());


        for (char c = it.first(); c != CharacterIterator.DONE; c = it.next()) {
            if (c == '"') {
                sb.append("\\\"");
            } else if (c == '\\') {
                sb.append("\\\\");
            } else if (c == '/') {

View Full Code Here

     * If the Word is entirely in upper-case, the word is changed to
     * lower-case (except the characters following - and _)
     * The first letter is always upper-case.
     */
    public static String convertName(String name) {
        CharacterIterator  ci;
        StringBuffer    n = new StringBuffer();
        boolean    up = true;
        boolean    keepCase = false;
        char    c;
        
        // hack need for schema2beans limitation.
        if(name.equals("property")) {
            name = "element-property";
        }
        
        ci = new StringCharacterIterator(name);
        c = ci.first();
        
        // If everything is uppercase, we'll lowercase the name.
        while (c != CharacterIterator.DONE) {
            if (Character.isLowerCase(c)) {
                keepCase = true;
                break;
            }
            c = ci.next();
        }
        
        c = ci.first();
        while (c != CharacterIterator.DONE) {
            if (c == '-' || c == '_')
                up = true;
            else {
                if (up)
                    c = Character.toUpperCase(c);
                else
                    if (!keepCase)
                        c = Character.toLowerCase(c);
                n.append(c);
                up = false;
            }
            c = ci.next();
        }
        return n.toString();
    }

View Full Code Here

     * lower-case (except the characters following - and _)
     * The first letter is always upper-case.
     */
    public static String convertTagName(String name)
    {
        CharacterIterator  ci;
        StringBuffer    n = new StringBuffer();
        boolean    up = true;
        boolean    keepCase = false;
        char    c;
        
        ci = new StringCharacterIterator(name);
        c = ci.first();
        
        // If everything is uppercase, we'll lowercase the name.
        while (c != CharacterIterator.DONE)
        {
            if (Character.isLowerCase(c))
            {
                keepCase = true;
                break;
            }
            c = ci.next();
        }
        
        c = ci.first();
        while (c != CharacterIterator.DONE)
        {
            if (c == '-' || c == '_')
                up = true;
            else
            {
                if (up)
                    c = Character.toUpperCase(c);
                else
                    if (!keepCase)
                        c = Character.toLowerCase(c);
                n.append(c);
                up = false;
            }
            c = ci.next();
        }
        return n.toString();
    } // end of convertTagName()

View Full Code Here

     * If the Word is entirely in upper-case, the word is changed to
     * lower-case (except the characters following - and _)
     * The first letter is always upper-case.
     */
    public static String convertName(String name) {
        CharacterIterator  ci;
        StringBuffer    n = new StringBuffer();
        boolean    up = true;
        boolean    keepCase = false;
        char    c;
        
        // hack need for schema2beans limitation.
        if(name.equals("property")) {
            name = "element-property";
        }
        
        ci = new StringCharacterIterator(name);
        c = ci.first();
        
        // If everything is uppercase, we'll lowercase the name.
        while (c != CharacterIterator.DONE) {
            if (Character.isLowerCase(c)) {
                keepCase = true;
                break;
            }
            c = ci.next();
        }
        
        c = ci.first();
        while (c != CharacterIterator.DONE) {
            if (c == '-' || c == '_')
                up = true;
            else {
                if (up)
                    c = Character.toUpperCase(c);
                else
                    if (!keepCase)
                        c = Character.toLowerCase(c);
                n.append(c);
                up = false;
            }
            c = ci.next();
        }
        return n.toString();
    }

View Full Code Here

     *            The character that is used to clear out strings.
     * @return The text with cleared out internal strings
     */
    public static String clearStrings(String colString, char stringDelimiter, char replaceChar) {


        CharacterIterator it = new StringCharacterIterator(colString);
        StringBuffer out = new StringBuffer();
        boolean inAString = false;
        char prevChar = ' ';
        for (char c = it.first(); c != CharacterIterator.DONE; c = it.next()) {
            // Look for string introducor
            if (c == stringDelimiter && prevChar != '\\') {
                inAString = !inAString;
                out.append(stringDelimiter);
            }

View Full Code Here

     * If the Word is entirely in upper-case, the word is changed to
     * lower-case (except the characters following - and _)
     * The first letter is always upper-case.
     */
    private static String convertName(String name) {
        CharacterIterator  ci;
        StringBuffer    n = new StringBuffer();
        boolean    up = true;
        boolean    keepCase = false;
        char    c;
        
        // hack need for schema2beans limitation.
        if(name.equals("property")) {
            name = "element-property";
        }
        
        ci = new StringCharacterIterator(name);
        c = ci.first();
        
        // If everything is uppercase, we'll lowercase the name.
        while (c != CharacterIterator.DONE) {
            if (Character.isLowerCase(c)) {
                keepCase = true;
                break;
            }
            c = ci.next();
        }
        
        c = ci.first();
        while (c != CharacterIterator.DONE) {
            if (c == '-' || c == '_')
                up = true;
            else {
                if (up)
                    c = Character.toUpperCase(c);
                else
                    if (!keepCase)
                        c = Character.toLowerCase(c);
                n.append(c);
                up = false;
            }
            c = ci.next();
        }
        return n.toString();
    }

View Full Code Here

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