Examples of net.sf.saxon.om.FastStringBuffer

net.sf.saxon.om.FastStringBuffer
A simple implementation of a class similar to StringBuffer. Unlike StringBuffer it is not synchronized. It also offers the capability to remove unused space. (This class could possibly be replaced by StringBuilder in JDK 1.5, but using our own class gives more control.)

        if (picture==null || picture.length()==0) {
            return "" + number;
        }


        int pictureLength = StringValue.getStringLength(picture);
        FastStringBuffer sb = new FastStringBuffer(FastStringBuffer.TINY);
        int formchar = picture.charAt(0);
        if (UTF16CharacterSet.isHighSurrogate(formchar)) {
            formchar = UTF16CharacterSet.combinePair((char)formchar, picture.charAt(1));
        }


        switch(formchar) {


        case '0':
        case '1':
            sb.append(toRadical(number, westernDigits, pictureLength, groupSize, groupSeparator));
            if (ordinal != null && ordinal.length() > 0) {
                sb.append(ordinalSuffix(ordinal, number));
            }
            break;


        case 'A':
            if (number==0) {
                return "0";
            }
            return toAlphaSequence(number, latinUpper);


        case 'a':
            if (number==0) {
                return "0";
            }
            return toAlphaSequence(number, latinLower);


        case 'w':
        case 'W':
            int wordCase;
            if (picture.equals("W")) {
                wordCase = UPPER_CASE;
            } else if (picture.equals("w")) {
                wordCase = LOWER_CASE;
            } else {
                // includes cases like "ww" or "Wz". The action here is conformant, but it's not clear what's best
                wordCase = TITLE_CASE;
            }
            if (ordinal != null && ordinal.length() > 0) {
                return toOrdinalWords(ordinal, number, wordCase);
            } else {
                return toWords(number, wordCase);
            }


        case 'i':
            if (number==0) {
                return "0";
            }
            if (letterValue==null || letterValue.length() == 0 ||
                    letterValue.equals("traditional")) {
                return toRoman(number);
            } else {
                alphaDefault(number, 'i', sb);
            }
            break;


        case 'I':
            if (number==0) {
                return "0";
            }
            if (letterValue==null || letterValue.length() == 0 ||
                    letterValue.equals("traditional")) {
                return toRoman(number).toUpperCase();
            } else {
                alphaDefault(number, 'I', sb);
            }
            break;


        case '\u2460':
            // circled digits
            if (number == 0 || number > 20) {
                return "" + number;
            }
            return "" + (char)(0x2460 + number);


        case '\u2474':
            // parenthesized digits
            if (number == 0 || number > 20) {
                return "" + number;
            }
            return "" + (char)(0x2474 + number);


        case '\u2488':
            // digit full stop
            if (number == 0 || number > 20) {
                return "" + number;
            }
            return "" + (char)(0x2488 + number);             


        case '\u0391':
            if (number==0) {
                return "0";
            }
            return toAlphaSequence(number, greekUpper);


        case '\u03b1':
            if (number==0) {
                return "0";
            }
            return toAlphaSequence(number, greekLower);


        case '\u0410':
            if (number==0) {
                return "0";
            }
            return toAlphaSequence(number, cyrillicUpper);


        case '\u0430':
            if (number==0) {
                return "0";
            }
            return toAlphaSequence(number, cyrillicLower);


        case '\u05d0':
            if (number==0) {
                return "0";
            }
            return toAlphaSequence(number, hebrew);


        case '\u3042':
            if (number==0) {
                return "0";
            }
            return toAlphaSequence(number, hiraganaA);


        case '\u30a2':
            if (number==0) {
                return "0";
            }
            return toAlphaSequence(number, katakanaA);


        case '\u3044':
            if (number==0) {
                return "0";
            }
            return toAlphaSequence(number, hiraganaI);


        case '\u30a4':
            if (number==0) {
                return "0";
            }
            return toAlphaSequence(number, katakanaI);


        case '\u4e00':
            if (number==0) {
                return "0";
            }
            return toRadical(number, kanjiDigits, pictureLength, groupSize, groupSeparator);


        default:


            int digitValue = Alphanumeric.getDigitValue(formchar);
            if (digitValue >= 0) {


                int zero = formchar - digitValue;
                int[] digits = new int[10];
                for (int z=0; z<=9; z++) {
                    digits[z] = zero+z;
                }                                     


                return toRadical(number, digits, pictureLength, groupSize, groupSeparator);


            } else {
                if (number==0) return "0";
                if (formchar < '\u1100') {
                    alphaDefault(number, (char)formchar, sb);
                } else {
                    // fallback to western numbering
                    return
                        toRadical(number, westernDigits, pictureLength, groupSize, groupSeparator);
                }
                break;


            }
        }


        return sb.toString();
    }

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                        // null should no longer be returned, but the spec has changed, so it's
                        // better to be defensive
                return new AnyURIValue(s);


            case GENERATE_ID:
                FastStringBuffer buffer = new FastStringBuffer(FastStringBuffer.TINY);
                node.generateId(buffer);
                buffer.condense();
                return new StringValue(buffer);


            case DOCUMENT_URI:
                // If the node is in the document pool, get the URI under which it is registered.
                // Otherwise, return its systemId.

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        // for example "\", must be %-encoded.
        if (allAllowedAscii(s)) {
            // it's worth doing a prescan to avoid the cost of copying in the common all-ASCII case
            return s;
        }
        FastStringBuffer sb = new FastStringBuffer(s.length()+20);
        for (int i=0; i<s.length(); i++) {
            final char c = s.charAt(i);
            if (c>=0x7f || !allowedASCII[(int)c]) {
                escapeChar(c, ((i+1)<s.length() ? s.charAt(i+1) : ' '), sb);
            } else {
                sb.append(c);
            }
        }
        return sb;
    }

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     * should NOT be %HH-encoded
     * @return the %HH-encoded string
     */


    public static CharSequence escape(CharSequence s, String allowedPunctuation) {
        FastStringBuffer sb = new FastStringBuffer(s.length());
        for (int i=0; i<s.length(); i++) {
            char c = s.charAt(i);
            if ((c>='a' && c<='z') || (c>='A' && c<='Z') || (c>='0' && c<='9')) {
                sb.append(c);
            } else if (c<=0x20 || c>=0x7f) {
                escapeChar(c, ((i+1)<s.length() ? s.charAt(i+1) : ' '), sb);
            } else if (allowedPunctuation.indexOf(c) >= 0) {
                sb.append(c);
            } else {
                escapeChar(c, ' ', sb);
            }


        }

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                         int groupSize,
                         String groupSeparator,
                         String letterValue,
                         String ordinal) {


        FastStringBuffer sb = new FastStringBuffer(16);
        int formchar = picture.charAt(0);
        if (UTF16CharacterSet.isHighSurrogate(formchar)) {
            formchar = UTF16CharacterSet.combinePair((char)formchar, picture.charAt(1));
        }


        /* only catch traditional formatting. */
        if (!"traditional".equals(letterValue)) {
          return super.format(number, picture, groupSize, groupSeparator, letterValue, ordinal);
        }


        switch(formchar) {
        case '\u05d0':
            if (number==0) return "0";
            sb.append(toTraditionalSequence(number, groupSeparator));
            break;
        default:
          return super.format(number, picture, groupSize, groupSeparator, letterValue, ordinal);
        }


        return sb.toString();
    }

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    private static CharSequence formatDate(CalendarValue value, String format, String language, String country, XPathContext context)
    throws XPathException {


        Numberer numberer = context.getConfiguration().makeNumberer(language, country);
        FastStringBuffer sb = new FastStringBuffer(FastStringBuffer.SMALL);
        if (numberer instanceof Numberer_en && !"en".equals(language)) {
            sb.append("[Language: en]");
        }
        int i = 0;
        while (true) {
            while (i < format.length() && format.charAt(i) != '[') {
                sb.append(format.charAt(i));
                if (format.charAt(i) == ']') {
                    i++;
                    if (i == format.length() || format.charAt(i) != ']') {
                        XPathException e = new XPathException("Closing ']' in date picture must be written as ']]'");
                        e.setErrorCode("XTDE1340");
                        e.setXPathContext(context);
                        throw e;
                    }
                }
                i++;
            }
            if (i == format.length()) {
                break;
            }
            // look for '[['
            i++;
            if (i < format.length() && format.charAt(i) == '[') {
                sb.append('[');
                i++;
            } else {
                int close = (i < format.length() ? format.indexOf("]", i) : -1);
                if (close == -1) {
                    XPathException e = new XPathException("Date format contains a '[' with no matching ']'");
                    e.setErrorCode("XTDE1340");
                    e.setXPathContext(context);
                    throw e;
                }
                String componentFormat = format.substring(i, close);
                sb.append(formatComponent(value, Whitespace.removeAllWhitespace(componentFormat), numberer, context));
                i = close+1;
            }
        }
        return sb;
    }

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     * @param context the evaluation context
     * @throws net.sf.saxon.trans.XPathException if any of the integers is not the codepoint of a valid XML character
    */


    public static CharSequence unicodeToString(SequenceIterator chars, XPathContext context) throws XPathException {
        FastStringBuffer sb = new FastStringBuffer(FastStringBuffer.SMALL);
        NameChecker checker = context.getConfiguration().getNameChecker();
        while (true) {
            NumericValue nextInt = (NumericValue)chars.next();
            if (nextInt == null) {
                return sb.condense();
            }
            long next = nextInt.longValue();
            if (next < 0 || next > Integer.MAX_VALUE || !checker.isValidChar((int)next)) {
                XPathException e = new XPathException("Invalid XML character [x " + Integer.toHexString((int)next) + ']');
                e.setErrorCode("FOCH0001");
                if (context instanceof XPathContext) {
                    e.setXPathContext((XPathContext)context);
                }
                throw e;
            }
            if (next<65536) {
                sb.append((char)next);
            } else {  // output a surrogate pair
                sb.append(UTF16CharacterSet.highSurrogate((int)next));
                sb.append(UTF16CharacterSet.lowSurrogate((int)next));
            }
        }
    }

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    * Evaluate in a general context
    */


    public Item evaluateItem(XPathContext c) throws XPathException {
        int numArgs = argument.length;
        FastStringBuffer sb = new FastStringBuffer(FastStringBuffer.SMALL);
        for (int i=0; i<numArgs; i++) {
            AtomicValue val = (AtomicValue)argument[i].evaluateItem(c);
            if (val!=null) {
                sb.append(val.getStringValueCS());
            }
        }
        return StringValue.makeStringValue(sb.condense());
    }

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            min = range[0];
            max = range[1];
            if (defaultFormat) {
                // if format was defaulted, the explicit widths override the implicit format
                if (primary.endsWith("1") && min != primary.length()) {
                    FastStringBuffer sb = new FastStringBuffer(min+1);
                    for (int i=1; i<min; i++) {
                        sb.append('0');
                    }
                    sb.append('1');
                    primary = sb.toString();
                }
            }
        }


        if ("P".equals(component)) {

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                return tzname;
            } else {
                return NamedTimeZone.getOlsenTimeZoneName(value, country);
            }
        }
        FastStringBuffer sbz = new FastStringBuffer(8);
        value.appendTimezone(sbz);
        return sbz.toString();
    }

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