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.)

        }
        return highRanges.toString();
    }


    protected static String lowSurrogateRanges(List ranges) {
        FastStringBuffer lowRanges = new FastStringBuffer(ranges.size() * 2);
        for (int i = 0, len = ranges.size(); i < len; i++) {
            Range r = (Range)ranges.get(i);
            char min1 = UTF16.highSurrogate(r.getMin());
            char min2 = UTF16.lowSurrogate(r.getMin());
            char max1 = UTF16.highSurrogate(r.getMax());
            char max2 = UTF16.lowSurrogate(r.getMax());
            if (min1 == max1) {
                if (min2 != UTF16.SURROGATE2_MIN || max2 != UTF16.SURROGATE2_MAX) {
                    lowRanges.append(min1);
                    lowRanges.append(min2);
                    lowRanges.append(max2);
                }
            } else {
                if (min2 != UTF16.SURROGATE2_MIN) {
                    lowRanges.append(min1);
                    lowRanges.append(min2);
                    lowRanges.append(UTF16.SURROGATE2_MAX);
                }
                if (max2 != UTF16.SURROGATE2_MAX) {
                    lowRanges.append(max1);
                    lowRanges.append(UTF16.SURROGATE2_MIN);
                    lowRanges.append(max2);
                }
            }
        }
        return lowRanges.toString();
    }

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     * supplied in the argument, this will be the same buffer.
     */


    public FastStringBuffer uncompress(FastStringBuffer buffer) {
        if (buffer == null) {
            buffer = new FastStringBuffer(length());
        }
        uncompress(value, buffer);
        return buffer;
    }

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    * of size maxAllocation.
    */
    public LargeStringBuffer(int minAllocation, int maxAllocation) {
        this.minAllocation = Math.min(minAllocation, maxAllocation);
        this.maxAllocation = maxAllocation;
        FastStringBuffer initial = new FastStringBuffer(minAllocation);
        segments = new ArrayList(4);
        segments.add(initial);
        startOffsets = new int[1];
        startOffsets[0] = 0;
        length = 0;

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    public void append(CharSequence data) {
        final int increment = data.length();
        if (increment == 0) {
            return;
        }
        FastStringBuffer last = ((FastStringBuffer)segments.get(segments.size()-1));
        if (last.length() + increment <= maxAllocation) {
            last.append(data);
        } else {
            int[] s2 = new int[startOffsets.length+1];
            System.arraycopy(startOffsets, 0, s2, 0, startOffsets.length);
            s2[startOffsets.length] = length;
            startOffsets = s2;
            last = new FastStringBuffer(Math.max(minAllocation, increment));
            segments.add(last);
            last.append(data);
        }
        length += increment;
    }

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            offset1 = 0;
        } else {
            seg1 = -seg1 - 2;
            offset1 = end - startOffsets[seg1];
        }
        FastStringBuffer startSegment = (FastStringBuffer)segments.get(seg0);
        // We've had reports (28 Feb 2007) of an NPE here, which we couldn't reproduce.
        // The following code is designed to produce diagnostics if it ever happens again
        if (startSegment == null) {
            dumpDataStructure();
            throw new NullPointerException("startSegment: subSequence(" + start + ", " + end + ")");
        }
        if (seg0 == seg1) {
            // the required substring is all in one segment
            return startSegment.subSequence(offset0, offset1);
        } else {
            // copy the data into a new FastStringBuffer. This case should be exceptional
            FastStringBuffer sb = new FastStringBuffer(end - start);
            sb.append(startSegment.subSequence(offset0, startSegment.length()));
            for (int i=seg0+1; i<seg1; i++) {
                sb.append(((FastStringBuffer)segments.get(i)));
            }
            if (offset1 > 0) {
                sb.append(((FastStringBuffer)segments.get(seg1)).subSequence(0, offset1));
            }
            return sb;
        }
    }

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    public String toString() {
        if (startOffsets.length == 1) {
            // optimize for small documents
            return segments.get(0).toString();
        }
        FastStringBuffer sb = new FastStringBuffer(length);
        for (int i=0; i<segments.size(); i++) {
            sb.append(((FastStringBuffer)segments.get(i)));
        }
        return sb.toString();
    }

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    public int hashCode() {
        // Same algorithm as String#hashCode(), but not cached
        int h = 0;
        for (int s=0; s<segments.size(); s++) {
            FastStringBuffer sb = ((FastStringBuffer)segments.get(s));
            for (int i=0; i<sb.length(); i++) {
                h = 31 * h + charAt(i);
            }
        }
        return h;
    }

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     * @param writer the writer to which the value is to be written
     */


    public void write(Writer writer) throws java.io.IOException {
        for (int s=0; s<segments.size(); s++) {
            FastStringBuffer sb = ((FastStringBuffer)segments.get(s));
            sb.write(writer);
        }
    }

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     */
    public static String wrap(CharSequence cs, int valueType) {
        if (cs == null) {
            return "(NULL)";
        }
        FastStringBuffer sb = new FastStringBuffer(40);
        int len = cs.length();
        for (int i=0; i<len; i++) {
            char c = cs.charAt(i);
            switch (c) {
                case '\n':
                    sb.append("\\n");
                    break;
                case '\t':
                    sb.append("\\t");
                    break;
                case '\r':
                    sb.append("\\r");
                    break;
//                case '\\':
//                    sb.append("\\\\");
//                    break;
                default:
                    if (c < 32 || c > 255) {
                        sb.append("\\u");
                        String hex = Integer.toHexString(c);
                        while (hex.length() < 4) {
                            hex = "0" + hex;
                        }
                        sb.append(hex);
                    } else {
                        sb.append(c);
                    }
            }
        }
        String s;
        if (len > 30) {
            if (valueType == URI) {
                s = "..." + sb.toString().substring(len-30);
            } else {
                s = sb.toString().substring(0, 30) + "...";
            }
        } else {
            s = sb.toString();
        }
        switch (valueType) {
            case ELEMENT:
                return "<" + s + ">";
            case ATTRIBUTE:

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    */


    public void processingInstruction (String piname, CharSequence remainder, int locationId, int properties) throws XPathException
    {
        if (tree.commentBuffer==null) {
            tree.commentBuffer = new FastStringBuffer(200);
        }
        int s = tree.commentBuffer.length();
        tree.commentBuffer.append(remainder.toString());
        int nameCode = namePool.allocate("", "", piname);

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