Examples of org.pdf4j.saxon.om.FastStringBuffer

org.pdf4j.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.)

     * @param value the actual value
     * @return the value converted to a string, according to the XPath casting rules.
     */


    public static CharSequence doubleToString(double value) {
        return FloatingPointConverter.appendDouble(new FastStringBuffer(20), value);
    }

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            out.println(label + "EndDocument");
        } else if (pe instanceof EndElementEvent) {
            label = label.substring(2);
            out.println(label + "EndElement");
        } else if (pe instanceof NodeInfo) {
            FastStringBuffer fsb = new FastStringBuffer(80);
            fsb.append(label);
            int kind = ((NodeInfo)pe).getNodeKind();
            fsb.append(NodeKindTest.toString(kind));
            if (kind == Type.ELEMENT || kind == Type.ATTRIBUTE) {
                fsb.append(' ');
                fsb.append(((NodeInfo)pe).getDisplayName());
            }
            fsb.append(" \"");
            fsb.append(((NodeInfo)pe).getStringValueCS());
            fsb.append('"');
            out.println(fsb.toString());
        } else if (pe instanceof AtomicValue) {
            out.println(label + Type.displayTypeName((AtomicValue)pe) + ' ' + pe);
        } else if (pe instanceof EventIterator) {
            out.println(label + "** NESTED ITERATOR **");
        } else {

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     */


    private String makeKey(StructuredQName functionName, int arity) {
        String uri = functionName.getNamespaceURI();
        String local = functionName.getLocalName();
        FastStringBuffer sb = new FastStringBuffer(uri.length() + local.length() + 8);
        sb.append('{');
        sb.append(uri);
        sb.append('}');
        sb.append(local);
        sb.append("/" + arity);
        return sb.toString();
    }

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                        case Type.TEXT:
                            if (pendingTextNode == null) {
                                pendingTextNode = (NodeInfo)e;
                                pendingTextNodeIsMutable = false;
                            } else if (pendingTextNodeIsMutable) {
                                FastStringBuffer sb = (FastStringBuffer)((Orphan)pendingTextNode).getStringValueCS();
                                sb.append(((NodeInfo)e).getStringValueCS());
                            } else {
                                Orphan o = new Orphan(config);
                                o.setNodeKind(Type.TEXT);
                                FastStringBuffer sb = new FastStringBuffer(40);
                                sb.append(pendingTextNode.getStringValueCS());
                                sb.append(((NodeInfo)e).getStringValueCS());
                                o.setStringValue(sb);
                                pendingTextNode = o;
                                pendingTextNodeIsMutable = true;
                            }
                            continue;
                        default:
                            if (pendingTextNode != null) {
                                pendingOutput = e;
                                PullEvent next = pendingTextNode;
                                pendingTextNode = null;
                                return next;
                            } else {
                                return e;
                            }
                    }
                } else if (e instanceof AtomicValue) {
                    if (prevAtomic) {
                        FastStringBuffer sb = (FastStringBuffer)((Orphan)pendingTextNode).getStringValueCS();
                        sb.append(' ');
                        sb.append(((AtomicValue)e).getStringValueCS());
                    } else if (pendingTextNode != null) {
                        prevAtomic = true;
                        if (pendingTextNodeIsMutable) {
                            FastStringBuffer sb = (FastStringBuffer)((Orphan)pendingTextNode).getStringValueCS();
                            sb.append(((AtomicValue)e).getStringValueCS());
                        } else {
                            Orphan o = new Orphan(config);
                            o.setNodeKind(Type.TEXT);
                            FastStringBuffer sb = new FastStringBuffer(40);
                            sb.append(pendingTextNode.getStringValueCS());
                            sb.append(((AtomicValue)e).getStringValueCS());
                            o.setStringValue(sb);
                            pendingTextNode = o;
                            pendingTextNodeIsMutable = true;
                        }
                    } else {
                        prevAtomic = true;
                        Orphan o = new Orphan(config);
                        o.setNodeKind(Type.TEXT);
                        FastStringBuffer sb = new FastStringBuffer(40);
                        sb.append(((AtomicValue)e).getStringValueCS());
                        o.setStringValue(sb);
                        pendingTextNode = o;
                        pendingTextNodeIsMutable = true;
                    }
                    //continue;

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     * Character data
     */


    public void characters(CharSequence chars, int locationId, int properties) throws XPathException {
        System.err.println("RCVR " + id + indent + " CHARACTERS " + (Whitespace.isWhite(chars) ? "(whitespace)" : ""));
        FastStringBuffer sb = new FastStringBuffer(chars.length() * 3);
        for (int i=0; i<chars.length(); i++) {
            sb.append((int)chars.charAt(i) + " ");
        }
        System.err.println("    \"" + sb + '\"');
        nextReceiver.characters(chars, locationId, properties);
    }

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        }
        return url;
    }


    private static CharSequence reallyEscapeURL(CharSequence url) {
        FastStringBuffer sb = new FastStringBuffer(url.length() + 20);
        final String hex = "0123456789ABCDEF";
        byte[] array = new byte[4];


        for (int i=0; i<url.length(); i++) {
            char ch = url.charAt(i);
            if (ch<32 || ch>126) {
                int used = UnicodeCharacterSet.getUTF8Encoding(ch,
                                                 (i+1 < url.length() ? url.charAt(i+1): ' '), array);
                for (int b=0; b<used; b++) {
                    //int v = (array[b]>=0 ? array[b] : 256 + array[b]);
                    int v = ((int)array[b]) & 0xff;
                    sb.append('%');
                    sb.append(hex.charAt(v/16));
                    sb.append(hex.charAt(v%16));
                }


            } else {
                sb.append(ch);
            }
        }
        return sb;
    }

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     */


    // Modified by MHK. Original code assumed the characters were each 4 hex digits!


    public static String fromHex(String source) {
        FastStringBuffer result = new FastStringBuffer(5);
        for (int i = 0; i < source.length(); ++i) {
            char c = source.charAt(i);
            switch (c) {
              case ' ': break; // ignore
              case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7':
              case '8': case '9': case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
              case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
                    int z = source.indexOf(' ',i);
                    if (z < 0) {
                        z = source.length();
                    }
                    try {
                        result.append((char)Integer.parseInt(source.substring(i, z),16));
                    } catch (NumberFormatException e) {
                        throw new IllegalArgumentException("Bad hex value in " + source);
                    }
                    i = z; // skip rest of number
                break;
              case '<': int j = source.indexOf('>',i); // skip <...>
                if (j > 0) {
                    i = j;
                    break;
                } // else fall through--error
              default:
                throw new IllegalArgumentException("Bad hex value in " + source);
            }
        }
        return result.toString();
    }

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    /**
     * Utility: Supplies a zero-padded hex representation of a Unicode character (without 0x, \\u)
     */
  public static String hex(String s, String sep) {
      FastStringBuffer result = new FastStringBuffer(20);
      for (int i = 0; i < s.length(); ++i) {
          if (i != 0) result.append(sep);
          result.append(hex(s.charAt(i)));
      }
      return result.toString();
  }

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     * Output an array of integer values
     */


    private static void printArray(PrintStream o, Iterator iter) {
        int count = 0;
        FastStringBuffer buff = new FastStringBuffer(120);
        if (!iter.hasNext()) return;
        buff.append('"');
        while (true) {
            if (++count == 20) {
                count = 0;
                buff.append("\",");
                o.println(buff.toString());
                buff.setLength(0);
                buff.append('"');
            }
            int next = ((Integer)iter.next()).intValue();
            buff.append(Integer.toString(next, 32));    // values are written in base-32 notation
            if (iter.hasNext()) {
                buff.append(",");
            } else {
                buff.append("\"");
                o.println(buff.toString());
                return;
            }
        }
    }

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     * Output an array of string values (using backslash-uuuu notation where appropriate)
     */


    private static void printStringArray(PrintStream o, Iterator iter) {
        int count = 0;
        FastStringBuffer buff = new FastStringBuffer(120);
        if (!iter.hasNext()) return;
        while (true) {
            if (++count == 20) {
                count = 0;
                o.println(buff.toString());
                buff.setLength(0);
            }
            String next = (String)iter.next();
            appendJavaString(next, buff);
            if (iter.hasNext()) {
                buff.append(", ");
            } else {
                o.println(buff.toString());
                return;
            }
        }
    }

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