xmlelement.java

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   * @param key  Description of Parameter
   */
  public void removeChild(String key) {
    if (this.ignoreCase) {
      key = key.toUpperCase();
    }

    this.attributes.remove(key);
  }


  /**
   * Writes the XML element to a string.
   *
   * @return   Description of the Returned Value
   */
  public String toString() {
    StringWriter writer = new StringWriter();
    this.write(writer);
    return writer.toString();
  }


  /**
   * Writes the XML element to a writer.
   *
   * @param writer  Description of Parameter
   */
  public void write(Writer writer) {
    this.write(writer, 0);
  }


  /**
   * Writes the XML element to a writer.
   *
   * @param writer  Description of Parameter
   * @param indent  Description of Parameter
   */
  public void write(Writer writer,
      int indent) {
    PrintWriter out = new PrintWriter(writer);

    for (int i = 0; i < indent; i++) {
      out.print(' ');
    }

    if (this.tagName == null) {
      this.writeEncoded(out, this.contents);
      return;
    }

    out.print('<');
    out.print(this.tagName);

    if (!this.attributes.isEmpty()) {
      Enumeration enum = this.attributes.keys();

      while (enum.hasMoreElements()) {
        out.print(' ');
        String key = (String) (enum.nextElement());
        String value = (String) (this.attributes.get(key));
        out.print(key);
        out.print("=\"");
        this.writeEncoded(out, value);
        out.print('"');
      }
    }

    if ((this.contents != null) && (this.contents.length() > 0)) {
      if (this.skipLeadingWhitespace) {
        out.println('>');

        for (int i = 0; i < indent + 4; i++) {
          out.print(' ');
        }

        out.println(this.contents);

        for (int i = 0; i < indent; i++) {
          out.print(' ');
        }
      }
      else {
        out.print('>');
        this.writeEncoded(out, this.contents);
      }

      out.print("</");
      out.print(this.tagName);
      out.println('>');
    }
    else if (this.children.isEmpty()) {
      out.println("/>");
    }
    else {
      out.println('>');
      Enumeration enum = this.enumerateChildren();

      while (enum.hasMoreElements()) {
        XMLElement child = (XMLElement) (enum.nextElement());
        child.write(writer, indent + 4);
      }

      for (int i = 0; i < indent; i++) {
        out.print(' ');
      }

      out.print("</");
      out.print(this.tagName);
      out.println('>');
    }
  }


  /**
   * !!! Searches the content for child objects. If such objects exist, the
   * content is reduced to <CODE>null</CODE>.
   *
   * @param input                          Description of Parameter
   * @param contentOffset                  Description of Parameter
   * @param contentSize                    Description of Parameter
   * @param contentLineNr                  Description of Parameter
   * @exception XMLParseException          Description of Exception
   * @see                                  nanoxml.XMLElement#parseCharArray
   */
  protected void scanChildren(char[] input,
      int contentOffset,
      int contentSize,
      int contentLineNr)
       throws XMLParseException {
    int end = contentOffset + contentSize;
    int offset = contentOffset;
    int lineNr[] = new int[1];
    lineNr[0] = contentLineNr;

    while (offset < end) {
      try {
        offset = this.skipWhitespace(input, offset, end, lineNr);
      } catch (XMLParseException e) {
        return;
      }

      if ((input[offset] != '<')
          || ((input[offset + 1] == '!') && (input[offset + 2] == '['))) {
        return;
      }

      XMLElement child = this.createAnotherElement();
      offset = child.parseCharArray(input, offset, end, lineNr);
      this.children.addElement(child);
    }
  }


  /**
   * Creates a new XML element.
   *
   * @return   Description of the Returned Value
   */
  protected XMLElement createAnotherElement() {
    return new XMLElement(this.conversionTable,
        this.skipLeadingWhitespace,
        false,
        this.ignoreCase);
  }


  /**
   * Skips a tag that don't contain any useful data: &lt;?...?&gt;, &lt;!...&gt;
   * and comments.
   *
   * @param input                          Description of Parameter
   * @param offset                         Description of Parameter
   * @param end                            Description of Parameter
   * @param lineNr                         Description of Parameter
   * @return                               the position after the tag
   */
  protected int skipBogusTag(char[] input,
      int offset,
      int end,
      int[] lineNr) {
    int level = 1;

    while (offset < end) {
      char ch = input[offset++];

      switch (ch) {
        case '\r':
          if ((offset < end) && (input[offset] == '\n')) {
            offset++;
          }

          lineNr[0]++;
          break;
        case '\n':
          lineNr[0]++;
          break;
        case '<':
          level++;
          break;
        case '>':
          level--;

          if (level == 0) {
            return offset;
          }

          break;
        default:
      }
    }

    throw this.unexpectedEndOfData(lineNr[0]);
  }


  /**
   * Converts &amp;...; sequences to "normal" chars.
   *
   * @param s       Description of Parameter
   * @param lineNr  Description of Parameter
   * @return        Description of the Returned Value
   */
  protected String decodeString(String s,
      int lineNr) {
    StringBuffer result = new StringBuffer(s.length());
    int index = 0;

    while (index < s.length()) {
      int index2 = (s + '&').indexOf('&', index);
      int index3 = (s + "<![CDATA[").indexOf("<![CDATA[", index);

      if (index2 <= index3) {
        result.append(s.substring(index, index2));

        if (index2 == s.length()) {
          break;
        }

        index = s.indexOf(';', index2);

        if (index < 0) {
          result.append(s.substring(index2));
          break;
        }

        String key = s.substring(index2 + 1, index);

        if (key.charAt(0) == '#') {
          if (key.charAt(1) == 'x') {
            result.append((char) (
                Integer.parseInt(key.substring(2),
                16)));
          }
          else {
            result.append((char) (
                Integer.parseInt(key.substring(1),
                10)));
          }
        }
        else {
          result.append(this.conversionTable
              .getProperty(key, "&" + key + ';'));
        }
      }
      else {
        int index4 = (s + "]]>").indexOf("]]>", index3 + 9);
        result.append(s.substring(index, index3));
        result.append(s.substring(index3 + 9, index4));
        index = index4 + 2;
      }

      index++;
    }

    return result.toString();
  }


  /**
   * Writes a string encoded to a writer.
   *
   * @param out  Description of Parameter
   * @param str  Description of Parameter
   */
  protected void writeEncoded(PrintWriter out,
      String str) {
    for (int i = 0; i < str.length(); i++) {
      char ch = str.charAt(i);

      switch (ch) {
        case '<':
          out.write("&lt;");
          break;
        case '>':
          out.write("&gt;");
          break;
        case '&':
          out.write("&amp;");
          break;
        case '"':
          out.write("&quot;");
          break;
        case '\'':
          out.write("&apos;");
          break;
        case '\r':
        case '\n':
          out.write(ch);
          break;
        default:
          if (((int) ch < 32) || ((int) ch > 126)) {
            out.write("&#x");
            out.write(Integer.toString((int) ch, 16));
            out.write(';');
          }
          else {
            out.write(ch);
          }
      }
    }
  }


  /**
   * Checks whether a character may be part of an identifier.
   *
   * @param ch  Description of Parameter
   * @return    The IdentifierChar value
   */
  private boolean isIdentifierChar(char ch) {
    return (((ch >= 'A') && (ch <= 'Z')) || ((ch >= 'a') && (ch <= 'z'))
        || ((ch >= '0') && (ch <= '9')) || (".-_:".indexOf(ch) >= 0));
  }


  /**
   * Parses an XML definition starting at <I>offset</I> .
   *
   * @param input                          Description of Parameter
   * @param offset                         Description of Parameter
   * @param end                            Description of Parameter
   * @param currentLineNr                  Description of Parameter
   * @return                               the offset of the array following the
   *      XML data (<= end)
   * @exception XMLParseException          Description of Exception
   */
  private int parseCharArray(char[] input,
      int offset,
      int end,
      int[] currentLineNr)
       throws XMLParseException {
    this.lineNr = currentLineNr[0];
    this.tagName = null;
    this.contents = null;
    this.attributes = new Properties();
    this.children = new Vector();

    try {
      offset = this.skipWhitespace(input, offset, end, currentLineNr);
    } catch (XMLParseException e) {
      return offset;
    }

    offset = this.skipPreamble(input, offset, end, currentLineNr);
    offset = this.scanTagName(input, offset, end, currentLineNr);
    this.lineNr = currentLineNr[0];
    offset = this.scanAttributes(input, offset, end, currentLineNr);
    int[] contentOffset = new int[1];
    int[] contentSize = new int[1];
    int contentLineNr = currentLineNr[0];
    offset = this.scanContent(input, offset, end,
        contentOffset, contentSize, currentLineNr);

    if (contentSize[0] > 0) {
      this.scanChildren(input, contentOffset[0], contentSize[0],
          contentLineNr);

      if (this.children.size() > 0) {
        this.contents = null;
      }
      else {
        this.processContents(input, contentOffset[0],
            contentSize[0], contentLineNr);
        for (int i = 0; i < contentSize[0]; i++) {
          if (input[contentOffset[0] + i] > ' ') {
            return offset;
          }
        }

        this.contents = null;
      }
    }

    return offset;
  }


  /**
   * Decodes the entities in the contents and, if skipLeadingWhitespace is
   * <CODE>true</CODE>, removes extraneous whitespaces after newlines and
   * convert those newlines into spaces.
   *
   * @param input                          Description of Parameter
   * @param contentOffset                  Description of Parameter
   * @param contentSize                    Description of Parameter
   * @param contentLineNr                  Description of Parameter
   * @exception XMLParseException          Description of Exception
   * @see                                  nanoxml.XMLElement#decodeString
   */
  private void processContents(char[] input,
      int contentOffset,
      int contentSize,
      int contentLineNr)
       throws XMLParseException {
    int[] lineNr = new int[1];
    lineNr[0] = contentLineNr;

    if (!this.skipLeadingWhitespace) {
      String str = new String(input, contentOffset, contentSize);
      this.contents = this.decodeString(str, lineNr[0]);
      return;
    }

    StringBuffer result = new StringBuffer(contentSize);
    int end = contentSize + contentOffset;

    for (int i = contentOffset; i < end; i++) {
      char ch = input[i];

      // The end of the contents is always a < character, so there's
      // no danger for bounds violation
      while ((ch == '\r') || (ch == '\n')) {
        lineNr[0]++;
        result.append(ch);

        i++;
        ch = input[i];

        if (ch != '\n') {
          result.append(ch);
        }

        do {
          i++;
          ch = input[i];
        } while ((ch == ' ') || (ch == '\t'));
      }

      if (i < end) {
        result.append(ch);
      }
    }

    this.contents = this.decodeString(result.toString(), lineNr[0]);
  }


  /**
   * Scans the attributes of the object.
   *
   * @param input                          Description of Parameter
   * @param offset                         Description of Parameter
   * @param end                            Description of Parameter
   * @param lineNr                         Description of Parameter
   * @return                               the offset in the string following
   *      the attributes, so that input[offset] in { '/', '>' }
   * @exception XMLParseException          Description of Exception
   * @see                                  nanoxml.XMLElement#scanOneAttribute
   */
  private int scanAttributes(char[] input,
      int offset,
      int end,
      int[] lineNr)
       throws XMLParseException {
    //    String key;
    //    String value;

    for (; ; ) {
      offset = this.skipWhitespace(input, offset, end, lineNr);

      char ch = input[offset];

      if ((ch == '/') || (ch == '>')) {
        break;
      }