microburlapinput.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 1,032 行 · 第 1/2 页

    int ch = skipWhitespace();

    peek = ch;
    
    if (ch == '<') {
      expectEndTag("length");
      return -1;
    }

    int value = parseInt();
      
    expectEndTag("length");
    
    return value;
  }

  /**
   * Resolves a remote object.
   */
  public Object resolveRemote(String type, String url)
    throws IOException
  {
    return new BurlapRemote(type, url);
  }

  /**
   * Reads a fault.
   */
  public Hashtable readFault()
    throws IOException
  {
    expectStartTag("fault");
    
    Hashtable map = new Hashtable();

    while (parseTag()) {
      peekTag = true;
      Object key = readObject(null);
      Object value = readObject(null);

      if (key != null && value != null)
        map.put(key, value);
    }
    
    if (! sbuf.toString().equals("fault"))
      throw new BurlapProtocolException("expected </fault>");

    return map;
  }
  
  /**
   * Reads an object from the input stream.
   *
   * @param expectedClass the calling routine's expected class
   * @param type the type from the stream
   */
  public Object readMap(Class expectedClass, String type)
    throws IOException
  {
    Hashtable map = new Hashtable();
    if (refs == null)
      refs = new Vector();
    refs.addElement(map);

    while (parseTag()) {
      peekTag = true;
      Object key = readObject(null);
      Object value = readObject(null);

      map.put(key, value);
    }
    if (! sbuf.toString().equals("map"))
      throw new BurlapProtocolException("expected </map>");

    return map;
  }

  /**
   * Reads object unknown to MicroBurlapInput.
   */
  protected Object readExtensionObject(Class expectedClass, String tag)
    throws IOException
  {
    throw new BurlapProtocolException("unknown object tag <" + tag + ">");
  }
  
  /**
   * Reads a list object from the input stream.
   *
   * @param expectedClass the calling routine's expected class
   * @param type the type from the stream
   * @param length the expected length, -1 for unspecified length
   */
  public Object readList(Class expectedClass, String type, int length)
    throws IOException
  {
    Vector list = new Vector();
    if (refs == null)
      refs = new Vector();
    refs.addElement(list);

    while (parseTag()) {
      peekTag = true;
      Object value = readObject(null);

      list.addElement(value);
    }
    
    if (! sbuf.toString().equals("list"))
      throw new BurlapProtocolException("expected </list>");

    return list;
  }

  /**
   * Parses an integer value from the stream.
   */
  protected int parseInt()
    throws IOException
  {
    int sign = 1;
    int value = 0;

    int ch = skipWhitespace();
    if (ch == '+')
      ch = read();
    else if (ch == '-') {
      sign = -1;
      ch = read();
    }

    for (; ch >= '0' && ch <= '9'; ch = read())
      value = 10 * value + ch - '0';
    
    peek = ch;

    return sign * value;
  }

  /**
   * Parses a long value from the stream.
   */
  protected long parseLong()
    throws IOException
  {
    long sign = 1;
    long value = 0;

    int ch = skipWhitespace();
    if (ch == '+')
      ch = read();
    else if (ch == '-') {
      sign = -1;
      ch = read();
    }

    for (; ch >= '0' && ch <= '9'; ch = read()) {
      value = 10 * value + ch - '0';
    }

    peek = ch;

    return sign * value;
  }

  /**
   * Parses a date value from the stream.
   */
  protected long parseDate(Calendar calendar)
    throws IOException
  {
    int ch = skipWhitespace();
    
    int year = 0;
    for (int i = 0; i < 4; i++) {
      if (ch >= '0' && ch <= '9')
        year = 10 * year + ch - '0';
      else
        throw expectedChar("year", ch);

      ch = read();
    }

    int month = 0;
    for (int i = 0; i < 2; i++) {
      if (ch >= '0' && ch <= '9')
        month = 10 * month + ch - '0';
      else
        throw expectedChar("month", ch);

      ch = read();
    }

    int day = 0;
    for (int i = 0; i < 2; i++) {
      if (ch >= '0' && ch <= '9')
        day = 10 * day + ch - '0';
      else
        throw expectedChar("day", ch);

      ch = read();
    }

    if (ch != 'T')
      throw expectedChar("`T'", ch);

    ch = read();

    int hour = 0;
    for (int i = 0; i < 2; i++) {
      if (ch >= '0' && ch <= '9')
        hour = 10 * hour + ch - '0';
      else
        throw expectedChar("hour", ch);

      ch = read();
    }

    int minute = 0;
    for (int i = 0; i < 2; i++) {
      if (ch >= '0' && ch <= '9')
        minute = 10 * minute + ch - '0';
      else
        throw expectedChar("minute", ch);

      ch = read();
    }

    int second = 0;
    for (int i = 0; i < 2; i++) {
      if (ch >= '0' && ch <= '9')
        second = 10 * second + ch - '0';
      else
        throw expectedChar("second", ch);

      ch = read();
    }

    for (; ch > 0 && ch != '<'; ch = read()) {
    }

    peek = ch;

    calendar.set(Calendar.YEAR, year);
    calendar.set(Calendar.MONTH, month - 1);
    calendar.set(Calendar.DAY_OF_MONTH, day);
    calendar.set(Calendar.HOUR_OF_DAY, hour);
    calendar.set(Calendar.MINUTE, minute);
    calendar.set(Calendar.SECOND, second);
    calendar.set(Calendar.MILLISECOND, 0);

    return calendar.getTime().getTime();
  }

  /**
   * Parses a string value from the stream.
   * string buffer is used for the result.
   */
  protected String parseString()
    throws IOException
  {
    StringBuffer sbuf = new StringBuffer();

    return parseString(sbuf).toString();
  }
  
  /**
   * Parses a string value from the stream.  The burlap object's
   * string buffer is used for the result.
   */
  protected StringBuffer parseString(StringBuffer sbuf)
    throws IOException
  {
    int ch = read();

    for (; ch >= 0 && ch != '<'; ch = read()) {
      if (ch == '&') {
        ch = read();

        if (ch == '#') {
          ch = read();

          if (ch >= '0' && ch <= '9') {
            int v = 0;
            for (; ch >= '0' && ch <= '9'; ch = read()) {
              v = 10 * v + ch - '0';
            }

            sbuf.append((char) v);
          }
        }
        else {
          StringBuffer entityBuffer = new StringBuffer();

          for (; ch >= 'a' && ch <= 'z'; ch = read())
            entityBuffer.append((char) ch);

          String entity = entityBuffer.toString();
          if (entity.equals("amp"))
            sbuf.append('&');
          else if (entity.equals("apos"))
            sbuf.append('\'');
          else if (entity.equals("quot"))
            sbuf.append('"');
          else if (entity.equals("lt"))
            sbuf.append('<');
          else if (entity.equals("gt"))
            sbuf.append('>');
          else
            throw new BurlapProtocolException("unknown XML entity &" + entity + "; at `" + (char) ch + "'");
        }

        if (ch != ';')
          throw expectedChar("';'", ch);
      }
      else if (ch < 0x80)
        sbuf.append((char) ch);
      else if ((ch & 0xe0) == 0xc0) {
        int ch1 = read();
        int v = ((ch & 0x1f) << 6) + (ch1 & 0x3f);

        sbuf.append((char) v);
      }
      else if ((ch & 0xf0) == 0xe0) {
        int ch1 = read();
        int ch2 = read();
        int v = ((ch & 0x0f) << 12) + ((ch1 & 0x3f) << 6) + (ch2 & 0x3f);

        sbuf.append((char) v);
      }
      else
        throw new BurlapProtocolException("bad utf-8 encoding");
    }

    peek = ch;

    return sbuf;
  }
  
  /**
   * Parses a byte array.
   */
  protected byte []parseBytes()
    throws IOException
  {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();

    parseBytes(bos);

    return bos.toByteArray();
  }
  
  /**
   * Parses a byte array.
   */
  protected ByteArrayOutputStream parseBytes(ByteArrayOutputStream bos)
    throws IOException
  {
    int ch;
    for (ch = read(); ch >= 0 && ch != '<'; ch = read()) {
      int b1 = ch;
      int b2 = read();
      int b3 = read();
      int b4 = read();

      if (b4 != '=') {
        int chunk = ((base64Decode[b1] << 18) +
                     (base64Decode[b2] << 12) +
                     (base64Decode[b3] << 6) +
                     (base64Decode[b4]));

        bos.write(chunk >> 16);
        bos.write(chunk >> 8);
        bos.write(chunk);
      }
      else if (b3 != '=') {
        int chunk = ((base64Decode[b1] << 12) +
                     (base64Decode[b2] << 6) +
                     (base64Decode[b3]));

        bos.write(chunk >> 8);
        bos.write(chunk);
      }
      else {
        int chunk = ((base64Decode[b1] << 6) +
                     (base64Decode[b2]));

        bos.write(chunk);
      }
    }

    if (ch == '<')
      peek = ch;
    
    return bos;
  }

  protected void expectStartTag(String tag)
    throws IOException
  {
    if (! parseTag())
      throw new BurlapProtocolException("expected <" + tag + ">");

    if (! sbuf.toString().equals(tag))
      throw new BurlapProtocolException("expected <" + tag + "> at <" + sbuf + ">");
  }

  protected void expectEndTag(String tag)
    throws IOException
  {
    if (parseTag())
      throw new BurlapProtocolException("expected </" + tag + ">");

    if (! sbuf.toString().equals(tag))
      throw new BurlapProtocolException("expected </" + tag + "> at </" + sbuf + ">");
  }

  /**
   * Parses a tag.  Returns true if it's a start tag.
   */
  protected boolean parseTag()
    throws IOException
  {
    if (peekTag) {
      peekTag = false;
      return true;
    }
    
    int ch = skipWhitespace();
    boolean isStartTag = true;

    if (ch != '<')
      throw expectedChar("'<'", ch);

    ch = read();
    if (ch == '/') {
      isStartTag = false;
      ch = is.read();
    }
    
    if (! isTagChar(ch))
      throw expectedChar("tag", ch);
      
    sbuf.setLength(0);
    for (; isTagChar(ch); ch = read())
      sbuf.append((char) ch);

    if (ch != '>')
      throw expectedChar("'>'", ch);

    return isStartTag;
  }

  protected IOException expectedChar(String expect, int actualChar)
  {
    return new BurlapProtocolException("expected " + expect + " at " +
                           (char) actualChar + "'");
  }

  protected IOException expectBeginTag(String expect, String tag)
  {
    return new BurlapProtocolException("expected <" + expect + "> at <" + tag + ">");
  }

  private boolean isTagChar(int ch)
  {
    return (ch >= 'a' && ch <= 'z' ||
            ch >= 'A' && ch <= 'Z' ||
            ch >= '0' && ch <= '9' ||
            ch == ':' || ch == '-');
  }

  protected int skipWhitespace()
    throws IOException
  {
    int ch = read();

    for (;
         ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r';
         ch = read()) {
    }

    return ch;
  }

  protected boolean isWhitespace(int ch)
    throws IOException
  {
    return ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r';
  }

  protected int read()
    throws IOException
  {
    if (peek > 0) {
      int value = peek;
      peek = 0;
      return value;
    }
    
    return is.read();
  }

  static {
    base64Decode = new int[256];
    for (int i = 'A'; i <= 'Z'; i++)
      base64Decode[i] = i - 'A';
    for (int i = 'a'; i <= 'z'; i++)
      base64Decode[i] = i - 'a' + 26;
    for (int i = '0'; i <= '9'; i++)
      base64Decode[i] = i - '0' + 52;
    base64Decode['+'] = 62;
    base64Decode['/'] = 63;
  }
}