Ejemplo n.º 1
0
  /**
   * Convert a list of values to an Oak markup String, e.g. "[ true, null, false ]".
   *
   * @param values The list of values
   * @return An Oak markup representation of the values.
   * @see #parse(String)
   */
  public String toString(List<Object> values) {
    assert values != null : "Arrays can't be null, only empty";

    final Text t = new Text(true);

    t.append('[');
    if (values.size() > 0) {
      t.space();
      for (final Object value : values) {
        t.delimit();
        toMarkup(value, t);
      }
      t.space();
    }
    t.append(']');

    return t.toString();
  }
Ejemplo n.º 2
0
  /**
   * Convert a potentially escaped string to text.
   *
   * @param t The source string.
   * @param start Starting offset.
   * @param end Ending offset.
   * @return Return the un-escaped string which may be zero-length but not null.
   */
  private static String unescape(Text t, int start, int end) {
    final Text result = new Text();

    /*
     * We know that there's a starting and ending quote that's been removed
     * from the string but otherwise we can't trust the contents.
     */
    for (int i = start; i < end; i++) {
      final char c = t.charAt(i);
      final char escaped;
      if (c == '\\') {
        if (i < end - 1) {
          i++;
          final char next = t.charAt(i);
          if (next == 't') {
            escaped = '\t';
          } else if (next == 'n') {
            escaped = '\n';
          } else if (next == '"') {
            escaped = '"';
          } else if (next == '\\') {
            escaped = '\\';
          } else {
            error("Invalid escape: '\\" + next + '\'');
            escaped = next;
          }
        } else {
          error("Unterminated string");
          escaped = c;
        }
      } else {
        escaped = c;
      }
      result.append(escaped);
    }

    return result.toString();
  }
Ejemplo n.º 3
0
  /**
   * In Oak it is possible to embed a tab character as an ASCII 8 or as a \t but internally we store
   * this in ASCII. The same goes for newlines and other tables (see the Oak reference). Here we
   * convert external format to internal format.
   *
   * @param source The text to process, may be null. E.g. "Hello\tworld" (with the quotes)
   * @return Return an internal format string.
   */
  @Nullable
  public static String textToInternalFormat(@Nullable String source) throws ParsingException {
    final String result;

    assert source == null
        || source.length() >= 2
            && source.charAt(0) == '"'
            && source.charAt(source.length() - 1) == '"';

    if (source == null) {
      result = null;
    } else {
      final Text t = new Text();
      final char[] ca = source.toCharArray();
      final int length = ca.length - 1; // 1 because remove quotes

      for (int i = 1; i < length; i++) { // 1 because remove quotes
        final char c = ca[i];
        if (c == '\\') {
          if (i == length - 1) {
            error("Invalid text " + source + ", escape at end of line");
          } else {
            i++;
            final char next = ca[i];
            if (next == 't') {
              t.append('\t');
            } else if (next == 'n') {
              t.append('\n');
            } else if (next == '"') {
              t.append('"');
            } else if (next == '\\') {
              t.append('\\');
            } else if (next == 'u') {
              // Unicode, 1-4 hex characters...
              i++;

              final Text hex = new Text();
              hex.append(source);
              hex.setCursor(i);
              final int start = i;
              if (hex.consumeAscii(Text.ASCII_0_F)) {
                final int end = start + Math.min(4, hex.cursor() - start);
                final String string = hex.getString(start, end);
                final char u = (char) Integer.parseInt(string, 16);
                t.append(u);
                i = end - 1;
              } else {
                error("Invalid text " + source + ", incorrect unicode");
              }
            } else {
              error("Invalid text: \\" + next);
            }
          }
        } else {
          t.append(c);
        }
      }
      result = t.toString();
    }

    return result;
  }
Ejemplo n.º 4
0
 /**
  * Convert a value to an Oak markup representation.
  *
  * @param value The value to represent.
  * @return E.g. `/Some/Path`
  * @see #parse(String)
  */
 public final String toString(Object value) {
   final Text t = new Text();
   toMarkup(value, t);
   return t.toString();
 }