static String extractEssentialWords()

in old/dekaf-core/src/main/java/org/jetbrains/dekaf/sql/SqlScriptBuilder.java [67:110]

• 44 lines of code
• 16 McCabe index (conditional complexity)

  static String extractEssentialWords(@NotNull final TextWalker walker, int limitWords) {
    TextWalker w = walker.clone();
    StringBuilder b = new StringBuilder(40);
    int wordsCnt = 0;
    boolean inWord = false;
    boolean inSingleLineComment = false;
    boolean inMultiLineComment = false;
    while (!w.isEOT()) {
      char c = w.getChar();
      char c2 = w.getNextChar();
      final boolean isWordChar = Character.isJavaIdentifierPart(c);
      if (inSingleLineComment) {
        if (c == '\n') inSingleLineComment = false;
      }
      else if (inMultiLineComment) {
        if (c == '*' && c2 == '/') {
          w.next(); // additional w.next() - because 2 chars
          inMultiLineComment = false;
        }
      }
      else if (inWord && !isWordChar) {
        wordsCnt++;
        if (wordsCnt >= limitWords) break;
        b.append(' ');
        inWord = false;
      }
      else if (isWordChar) {
        b.append(Character.toLowerCase(c));
        inWord = true;
      }
      else if (!isWordChar) {
        if (c == '-' && c2 == '-') {
          inSingleLineComment = true;
          w.next();
        }
        if (c == '/' && c2 == '*') {
          inMultiLineComment = true;
          w.next();
        }
      }
      w.next();
    }
    return b.toString().trim();
  }