private static int checkDescriptor()

in asm-util/src/main/java/org/objectweb/asm/util/CheckMethodAdapter.java [1365:1410]
46 lines of code
21 McCabe index (conditional complexity)

  private static int checkDescriptor(
      final int version, final String descriptor, final int startPos, final boolean canBeVoid) {
    if (descriptor == null || startPos >= descriptor.length()) {
      throw new IllegalArgumentException("Invalid type descriptor (must not be null or empty)");
    }
    switch (descriptor.charAt(startPos)) {
      case 'V':
        if (canBeVoid) {
          return startPos + 1;
        } else {
          throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor);
        }
      case 'Z':
      case 'C':
      case 'B':
      case 'S':
      case 'I':
      case 'F':
      case 'J':
      case 'D':
        return startPos + 1;
      case '[':
        int pos = startPos + 1;
        while (pos < descriptor.length() && descriptor.charAt(pos) == '[') {
          ++pos;
        }
        if (pos < descriptor.length()) {
          return checkDescriptor(version, descriptor, pos, false);
        } else {
          throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor);
        }
      case 'L':
        int endPos = descriptor.indexOf(';', startPos);
        if (startPos == -1 || endPos - startPos < 2) {
          throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor);
        }
        try {
          checkInternalClassName(version, descriptor.substring(startPos + 1, endPos), null);
        } catch (IllegalArgumentException e) {
          throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor, e);
        }
        return endPos + 1;
      default:
        throw new IllegalArgumentException(INVALID_DESCRIPTOR + descriptor);
    }
  }