AstBuilder.java 文件源码

private static ArithmeticBinaryExpression.Type getArithmeticBinaryOperator(Token operator) {
  switch (operator.getType()) {
    case SqlBaseLexer.PLUS:
      return ArithmeticBinaryExpression.Type.ADD;
    case SqlBaseLexer.MINUS:
      return ArithmeticBinaryExpression.Type.SUBTRACT;
    case SqlBaseLexer.ASTERISK:
      return ArithmeticBinaryExpression.Type.MULTIPLY;
    case SqlBaseLexer.SLASH:
      return ArithmeticBinaryExpression.Type.DIVIDE;
    case SqlBaseLexer.PERCENT:
      return ArithmeticBinaryExpression.Type.MODULUS;
    default:
      throw new UnsupportedOperationException("Unsupported operator: " + operator.getText());
  }
}