public virtual void Visiting(SqlMathExpression mathExpression)
{
mathExpression.LeftOperand.Accept(this) ;
switch(mathExpression.SqlMathOperator)
{
case SqlMathOperatorType.Add:
{
sqlBuilder.Append("+");
break;
}
case SqlMathOperatorType.Divide:
{
sqlBuilder.Append("/");
break;
}
case SqlMathOperatorType.Multiply:
{
sqlBuilder.Append("*");
break;
}
case SqlMathOperatorType.Subtract:
{
sqlBuilder.Append("-");
break;
}
}
mathExpression.RightOperand.Accept(this) ;
}
public virtual void Visited(SqlMathExpression mathExpression)
{
}
private SqlExpression EvalMath(NPathMathExpression mathExpression)
{
SqlExpression leftExpression = EvalExpression(mathExpression.LeftOperand);
SqlExpression rightExpression = EvalExpression(mathExpression.RightOperand);
SqlMathOperatorType mathOperator ;
switch(mathExpression.Operator)
{
case "add":
mathOperator = SqlMathOperatorType.Add;
break;
case "minus":
mathOperator = SqlMathOperatorType.Subtract;
break;
case "div":
mathOperator = SqlMathOperatorType.Divide;
break;
case "mul":
mathOperator = SqlMathOperatorType.Multiply;
break;
default:
throw new IAmOpenSourcePleaseImplementMeException("Operator not implemented");
}
SqlMathExpression predicate = new SqlMathExpression(leftExpression,mathOperator,rightExpression);
return predicate;
}
