internal static String Execute(String formula, Project project)
{
Match separatedFunction = Regex.Match(formula, SQLFunctionPattern);
String functionName = separatedFunction.Groups[1].Value;
String functionArguments = separatedFunction.Groups[2].Value;
GroupCollection arguements;
IComparable arg1;
IComparable arg2;
switch (functionName)
{
case "if":
case "IF":
arguements = Regex.Match(functionArguments, IfArguementsPattern).Groups;
String condition = arguements[1].Value;
if (IsSatisfying(project, condition))
{
return arguements[2].Value;
}
return arguements[3].Value;
case "min":
case "MIN":
arguements = Regex.Match(functionArguments, TwoArguementsPattern).Groups;
try
{
arg1 = (IComparable)project.GetTypedValue(arguements[1].Value);
arg2 = (IComparable)project.GetTypedValue(arguements[2].Value);
}
catch (InvalidCastException)
{
return "";
}
if (arg1.CompareTo(arg2) < 0)
{
return arg1.ToString();
}
else
{
return arg2.ToString();
}
case "max":
case "MAX":
arguements = Regex.Match(functionArguments, TwoArguementsPattern).Groups;
try
{
arg1 = (IComparable)project.GetTypedValue(arguements[1].Value);
arg2 = (IComparable)project.GetTypedValue(arguements[2].Value);
}
catch (InvalidCastException)
{
return "";
}
if (arg1.CompareTo(arg2) > 0)
{
return arg1.ToString();
}
else
{
return arg2.ToString();
}
default:
return "";
}
}
private static bool ResolveFor(Project project, String arg1, String sign, String arg2)
{
IComparable var1;
IComparable var2;
int comparisonResult;
try
{
var1 = (IComparable)project.GetTypedValue(arg1);
var2 = (IComparable)project.GetTypedValue(arg2);
comparisonResult = var1.CompareTo(var2);
}
catch (InvalidCastException)
{
return true;
}
catch (ArgumentException)
{
return true;
}
catch (NullReferenceException)
{
return false;
}
if (sign.Contains('=') && !sign.Contains('!'))
{
if (sign == "<=")
{
if (comparisonResult < 0)
{
return true;
}
}
else if (sign == ">=")
{
if (comparisonResult > 0)
{
return true;
}
}
if (comparisonResult == 0)
{
return true;
}
return false;
}
else
{
if (sign == "<" && comparisonResult < 0)
{
return true;
}
if (sign == ">" && comparisonResult > 0)
{
return true;
}
if (sign == "==" && comparisonResult == 0)
{
return true;
}
return false;
}
}