private bool EvalAsAtom(CSVRow row)
{
switch (castAs)
{
default:
switch (aRelation)
{
case '=':
return(row.GetEntry(fieldName).Equals(fieldValue));
case '<':
return(row.GetEntry(fieldName).CompareTo(fieldValue) < 0);
case '>':
return(row.GetEntry(fieldName).CompareTo(fieldValue) > 0);
case '#':
return(row.GetEntry(fieldName).StartsWith(fieldValue));
default:
return(false);
}
case 'd':
DateTime d1, d2;
if (!DateTime.TryParse(GetFinalDateIfEmpty(row.GetEntry(fieldName)), out d1))
{
throw new Exception(string.Format(
"Unable to parse {0} as date!",
row.GetEntry(fieldName)));
}
if (!DateTime.TryParse(GetFinalDateIfEmpty(fieldValue), out d2))
{
throw new Exception(string.Format(
"Unable to parse {0} as date!",
fieldValue));
}
switch (aRelation)
{
case '=':
return(d1 == d2);
case '<':
return(d1 < d2);
case '>':
return(d1 > d2);
default:
return(false);
}
}
}
public void Act(CSVRow row, Dictionary <string, string> vars)
{
switch (type)
{
case ExpressionType.Print :
Console.WriteLine(row);
break;
case ExpressionType.Set:
if (fieldValue.Length > 0 &&
fieldValue[0] == '$' &&
vars.ContainsKey(fieldValue.Substring(1)))
{
row.SetEntry(fieldName, vars[fieldValue.Substring(1)]);
}
else
{
row.SetEntry(fieldName, fieldValue);
}
break;
case ExpressionType.Let:
if (!vars.ContainsKey(fieldName))
{
vars.Add(fieldName, "");
}
if (row.Contains(fieldValue))
{
vars[fieldName] = row.GetEntry(fieldValue);
}
else
{
vars[fieldName] = fieldValue;
}
break;
}
if (next != null)
{
next.Act(row, vars);
}
}