public ISearchParameter CreateParameter(string value)
{
if (ValuePattern != null && !ValuePattern.IsMatch(value))
{
return(new WrongSearchParameter(Identifier, value, string.Format("value does not match regular expression '{0}'", ValuePattern.ToString())));
}
T tvalue;
try
{
tvalue = (T)Convert.ChangeType(value, Type.GetTypeCode(typeof(T)));
}
catch (FormatException) {
return(new WrongSearchParameter(Identifier, value, string.Format("value cannot be parsed as '{0}'", Type.GetTypeCode(typeof(T)))));
}
if (ValueRange != null && !ValueRange.ContainsValue(tvalue))
{
return(new WrongSearchParameter(Identifier, value, string.Format("value in not within range '{0}'", ValueRange)));
}
return(new TypedParameter <T>(Identifier, tvalue));
}