/// <summary>
/// Main generation method which chooses the algorithm to use for the generation.
/// </summary>
private string GenerateString(int length)
{
if (length == 0)
{
throw new ArgumentException("You can't generate a string of a zero length");
}
if (!UseUpperCaseCharacters && !UseLowerCaseCharacters && !UseNumericCharacters && !UseSpecialCharacters)
{
throw new ArgumentException("There should be at least one character set in use");
}
if (!RepeatCharacters && (CurrentGeneralCharacters.Length < length))
{
throw new ArgumentException("There is not enough characters to create a string without repeats");
}
var result = ""; // This string will contain the result
if (PatternDriven)
{
// Using the pattern to generate a string
result = PatternDrivenAlgo(Pattern);
}
else if (MinUpperCaseCharacters == 0 && MinLowerCaseCharacters == 0 &&
MinNumericCharacters == 0 && MinSpecialCharacters == 0)
{
// Using the simpliest algorithm in this case
result = SimpleGenerateAlgo(length);
}
else
{
// Paying attention to limits
result = GenerateAlgoWithLimits(length);
}
// Support for unique strings
if (UniqueStrings && ExistingStrings.Contains(result))
{
return(GenerateString(length));
}
AddExistingString(result); // Saving history
return(result);
}
/// <summary>
/// Main generation method which chooses the algorithm to use for the generation.
/// It checks some exceptional situations as well.
/// </summary>
private string GenerateString(int length)
{
if (length == 0)
{
throw new ArgumentException("You can't generate a string of a zero length");
}
if (!UseUpperCaseCharacters && !UseLowerCaseCharacters && !UseNumericCharacters && !UseSpecialCharacters)
{
throw new ArgumentException("There should be at least one character set in use");
}
if (!RepeatCharacters && (CurrentGeneralCharacters.Length < length))
{
throw new ArgumentException("There is not enough characters to create a string without repeats");
}
var result = ""; // This string will contain the result
if (PatternDriven)
{
result = PatternDrivenAlgo(Pattern);
}
else if ((MinUpperCaseCharacters == 0) && (MinLowerCaseCharacters == 0) && (MinNumericCharacters == 0) &&
(MinSpecialCharacters == 0))
{
result = SimpleGenerateAlgo(length);
}
else
{
result = GenerateAlgoWithLimits(length);
}
// Support for unique strings
// Recursion, but possibility of the stack overflow is low for big strings (> 3 chars).
if (UniqueStrings && ExistingStrings.Contains(result))
{
return(GenerateString(length));
}
AddExistingString(result); // Saving history
return(result);
}