/// <summary>
/// Get the argument value or default value.
/// </summary>
/// <typeparam name="TArgument">Type of the argument.</typeparam>
/// <param name="argument">Argument wrapper.</param>
/// <param name="defaultValue">Default value to return if argument is default.</param>
/// <returns>Argument value.</returns>
public static TArgument GetOrDefault <TArgument>(
this ArgumentWrapper <TArgument> argument,
TArgument defaultValue = default)
{
if (argument == null || EqualityComparer <TArgument> .Default.Equals(argument.Value, default))
{
return(defaultValue);
}
return(argument);
}
/// <summary>
/// Check argument is not default.
/// </summary>
/// <typeparam name="TArgument">Type of the argument.</typeparam>
/// <param name="argument">Argument wrapper.</param>
/// <param name="message">Message.</param>
/// <returns>Argument wrapper.</returns>
public static ArgumentWrapper <TArgument> IsNotDefault <TArgument>(
this ArgumentWrapper <TArgument> argument,
string message = null)
{
if (EqualityComparer <TArgument> .Default.Equals(argument.Value, default))
{
throw new ArgumentException(
paramName: argument.Name,
message: message ?? $"Argument value shall not be default.");
}
return(argument);
}
/// <summary>
/// Check argument is not only white space.
/// </summary>
/// <param name="argument">Argument wrapper.</param>
/// <param name="defaultValue">Default value to return if argument is default.</param>
/// <returns>Argument value.</returns>
public static ArgumentWrapper <string> IsNotWhiteSpace(
this ArgumentWrapper <string> argument,
string message = null)
{
if (argument.Value.Trim().Length == 0)
{
throw new ArgumentException(
paramName: argument.Name,
message: message ?? $"Argument value shall not only consists of white-space characters.");
}
return(argument);
}
/// <summary>
/// Check string is not empty.
/// </summary>
/// <param name="argument">Argument wrapper.</param>
/// <param name="message">Message.</param>
/// <returns>Argument wrapper.</returns>
public static ArgumentWrapper <string> IsNotEmpty(
this ArgumentWrapper <string> argument,
string message = null)
{
if (argument.Value.Length == 0)
{
throw new ArgumentException(
paramName: argument.Name,
message: message ?? $"Argument value shall not be an empty string.");
}
return(argument);
}
/// <summary>
/// Check the argument enumerable is not empty.
/// </summary>
/// <param name="argument">Argument wrapper.</param>
/// <param name="message">Optional message.</param>
/// <returns>Argument wrapper.</returns>
public static ArgumentWrapper <IEnumerable <TArgument> > IsNotEmpty <TArgument>(
this ArgumentWrapper <IEnumerable <TArgument> > argument,
string message = null)
{
if (argument.Value.Skip(1).Any())
{
throw new ArgumentException(
paramName: argument.Name,
message: message ?? $"Enumerable shall not be empty.");
}
return(argument);
}
/// <summary>
/// Check the argument enumerable has a certain number of elements.
/// </summary>
/// <param name="argument">Argument wrapper.</param>
/// <param name="count">Number of elements the enumerable shall have.</param>
/// <param name="message">Optional message.</param>
/// <returns>Argument wrapper.</returns>
public static ArgumentWrapper <IEnumerable <TArgument> > HasCount <TArgument>(
this ArgumentWrapper <IEnumerable <TArgument> > argument,
int count,
string message = null)
{
if (argument.Value.Count() != count)
{
throw new ArgumentException(
paramName: argument.Name,
message: message ?? $"Enumerable shall have {count} elements.");
}
return(argument);
}
/// <summary>
/// Check argument is not null.
/// </summary>
/// <typeparam name="TArgument">Type of the argument.</typeparam>
/// <param name="argument">Argument wrapper.</param>
/// <param name="message">Message.</param>
/// <returns>Argument wrapper.</returns>
public static ArgumentWrapper <TArgument> IsNotNull <TArgument>(
this ArgumentWrapper <TArgument> argument,
string message = null)
{
if (argument == null)
{
throw new ArgumentNullException(nameof(argument));
}
if (argument.Value == null)
{
throw new ArgumentNullException(
paramName: argument.Name,
message: message ?? $"Argument value shall not be null.");
}
return(argument);
}
/// <summary>
/// Check if the given predicate returns true for the argument value.
/// </summary>
/// <typeparam name="TArgument">Type of the argument.</typeparam>
/// <param name="argument">Argument wrapper.</param>
/// <param name="predicate">Predicate.</param>
/// <param name="message">Message.</param>
/// <returns>Argument wrapper.</returns>
public static ArgumentWrapper <TArgument> Is <TArgument>(
this ArgumentWrapper <TArgument> argument,
Predicate <TArgument> predicate,
string message = null)
{
if (argument == null)
{
throw new ArgumentNullException(nameof(argument));
}
if (predicate == null)
{
throw new ArgumentNullException(nameof(predicate));
}
if (!predicate(argument.Value))
{
throw new ArgumentException(
paramName: argument.Name,
message: message ?? $"Predicate shall return true for the value {argument.Value}.");
}
return(argument);
}