/// <summary>
/// Tries to apply a default value to its related property.
/// </summary>
/// <remarks>
/// This method tries to apply a default value to its related property. For
/// the moment, only optional parameters support a usage of default values.
/// </remarks>
/// <param name="setting">
/// An instance of class <see cref="ArgumentProcessorSetting"/> to get the
/// default value from to be applied.
/// </param>
/// <returns>
/// The same instance of class <see cref="ArgumentProcessorSetting"/> that
/// has been provided as parameter.
/// </returns>
/// <exception cref="DefaultValueException">
/// This exception is thrown in all cases of applying a default value fails.
/// </exception>
private ArgumentProcessorSetting ApplyDefaultValue(ArgumentProcessorSetting setting)
{
if (!(setting.Attribute is OptionParameterAttribute attribute))
{
return(setting);
}
if (!attribute.HasDefaultValue)
{
return(setting);
}
try
{
setting.Property.SetValue(this.Instance, OptionTypeConverter.Convert(attribute.DefaultValue?.ToString(), setting.Property.PropertyType));
}
catch (Exception exception)
{
throw new DefaultValueException(
$"Could not apply default value of \"{(attribute.DefaultValue is null ? "null" : attribute.DefaultValue.ToString())}\" " +
$"to property \"{setting.Property.Name}\". See inner exception for more information.", exception);
}
return(setting);
}
public void Convert_UnsupportedType_ThrowsException(String actual, Type type)
{
Assert.Throws <NotSupportedException>(() => { OptionTypeConverter.Convert(actual, type); });
}
/// <summary>
/// Performs command line argument processing.
/// </summary>
/// <remarks>
/// This method performs the command line argument processing.
/// </remarks>
public void Process()
{
try
{
this.Initialize();
List <String> parameters = new List <String>(this.Arguments);
List <ArgumentProcessorSetting> processed = new List <ArgumentProcessorSetting>();
while (parameters.Count > 0)
{
String parameter = parameters[0];
parameters.RemoveAt(0);
ArgumentProcessorSetting setting;
if (!parameter.IsParameter())
{
if (this.TryFindSetting(out setting))
{
List <String> items = new List <String> {
(String)OptionTypeConverter.Convert(parameter, typeof(String))
};
while (true)
{
if (parameters.Count > 0)
{
parameter = parameters[0];
if (!parameter.IsParameter())
{
parameters.RemoveAt(0);
items.Add((String)OptionTypeConverter.Convert(parameter, typeof(String)));
}
else
{
break;
}
}
else
{
break;
}
}
if (setting.Property.PropertyType == typeof(List <String>))
{
setting.Property.SetValue(this.Instance, items);
processed.Add(setting);
}
else if (setting.Property.PropertyType == typeof(String[]))
{
setting.Property.SetValue(this.Instance, items.ToArray());
processed.Add(setting);
}
else
{
throw new VerbalViolationException(
"A verbal parameter can only be a string list or a string array.");
}
continue;
}
else
{
throw new VerbalViolationException(
"A property of type verbal parameter couldn't be determined.");
}
}
else
{
if (this.TryFindSetting(parameter, out setting))
{
if (setting.IsSwitchParameter())
{
setting.Property.SetValue(this.Instance, true);
processed.Add(setting);
}
else if (setting.IsOptionParameter())
{
String argument = String.Empty;
Int32 offset = parameter.IndexOf((setting.Attribute as OptionParameterAttribute).Separator);
if (offset != -1)
{
argument = parameter.Substring(offset + 1);
parameter = parameter.Substring(0, offset);
}
else if (parameters.Count > 0)
{
argument = parameters[0];
parameters.RemoveAt(0);
}
if (String.IsNullOrWhiteSpace(argument) || argument.IsParameter())
{
throw new OptionViolationException(
$"The argument of parameter \"{parameter}\" is missing.");
}
if (setting.HasCustomConverter)
{
setting.Property.SetValue(this.Instance, setting.InvokeCustomConverter(parameter, argument, (setting.Attribute as OptionParameterAttribute).Delimiter));
}
// TODO: Remove obsolete code later on.
/* obsolete start */
else if (setting.Property.PropertyType.HasConverter())
{
setting.Property.SetValue(this.Instance, setting.Property.PropertyType
.InvokeConverter(parameter, argument, (setting.Attribute as OptionParameterAttribute).Delimiter));
}
/* obsolete end */
else
{
setting.Property.SetValue(this.Instance, OptionTypeConverter.Convert(argument, setting.Property.PropertyType));
}
processed.Add(setting);
}
}
else
{
throw new SupportViolationException(
$"The parameter \"{parameter}\" is not supported.");
}
}
}
this.ValidateExclusiveProperties(processed);
this.ValidateRequiredProperties(processed);
this.ValidateDependencyProperties(processed);
}
catch (Exception exception)
{
exception.ThrowArgumentParserException();
}
}
public void Convert_SupportedType_ResultIsEqual(String actual, Type type, Object expected)
{
Assert.AreEqual(OptionTypeConverter.Convert(actual, type), expected);
}