private static void Validate(CommandInfo?command)
{
if (command == null)
{
return;
}
// Get duplicate options for command.
var duplicateOptions = GetDuplicates(command);
if (duplicateOptions.Length > 0)
{
throw ConfigurationException.DuplicateOption(command, duplicateOptions);
}
// No children?
if (command.IsBranch && command.Children.Count == 0)
{
throw ConfigurationException.BranchHasNoChildren(command);
}
// Multiple vector arguments?
var arguments = command.Parameters.OfType <CommandArgument>();
if (arguments.Any(x => x.ParameterKind == ParameterKind.Vector))
{
// Multiple vector arguments for command?
if (arguments.Count(x => x.ParameterKind == ParameterKind.Vector) > 1)
{
throw ConfigurationException.TooManyVectorArguments(command);
}
// Make sure that vector arguments are specified last.
if (arguments.Last().ParameterKind != ParameterKind.Vector)
{
throw ConfigurationException.VectorArgumentNotSpecifiedLast(command);
}
}
// Arguments
var argumnets = command.Parameters.OfType <CommandArgument>();
foreach (var argument in arguments)
{
if (argument.Required && argument.DefaultValue != null)
{
throw ConfigurationException.RequiredArgumentsCannotHaveDefaultValue(argument);
}
}
// Options
var options = command.Parameters.OfType <CommandOption>();
foreach (var option in options)
{
// Pair deconstructable?
if (option.Property.PropertyType.IsPairDeconstructable())
{
if (option.PairDeconstructor != null && option.Converter != null)
{
throw ConfigurationException.OptionBothHasPairDeconstructorAndTypeParameter(option);
}
}
else if (option.PairDeconstructor != null)
{
throw ConfigurationException.OptionTypeDoesNotSupportDeconstruction(option);
}
// Optional options that are not flags?
if (option.ParameterKind == ParameterKind.FlagWithValue && !option.IsFlagValue())
{
throw ConfigurationException.OptionalOptionValueMustBeFlagWithValue(option);
}
}
// Validate child commands.
foreach (var childCommand in command.Children)
{
Validate(childCommand);
}
}