/// <summary>
/// Constructs a mapping between argument keys & other related data
/// </summary>
/// <typeparam name="T">Custom argument class</typeparam>
/// <returns>Mapping between arguments & corresponding data</returns>
internal static IDictionary <string, ArgumentData> GetArgumentData <T>()
{
ArgumentData helpData = new ArgumentData
{
Details = "Prints this help text",
Key = "h",
LongKey = "help",
Optional = true,
Type = ArgumentType.Flag,
};
IDictionary <string, ArgumentData> mapping = new Dictionary <string, ArgumentData>(StringComparer.OrdinalIgnoreCase)
{
{ "h", helpData },
{ "help", helpData },
};
foreach (PropertyInfo propertyInfo in typeof(T).GetProperties())
{
ParamAttribute paramAttr = propertyInfo.GetCustomAttribute <ParamAttribute>();
if (paramAttr == null)
{
continue;
}
ArgumentData data = ArgumentData.Parse(propertyInfo);
mapping.SafeAdd(paramAttr.Key, data);
mapping.SafeAdd(paramAttr.LongKey, data);
}
return(mapping);
}
internal static ArgumentData Parse(PropertyInfo propertyInfo)
{
DetailsAttribute detailsAttr = propertyInfo.GetCustomAttribute <DetailsAttribute>();
OptionalAttribute optionalAttr = propertyInfo.GetCustomAttribute <OptionalAttribute>();
ParamAttribute paramAttr = propertyInfo.GetCustomAttribute <ParamAttribute>();
if (paramAttr == null)
{
return(null);
}
if (!IsTypeSupported(propertyInfo.PropertyType, paramAttr.Type))
{
throw new InvalidOperationException(
string.Format("Incompatible type specified for '{0}'", propertyInfo.Name));
}
if (string.IsNullOrWhiteSpace(paramAttr.Key) && string.IsNullOrWhiteSpace(paramAttr.LongKey))
{
throw new InvalidOperationException(
string.Format("Both Key & LongKey cannot be null for property '{0}'.", propertyInfo.Name));
}
string details = detailsAttr != null ? detailsAttr.Details : null;
string defaultValue = optionalAttr != null ? optionalAttr.DefaultValue : null;
ArgumentData data = new ArgumentData
{
DefaultValue = defaultValue,
Details = details,
Key = paramAttr.Key,
LongKey = paramAttr.LongKey,
Optional = optionalAttr != null,
Property = propertyInfo,
Type = paramAttr.Type,
};
return(data);
}
