/// <summary>
/// Gets an attribute of a given type and then casts and returns a specified value
/// </summary>
/// <typeparam name="X">The type of the attribute</typeparam>
/// <typeparam name="Y">The type of the value to return</typeparam>
/// <param name="o">The object to check</param>
/// <param name="PropertyName">The property name to look for</param>
/// <param name="Default">Default to return if property or attribute does not exist</param>
/// <returns>Either the casted property, or default</returns>
public static Y AttributeRef <X, Y>(this IHasAttributes o, string PropertyName, Y Default) where Y : class
{
if (!o.HasAttribute <X>() || !o.Attribute <X>().HasProperty(PropertyName))
{
return(Default);
}
return(o.Attribute <X>().GetProperty(PropertyName).GetValue <Y>() ?? Default);
}
/// <summary>
/// Gets an attribute of a given type and returns a nullable? of its value
/// </summary>
/// <typeparam name="X">The type of the attribute</typeparam>
/// <typeparam name="Y">The type of the value to return</typeparam>
/// <param name="o">The object to check</param>
/// <param name="PropertyName">The property name to look for</param>
/// <returns>A nullable struct representation of its value</returns>
public static Y?AttributeNullable <X, Y>(this IHasAttributes o, string PropertyName) where Y : struct
{
if (!o.HasAttribute <X>() || !o.Attribute <X>().HasProperty(PropertyName))
{
return(null);
}
return(o.Attribute <X>().GetProperty(PropertyName).GetValue <Y>());
}
/// <summary>
/// Retrieves a property value of an attribute of a given type (non-reference)
/// </summary>
/// <typeparam name="Y">The type of the property to return</typeparam>
/// <param name="o">The object to check</param>
/// <param name="t">The type of the attribute to search for</param>
/// <param name="PropertyName">The name of the property to retrieve the value for</param>
/// <param name="Default">If the property is not found, this is the default to return in place of null</param>
/// <returns>Either the casted property, or default</returns>
public static Y AttributeStruct <Y>(this IHasAttributes o, Type t, string PropertyName, Y Default) where Y : struct
{
if (!o.HasAttribute(t) || !o.Attribute(t).HasProperty(PropertyName))
{
return(Default);
}
return(o.Attribute(t).GetProperty(PropertyName).GetValue <Y>());
}
/// <summary>
/// Gets an attribute of a given type and then casts and returns a specified value
/// </summary>
/// <typeparam name="X">The type of the attribute to retrieve</typeparam>
/// <typeparam name="Y">The type of the value to return</typeparam>
/// <param name="o">The source of the attribute</param>
/// <param name="PropertyName">The name of the property on the attribute to retrieve</param>
/// <returns>The casted property value found on the attribute</returns>
public static Y GetAttributeValue <X, Y>(this IHasAttributes o, string PropertyName)
{
return(o.Attribute <X>()[PropertyName].GetValue <Y>());
}
