/// <summary>
/// Returns the expected configuration key with full path, for the given option.
/// </summary>
public static string GetKey <TOptions, TProperty>(Expression <Func <TOptions, TProperty> > propertySelector)
{
string path = OptionsAttribute.GetConfigurationPath <TOptions>();
string propertyKey = ((MemberExpression)propertySelector.Body).Member.Name;
if (string.IsNullOrEmpty(path))
{
return(propertyKey);
}
else
{
return(path + ConfigurationPathSeparator + propertyKey);
}
}
public T GetOptions <T>(string configurationPath = "", bool requireAllMembers = false) where T : class
{
var optionsType = typeof(T);
var optionsInstance = Activator.CreateInstance(optionsType);
if (string.IsNullOrEmpty(configurationPath))
{
configurationPath = OptionsAttribute.GetConfigurationPath <T>();
}
var props = optionsType.GetProperties(BindingFlags.Public | BindingFlags.Instance).Where(prop => prop.CanWrite);
var fields = optionsType.GetFields(BindingFlags.Public | BindingFlags.Instance).Where(field => !field.IsInitOnly);
var members = props.Cast <MemberInfo>().Concat(fields.Cast <MemberInfo>()).ToList();
var membersBound = new List <MemberInfo>();
foreach (var member in members)
{
bool convertRelativePath = member.GetCustomAttribute <AbsolutePathOptionAttribute>() != null;
if (TryGetConfigurationValueForMemberName(member.Name, out var memberValue, configurationPath, convertRelativePath))
{
SetMemberValue(optionsInstance, member, memberValue);
if (requireAllMembers)
{
membersBound.Add(member);
}
}
}
if (requireAllMembers && membersBound.Count != members.Count)
{
var missing = members.Where(member => !membersBound.Contains(member)).Select(member => member.Name);
throw new FrameworkException($"Binding requires all members to be present in configuration, but some are missing: {string.Join(",", missing)}.");
}
return((T)optionsInstance);
}