internal CompareExchangeValue <T> Create <T>(T item)
{
AssertState();
if (_value != null)
{
throw new InvalidOperationException($"The compare exchange value with key '{_key}' is already tracked.");
}
_index = 0;
var value = new CompareExchangeValue <T>(_key, _index, item);
_value = value;
_state = CompareExchangeValueState.Created;
return(value);
}
internal CompareExchangeValue <T> GetValue <T>(DocumentConventions conventions)
{
switch (_state)
{
case CompareExchangeValueState.None:
case CompareExchangeValueState.Created:
{
if (_value is CompareExchangeValue <T> v)
{
return(v);
}
if (_value != null)
{
throw new InvalidOperationException("Value cannot be null.");
}
T entity = default;
if (_originalValue != null && _originalValue.Value != null)
{
var type = typeof(T);
if (type.IsPrimitive || type == typeof(string))
{
_originalValue.Value.TryGet(Constants.CompareExchange.ObjectFieldName, out entity);
}
else
{
entity = conventions.Serialization.DefaultConverter.FromBlittable <T>(_originalValue.Value, _key);
}
}
var value = new CompareExchangeValue <T>(_key, _index, entity);
_value = value;
return(value);
}
case CompareExchangeValueState.Missing:
case CompareExchangeValueState.Deleted:
return(null);
default:
throw new NotSupportedException($"Not supported state: '{_state}'");
}
}
