private static object DocumentToObject(Type objectType, ItemStorage storage)
{
if (storage == null)
{
throw new ArgumentNullException();
}
if (storage.Document == null)
{
return(null);
}
object instance = EntityUtils.Instantiate(objectType);
PopulateInstance(storage, instance);
return(instance);
}
private static void PopulateItemStorage(object toStore, ItemStorage storage, bool keysOnly)
{
ItemStorageConfig config = storage.Config;
Document document = storage.Document;
foreach (PropertyStorage propertyStorage in config.AllPropertyStorage)
{
// if only keys are being serialized, skip non-key properties
// still include version, however, to populate the storage.CurrentVersion field
if (keysOnly && !propertyStorage.IsHashKey && !propertyStorage.IsRangeKey && !propertyStorage.IsVersion)
{
continue;
}
string propertyName = propertyStorage.PropertyName;
string attributeName = propertyStorage.AttributeName;
object value;
if (TryGetValue(toStore, propertyStorage.Member, out value))
{
DynamoDBEntry dbe = ToDynamoDBEntry(propertyStorage.MemberType, value, propertyStorage.Converter);
if (ShouldSave(dbe))
{
if (propertyStorage.IsHashKey || propertyStorage.IsRangeKey || propertyStorage.IsVersion)
{
if (dbe is PrimitiveList)
{
throw new InvalidOperationException("Property " + propertyName + " is a hash key, range key or version property and cannot be PrimitiveList");
}
}
document[attributeName] = dbe;
if (propertyStorage.IsVersion)
{
storage.CurrentVersion = dbe as Primitive;
}
}
}
else
{
throw new InvalidOperationException("Unable to retrieve value from property " + propertyName);
}
}
}
private static Document CreateExpectedDocumentForVersion(ItemStorage storage)
{
Document document = new Document();
if (storage.Config.HasVersion)
{
string versionAttributeName = storage.Config.VersionPropertyStorage.AttributeName;
if (storage.CurrentVersion == null)
{
document[versionAttributeName] = null;
}
else
{
document[versionAttributeName] = storage.CurrentVersion;
}
}
return(document);
}
// Serializing an object into a DynamoDB document
private static ItemStorage ObjectToItemStorage <T>(T toStore, bool keysOnly, bool ignoreNullValues)
{
if (toStore == null)
{
return(null);
}
Type objectType = typeof(T);
ItemStorageConfig config = ItemStorageConfigCache.GetConfig(objectType);
if (config == null)
{
return(null);
}
ItemStorage storage = ObjectToItemStorage <T>(toStore, keysOnly, ignoreNullValues, config);
return(storage);
}
// Searching
private IEnumerable <T> FromSearch <T>(Search search)
{
if (search == null)
{
throw new ArgumentNullException("search");
}
ItemStorageConfig storageConfig = ItemStorageConfigCache.GetConfig <T>();
while (!search.IsDone)
{
List <Document> set = search.GetNextSet();
foreach (var document in set)
{
ItemStorage storage = new ItemStorage(storageConfig);
storage.Document = document;
T instance = DocumentToObject <T>(storage);
yield return(instance);
}
}
}
// Deserializing DynamoDB document into an object
private static T DocumentToObject <T>(ItemStorage storage)
{
Type type = typeof(T);
return((T)DocumentToObject(type, storage));
}
