public TableResult Execute(TableOperation operation)
{
TableOperationType operationType = operation.OperationType;
ITableEntity entity = operation.Entity;
Tuple <string, string> key;
IDictionary <string, EntityProperty> writeProperties;
if (operation.OperationType != TableOperationType.Retrieve)
{
key = new Tuple <string, string>(entity.PartitionKey, entity.RowKey);
writeProperties = entity.WriteEntity(operationContext: null);
}
else
{
key = new Tuple <string, string>(operation.RetrievePartitionKey(), operation.RetrieveRowKey());
writeProperties = null;
}
switch (operation.OperationType)
{
case TableOperationType.Retrieve:
TableItem item = _entities[key];
// Func<string, string, DateTimeOffset, IDictionary<string, EntityProperty>, string, object>
var resolver = operation.RetrieveResolver();
return(new TableResult
{
Result = resolver(operation.RetrievePartitionKey(),
operation.RetrieveRowKey(), item.Timestamp, item.CloneProperties(), item.ETag)
});
case TableOperationType.Insert:
if (!_entities.TryAdd(key, new TableItem(writeProperties)))
{
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture,
"Entity PK='{0}',RK='{1}' already exists.", entity.PartitionKey, entity.RowKey));
}
return(new TableResult());
case TableOperationType.Replace:
if (entity.ETag == null)
{
throw new InvalidOperationException("Replace requires an ETag.");
}
else if (!_entities.TryUpdate(key, new TableItem(writeProperties), new TableItem(entity.ETag)))
{
if (entity.ETag == "*")
{
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture,
"Entity PK='{0}',RK='{1}' does not exist.", entity.PartitionKey, entity.RowKey));
}
else
{
throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture,
"Entity PK='{0}',RK='{1}' does not match eTag '{2}'.", entity.PartitionKey,
entity.RowKey, entity.ETag));
}
}
return(new TableResult());
default:
throw new InvalidOperationException(
"Unsupported operation type " + operationType.ToString());
}
}