public Task Retrieve(IEnumerable <object> keys, TypedRetrieveCallback <TableRow> callback)
{
//Compute direct keys
List <byte[]> directKeys = keys.Select(m => m.GetType() == typeof(byte[]) ? m as byte[] : m.Serialize()).Select(m =>
{
return(GenerateKey(m));
}).ToList();
return(RetrieveDirect(directKeys, callback));
}
async Task RetrieveDirect(byte[] start, byte[] end, TypedRetrieveCallback <TableRow> callback)
{
await db.Retrieve(start, end, elems => {
return(callback(elems.Select(m => {
byte[] newkey = new byte[m.Key.Length - tableName.Length];
Buffer.BlockCopy(m.Key, tableName.Length, newkey, 0, newkey.Length);
m.Key = newkey;
TableRow retval = new TableRow();
BinaryReader mreader = new BinaryReader(new MemoryStream(m.Value));
retval.Key = m.Key;
while (mreader.BaseStream.Position != mreader.BaseStream.Length)
{
retval[mreader.ReadNullTerminatedString()] = DataFormats.Deserialize(mreader);
}
return retval;
})));
});
}
public Task Retrieve <T>(IEnumerable <object> keys, TypedRetrieveCallback <T> callback) where T : class, new()
{
return(Retrieve(keys, rows => callback(rows.Select(m => m.As <T>()))));
}
internal Task RangeRetrieve(byte[] start, byte[] end, TypedRetrieveCallback <TableRow> callback)
{
return(RetrieveDirect(GenerateKey(start), GenerateKey(end), callback));
}
