public async Task Execute(CancellationToken token = default(CancellationToken))
{
var map = _identityMap.ForQuery();
if (!_items.Any())
{
return;
}
await _runner.ExecuteAsync(_command, async (cmd, tk) =>
{
using (var reader = await _command.ExecuteReaderAsync(tk).ConfigureAwait(false))
{
await _items[0].Read(reader, map, token).ConfigureAwait(false);
var others = _items.Skip(1).ToArray();
foreach (var item in others)
{
var hasNext = await reader.NextResultAsync(token).ConfigureAwait(false);
if (!hasNext)
{
throw new InvalidOperationException("There is no next result to read over.");
}
await item.Read(reader, map, token).ConfigureAwait(false);
}
}
return(0);
}, token).ConfigureAwait(false);
}
public IReadOnlyList <T> Query <T>(string sql, params object[] parameters)
{
assertNotDisposed();
var handler = new UserSuppliedQueryHandler <T>(_store, sql, parameters);
return(_connection.Fetch(handler, _identityMap.ForQuery(), null, Tenant));
}
public IList <T> Query <T>(string sql, params object[] parameters)
{
assertNotDisposed();
var handler = new UserSuppliedQueryHandler <T>(_schema, _serializer, sql, parameters);
return(_connection.Fetch(handler, _identityMap.ForQuery(), null));
}
public static Task <IList <T> > ResolveAsync <T>(this IManagedConnection runner, NpgsqlCommand cmd, ISelector <T> selector, IIdentityMap map, QueryStatistics stats, CancellationToken token)
{
var selectMap = map.ForQuery();
return(runner.ExecuteAsync(cmd, async(c, tkn) =>
{
var list = new List <T>();
using (var reader = await cmd.ExecuteReaderAsync(tkn).ConfigureAwait(false))
{
while (await reader.ReadAsync(tkn).ConfigureAwait(false))
{
list.Add(selector.Resolve(reader, selectMap, stats));
}
}
return list.As <IList <T> >();
}, token));
}
public static IList <T> Resolve <T>(this IManagedConnection runner, NpgsqlCommand cmd, ISelector <T> selector, IIdentityMap map, QueryStatistics stats)
{
var selectMap = map.ForQuery();
return(runner.Execute(cmd, c =>
{
var list = new List <T>();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
list.Add(selector.Resolve(reader, selectMap, stats));
}
}
return list;
}));
}
