private object BuildDelegate <T>(MetadataForModel metadata)
{
var dynamicMethod = GetDynamicMethod <T>();
using (var il = new GroboIL(dynamicMethod))
{
il.Ldarg(0);
il.Callnonvirt(GetStartRowMethod());
foreach (var emitInfo in metadata.EmitInfos)
{
il.Ldarg(0);
il.Ldarg(1);
il.Callnonvirt(emitInfo.Getter);
if (emitInfo.PostgresType != null)
{
il.Ldc_I4((int)emitInfo.PostgresType.Value);
}
il.Callnonvirt(emitInfo.WriteMethod);
}
il.Ret();
}
return(dynamicMethod.CreateDelegate(typeof(Action <NpgsqlBinaryImporter, T>)));
}
public string GetSql(MetadataForModel metadata)
{
var colNames = metadata.EmitInfos.Select(x => x.PostgresName).ToArray();
return($"COPY {metadata.TableName} ({string.Join(',', colNames)})" +
$" FROM STDIN (FORMAT BINARY)");
}
public Action <NpgsqlBinaryImporter, T> GetDelegate <T>(MetadataForModel metadata)
{
return((Action <NpgsqlBinaryImporter, T>)BuildDelegate <T>(metadata));
}
