public virtual object Transform(object entity, Type entityType, QueryProcessingEntitiesContext context)
{
return(entity);
}
private void LoadResults()
{
var query = _queryContainer.Compile(out var columns);
var dbCommand =
_queryContainer.AccessLayer.Database
.CreateCommandWithParameterValues(query.Query, query.Parameters.ToArray());
foreach (var queryCommandInterceptor in _queryContainer.Interceptors)
{
dbCommand = queryCommandInterceptor.NonQueryExecuting(dbCommand);
if (dbCommand == null)
{
throw new InvalidOperationException($"The Command interceptor: " +
$"'{queryCommandInterceptor}' has returned null");
}
}
var dataRecords = _queryContainer.AccessLayer.EnumerateDataRecordsAsync(dbCommand)
.ToArray();
if (_queryContainer.PostProcessors.Any())
{
var context = new QueryProcessingRecordsContext(_queryContainer, _queryContainer.PostProcessors, columns);
foreach (var queryContainerPostProcessor in _queryContainer.PostProcessors)
{
dataRecords = queryContainerPostProcessor.Transform(dataRecords, _type, context);
}
columns = context.Columns;
}
var relations = new List <Tuple <QueryIdentifier, QueryIdentifier, RelationProcessor> >();
if (_queryContainer.Joins.Any())
{
var queryProcessingRecordsContext = new QueryProcessingRecordsContext(_queryContainer,
_queryContainer.PostProcessors,
columns);
foreach (var queryContainerJoin in _queryContainer.Joins)
{
var relationProcessor = new RelationProcessor(queryContainerJoin);
relations.Add(new Tuple <QueryIdentifier, QueryIdentifier, RelationProcessor>(
queryContainerJoin.Alias,
queryContainerJoin.SourceTable,
relationProcessor));
dataRecords = relationProcessor
.JoinTables(dataRecords,
queryContainerJoin.TargetTableType,
queryProcessingRecordsContext);
}
foreach (var queryContainerJoin in relations)
{
dataRecords = queryContainerJoin
.Item3
.DoJoinMapping(dataRecords,
queryContainerJoin.Item1,
queryProcessingRecordsContext,
true,
true);
}
columns = queryProcessingRecordsContext.Columns;
}
var columnNames = columns.Select(f => f.NaturalName).ToArray();
dataRecords = dataRecords.Select(record =>
new EagarDataRecord(columnNames, record.MetaHeader.ToArray()))
.ToArray();
var records = Partitioner.Create(dataRecords, true)
.AsParallel()
.AsOrdered()
.Select((dataRecord) => _queryContainer.AccessLayer
.SetPropertysViaReflection(_queryContainer.AccessLayer.GetClassInfo(_type),
dataRecord))
.ToArray();
var elements = new ArrayList();
if (_queryContainer.PostProcessors.Any())
{
var context = new QueryProcessingEntitiesContext(records);
foreach (var element in records)
{
var item = element;
foreach (var queryContainerPostProcessor in _queryContainer.PostProcessors)
{
item = queryContainerPostProcessor.Transform(item, _type, context);
}
elements.Add(item);
}
}
else
{
elements.AddRange(records);
}
_elements = elements.GetEnumerator();
}
