internal static IEnumerable <T> MapReader <T>(this DbContext context, DbDataReader reader) where T : class
{
#if EF5 || EF6
return(((IObjectContextAdapter)context).ObjectContext.Translate <T>(reader));
#elif EFCORE
bool isEFCore2x = false;
var list = new List <T>();
var query = (IQueryable <T>)context.Set <T>();
// REFLECTION: Query._context.StateManager
var stateManagerProperty = typeof(DbContext).GetProperty("StateManager", BindingFlags.NonPublic | BindingFlags.Instance);
var stateManager = (StateManager)stateManagerProperty.GetValue(context);
// REFLECTION: Query._context.StateManager._concurrencyDetector
var concurrencyDetectorField = typeof(StateManager).GetField("_concurrencyDetector", BindingFlags.NonPublic | BindingFlags.Instance);
var concurrencyDetector = (IConcurrencyDetector)concurrencyDetectorField.GetValue(stateManager);
// REFLECTION: Query.Provider._queryCompiler
var queryCompilerField = typeof(EntityQueryProvider).GetField("_queryCompiler", BindingFlags.NonPublic | BindingFlags.Instance);
var queryCompiler = queryCompilerField.GetValue(query.Provider);
// REFLECTION: Query.Provider.NodeTypeProvider (Use property for nullable logic)
var nodeTypeProviderField = queryCompiler.GetType().GetProperty("NodeTypeProvider", BindingFlags.NonPublic | BindingFlags.Instance);
var nodeTypeProvider = nodeTypeProviderField.GetValue(queryCompiler);
// REFLECTION: Query.Provider._queryCompiler.CreateQueryParser();
var createQueryParserMethod = queryCompiler.GetType().GetMethod("CreateQueryParser", BindingFlags.NonPublic | BindingFlags.Static);
var createQueryParser = (QueryParser)createQueryParserMethod.Invoke(null, new[] { nodeTypeProvider });
// REFLECTION: Query.Provider._queryCompiler._database
var databaseField = queryCompiler.GetType().GetField("_database", BindingFlags.NonPublic | BindingFlags.Instance);
var database = (IDatabase)databaseField.GetValue(queryCompiler);
// REFLECTION: Query.Provider._queryCompiler._evaluatableExpressionFilter
var evaluatableExpressionFilterField = queryCompiler.GetType().GetField("_evaluatableExpressionFilter", BindingFlags.NonPublic | BindingFlags.Static);
var evaluatableExpressionFilter = (IEvaluatableExpressionFilter)evaluatableExpressionFilterField.GetValue(null);
// REFLECTION: Query.Provider._queryCompiler._queryContextFactory
var queryContextFactoryField = queryCompiler.GetType().GetField("_queryContextFactory", BindingFlags.NonPublic | BindingFlags.Instance);
var queryContextFactory = (IQueryContextFactory)queryContextFactoryField.GetValue(queryCompiler);
// REFLECTION: Query.Provider._queryCompiler._queryContextFactory.CreateQueryBuffer
var createQueryBufferDelegateMethod = (typeof(QueryContextFactory)).GetMethod("CreateQueryBuffer", BindingFlags.NonPublic | BindingFlags.Instance);
var createQueryBufferDelegate = (Func <IQueryBuffer>)createQueryBufferDelegateMethod.CreateDelegate(typeof(Func <IQueryBuffer>), queryContextFactory);
// REFLECTION: Query.Provider._queryCompiler._queryContextFactory._connection
var connectionField = queryContextFactory.GetType().GetField("_connection", BindingFlags.NonPublic | BindingFlags.Instance);
var connection = (IRelationalConnection)connectionField.GetValue(queryContextFactory);
// REFLECTION: Query.Provider._queryCompiler._database._queryCompilationContextFactory
object logger;
var dependenciesProperty = typeof(Database).GetProperty("Dependencies", BindingFlags.NonPublic | BindingFlags.Instance);
IQueryCompilationContextFactory queryCompilationContextFactory;
if (dependenciesProperty != null)
{
// EF Core 2.x
isEFCore2x = true;
var dependencies = dependenciesProperty.GetValue(database);
var queryCompilationContextFactoryField = typeof(DbContext).GetTypeFromAssembly_Core("Microsoft.EntityFrameworkCore.Storage.DatabaseDependencies")
.GetProperty("QueryCompilationContextFactory", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
queryCompilationContextFactory = (IQueryCompilationContextFactory)queryCompilationContextFactoryField.GetValue(dependencies);
var dependenciesProperty2 = typeof(QueryCompilationContextFactory).GetProperty("Dependencies", BindingFlags.NonPublic | BindingFlags.Instance);
var dependencies2 = dependenciesProperty2.GetValue(queryCompilationContextFactory);
// REFLECTION: Query.Provider._queryCompiler._database._queryCompilationContextFactory.Logger
var loggerField = typeof(DbContext).GetTypeFromAssembly_Core("Microsoft.EntityFrameworkCore.Query.Internal.QueryCompilationContextDependencies")
.GetProperty("Logger", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
// (IInterceptingLogger<LoggerCategory.Query>)
logger = loggerField.GetValue(dependencies2);
}
else
{
// EF Core 1.x
var queryCompilationContextFactoryField = typeof(Database).GetField("_queryCompilationContextFactory", BindingFlags.NonPublic | BindingFlags.Instance);
queryCompilationContextFactory = (IQueryCompilationContextFactory)queryCompilationContextFactoryField.GetValue(database);
// REFLECTION: Query.Provider._queryCompiler._database._queryCompilationContextFactory.Logger
var loggerField = queryCompilationContextFactory.GetType().GetProperty("Logger", BindingFlags.NonPublic | BindingFlags.Instance);
//
logger = loggerField.GetValue(queryCompilationContextFactory);
}
// CREATE connection
var queryConnection = context.Database.GetService <IRelationalConnection>();
var innerConnection = new CreateEntityConnection(queryConnection.DbConnection, null);
//QueryConnection.DbConnection = innerConnection;
var innerConnectionField = typeof(RelationalConnection).GetField("_connection", BindingFlags.NonPublic | BindingFlags.Instance);
innerConnectionField.SetValue(queryConnection, new Microsoft.EntityFrameworkCore.Internal.LazyRef <DbConnection>(() => innerConnection));
// CREATE query context
RelationalQueryContext queryContext;
{
var relationalQueryContextType = typeof(RelationalQueryContext);
var relationalQueryContextConstructor = relationalQueryContextType.GetConstructors()[0];
// EF Core 1.1 preview
if (relationalQueryContextConstructor.GetParameters().Length == 5)
{
// REFLECTION: Query.Provider._queryCompiler._queryContextFactory.ExecutionStrategyFactory
var executionStrategyFactoryField = queryContextFactory.GetType().GetProperty("ExecutionStrategyFactory", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.FlattenHierarchy);
var executionStrategyFactory = executionStrategyFactoryField.GetValue(queryContextFactory);
var lazyRefStateManager = LazyHelper.NewLazy(() => stateManager);
queryContext = (RelationalQueryContext)relationalQueryContextConstructor.Invoke(new object[] { createQueryBufferDelegate, connection, lazyRefStateManager, concurrencyDetector, executionStrategyFactory });
}
else
{
queryContext = (RelationalQueryContext)relationalQueryContextConstructor.Invoke(new object[] { createQueryBufferDelegate, connection, stateManager, concurrencyDetector });
}
}
Expression newQuery;
if (isEFCore2x)
{
var parameterExtractingExpressionVisitorConstructor = typeof(ParameterExtractingExpressionVisitor).GetConstructors().First(x => x.GetParameters().Length == 5);
var parameterExtractingExpressionVisitor = (ParameterExtractingExpressionVisitor)parameterExtractingExpressionVisitorConstructor.Invoke(new object[] { evaluatableExpressionFilter, queryContext, logger, true, false });
// CREATE new query from query visitor
newQuery = parameterExtractingExpressionVisitor.ExtractParameters(query.Expression);
}
else
{
// CREATE new query from query visitor
var extractParametersMethods = typeof(ParameterExtractingExpressionVisitor).GetMethod("ExtractParameters", BindingFlags.Public | BindingFlags.Static);
newQuery = (Expression)extractParametersMethods.Invoke(null, new object[] { query.Expression, queryContext, evaluatableExpressionFilter, logger });
}
// PARSE new query
var queryModel = createQueryParser.GetParsedQuery(newQuery);
// CREATE query model visitor
var queryModelVisitor = (RelationalQueryModelVisitor)queryCompilationContextFactory.Create(false).CreateQueryModelVisitor();
// REFLECTION: Query.Provider._queryCompiler._database._queryCompilationContextFactory.Create(false).CreateQueryModelVisitor().CreateQueryExecutor()
var createQueryExecutorMethod = queryModelVisitor.GetType().GetMethod("CreateQueryExecutor");
var createQueryExecutorMethodGeneric = createQueryExecutorMethod.MakeGenericMethod(query.ElementType);
var queryExecutor = (Func <QueryContext, IEnumerable <T> >)createQueryExecutorMethodGeneric.Invoke(queryModelVisitor, new[] { queryModel });
// CREATE a fake reader since EntityFramework close it
((CreateEntityConnection)queryConnection.DbConnection).OriginalDataReader = new CreateEntityDataReader(reader);;
var queryEnumerable = queryExecutor(queryContext);
var enumerator = queryEnumerable.GetEnumerator();
while (enumerator.MoveNext())
{
list.Add(enumerator.Current);
}
return(list);
#endif
}