public void Initialization_CurrentSequence_Assignable ()
{
var sequence = new StreamedSequenceInfo (typeof (object[]), _stringExpression);
Assert.That (sequence.ResultItemType, Is.EqualTo (typeof (object)));
Assert.That (sequence.ItemExpression.Type, Is.EqualTo (typeof (string)));
}
public void Initialization_CurrentSequence_Assignable()
{
var sequence = new StreamedSequenceInfo(typeof(object[]), _stringExpression);
Assert.That(sequence.ResultItemType, Is.EqualTo(typeof(object)));
Assert.That(sequence.ItemExpression.Type, Is.EqualTo(typeof(string)));
}
public override void VisitSelectClause(
[NotNull] SelectClause selectClause, [NotNull] QueryModel queryModel)
{
Check.NotNull(selectClause, nameof(selectClause));
Check.NotNull(queryModel, nameof(queryModel));
if (_streamedSequenceInfo != null)
{
return;
}
var selector
= ReplaceClauseReferences(
CreateProjectionExpressionTreeVisitor(queryModel.MainFromClause)
.VisitExpression(selectClause.Selector),
inProjection: true);
_expression
= Expression.Call(
LinqOperatorProvider.Select
.MakeGenericMethod(typeof(QuerySourceScope), selector.Type),
_expression,
Expression.Lambda(selector, QuerySourceScopeParameter));
_streamedSequenceInfo
= new StreamedSequenceInfo(
typeof(IEnumerable <>).MakeGenericType(selector.Type),
selector);
}
public override void VisitResultOperator(
[NotNull] ResultOperatorBase resultOperator, [NotNull] QueryModel queryModel, int index)
{
Check.NotNull(resultOperator, nameof(resultOperator));
Check.NotNull(queryModel, nameof(queryModel));
var expression
= _queryCompilationContext.ResultOperatorHandler
.HandleResultOperator(this, resultOperator, queryModel);
if (expression != _expression)
{
_expression = expression;
if (_streamedSequenceInfo != null &&
resultOperator is SequenceFromSequenceResultOperatorBase)
{
var sequenceType = _expression.Type.GetSequenceType();
_streamedSequenceInfo
= new StreamedSequenceInfo(
typeof(IEnumerable <>).MakeGenericType(sequenceType),
Expression.Default(sequenceType));
}
else
{
_streamedSequenceInfo = null;
}
}
}
public override void VisitSelectClause(
[NotNull] SelectClause selectClause, [NotNull] QueryModel queryModel)
{
Check.NotNull(selectClause, "selectClause");
Check.NotNull(queryModel, "queryModel");
if (_streamedSequenceInfo != null)
{
return;
}
var selector
= ReplaceClauseReferences(
CreateProjectionExpressionTreeVisitor()
.VisitExpression(selectClause.Selector));
_expression
= Expression.Call(
LinqOperatorProvider.Select
.MakeGenericMethod(typeof(QuerySourceScope), selector.Type),
_expression,
Expression.Lambda(selector, QuerySourceScopeParameter));
_streamedSequenceInfo
= (StreamedSequenceInfo)selectClause.GetOutputDataInfo()
.AdjustDataType(typeof(IEnumerable <>));
}
// ReSharper disable once UnusedParameter.Local
private StreamedValueInfo GetOutputDataInfo([NotNull] StreamedSequenceInfo sequenceInfo)
{
Assertion.DebugAssert(Func.Type.GetTypeInfo().IsGenericTypeDefinition == false);
var aggregatedType = Func.Type.GetTypeInfo().GenericTypeArguments[0];
if (!aggregatedType.GetTypeInfo().IsAssignableFrom(Seed.Type.GetTypeInfo()))
{
var message = string.Format(
"The seed expression and the aggregating function don't have matching types. The seed is of type '{0}', but the function aggregates '{1}'.",
Seed.Type,
aggregatedType);
throw new InvalidOperationException(message);
}
Assertion.DebugAssert(OptionalResultSelector == null || OptionalResultSelector.Type.GetTypeInfo().IsGenericTypeDefinition == false);
var resultTransformedType = OptionalResultSelector != null?OptionalResultSelector.Type.GetTypeInfo().GenericTypeArguments[0] : null;
if (resultTransformedType != null && aggregatedType != resultTransformedType)
{
var message = string.Format(
"The aggregating function and the result selector don't have matching types. The function aggregates type '{0}', "
+ "but the result selector takes '{1}'.",
aggregatedType,
resultTransformedType);
throw new InvalidOperationException(message);
}
var resultType = GetResultType();
return(new StreamedScalarValueInfo(resultType));
}
public void CheckSequenceItemType_SameType()
{
var sequenceInfo = new StreamedSequenceInfo(typeof(int[]), Expression.Constant(0));
var expectedItemType = typeof(int);
Assert.That(() => _resultOperator.CheckSequenceItemType(sequenceInfo, expectedItemType), Throws.Nothing);
}
public void CheckSequenceItemType_ExpectedAssignableFromSequenceItem()
{
var sequenceInfo = new StreamedSequenceInfo(typeof(string[]), Expression.Constant("t"));
var expectedItemType = typeof(object);
Assert.That(() => _resultOperator.CheckSequenceItemType(sequenceInfo, expectedItemType), Throws.Nothing);
}
public void GetOutputDataInfo_DefaultWhenEmpty ()
{
var studentExpression = Expression.Constant (new Cook ());
var input = new StreamedSequenceInfo (typeof (Cook[]), studentExpression);
Assert.That (((StreamedSingleValueInfo) _resultOperatorWithDefaultWhenEmpty.GetOutputDataInfo (input)).ReturnDefaultWhenEmpty, Is.True);
Assert.That (((StreamedSingleValueInfo) _resultOperatorNoDefaultWhenEmpty.GetOutputDataInfo (input)).ReturnDefaultWhenEmpty, Is.False);
}
public void UpdateDataInfo()
{
var streamDataInfo = new StreamedSequenceInfo(typeof(Cook[]), Expression.Constant(new Cook()));
_handler.UpdateDataInfo(_resultOperator, _statementBuilder, streamDataInfo);
Assert.That(_statementBuilder.DataInfo, Is.TypeOf(typeof(StreamedSingleValueInfo)));
}
private StreamedValueInfo GetOutputDataInfo([NotNull] StreamedSequenceInfo sequenceInfo)
{
var expectedItemType = GetExpectedItemType();
CheckSequenceItemType(sequenceInfo, expectedItemType);
return(new StreamedScalarValueInfo(Func.Body.Type));
}
public void GetOutputDataInfo_DefaultWhenEmpty()
{
var studentExpression = Expression.Constant(new Cook());
var input = new StreamedSequenceInfo(typeof(Cook[]), studentExpression);
Assert.That(((StreamedSingleValueInfo)_resultOperatorWithDefaultWhenEmpty.GetOutputDataInfo(input)).ReturnDefaultWhenEmpty, Is.True);
Assert.That(((StreamedSingleValueInfo)_resultOperatorNoDefaultWhenEmpty.GetOutputDataInfo(input)).ReturnDefaultWhenEmpty, Is.False);
}
private static TResult ExecuteResultOperator <TSource, TResult>(
IEnumerable <TSource> source, ResultOperatorBase resultOperator, StreamedSequenceInfo streamedSequenceInfo)
{
var streamedData
= resultOperator.ExecuteInMemory(
new StreamedSequence(source, streamedSequenceInfo));
return((TResult)streamedData.Value);
}
protected AsyncStreamedValueInfo GetOutputDataInfo(StreamedSequenceInfo streamedSequenceInfo)
{
if (streamedSequenceInfo == null)
{
throw new ArgumentNullException(nameof(streamedSequenceInfo));
}
return(new AsyncStreamedScalarValueInfo(typeof(Task <long>)));
}
public void GetOutputDataInfo_CovariantSequence ()
{
var studentExpression = Expression.Constant (0.0f);
var input = new StreamedSequenceInfo (typeof (object[]), studentExpression);
var result = _resultOperator.GetOutputDataInfo (input);
Assert.That (result, Is.InstanceOf (typeof (StreamedValueInfo)));
Assert.That (result.DataType, Is.SameAs (typeof (object)));
}
public void MakeClosedGenericExecuteMethod_WithCovariantDataType()
{
var info = new StreamedSequenceInfo(typeof(IEnumerable <object>), _stringExpression);
var executeMethod = typeof(CountResultOperator).GetMethod("ExecuteInMemory", new[] { typeof(StreamedSequence) });
var result = info.MakeClosedGenericExecuteMethod(executeMethod);
Assert.That(result.GetGenericArguments(), Is.EqualTo(new[] { typeof(object) }));
}
public void GetOutputDataInfo_OutputTypeEqualsItemTypeByDefault ()
{
var studentExpression = Expression.Constant (new Cook ());
var input = new StreamedSequenceInfo (typeof (Cook[]), studentExpression);
var result = _resultOperator.GetOutputDataInfo (input);
Assert.That (result, Is.InstanceOf (typeof (StreamedValueInfo)));
Assert.That (result.DataType, Is.SameAs (typeof (Cook)));
}
public void GetOutputDataInfo_WithoutResultSelector()
{
var itemExpression = Expression.Constant(0);
var input = new StreamedSequenceInfo(typeof(int[]), itemExpression);
var result = _resultOperatorWithoutResultSelector.GetOutputDataInfo(input);
Assert.That(result, Is.InstanceOf(typeof(StreamedScalarValueInfo)));
Assert.That(result.DataType, Is.SameAs(typeof(int)));
}
public void GetOutputDataInfo_NonMatchingFunc()
{
_resultOperatorWithResultSelector.Seed = Expression.Constant("0");
var itemExpression = Expression.Constant(0);
var input = new StreamedSequenceInfo(typeof(int[]), itemExpression);
_resultOperatorWithResultSelector.GetOutputDataInfo(input);
}
public void GetOutputDataInfo ()
{
var studentExpression = Expression.Constant (new Cook ());
var input = new StreamedSequenceInfo (typeof (object[]), studentExpression);
var result = _resultOperatorNoDefaultWhenEmpty.GetOutputDataInfo (input);
Assert.That (result, Is.InstanceOf (typeof (StreamedSingleValueInfo)));
Assert.That (result.DataType, Is.SameAs (typeof (object)));
}
public void GetOutputDataInfo()
{
var studentExpression = Expression.Constant(new Cook());
var input = new StreamedSequenceInfo(typeof(Cook[]), studentExpression);
var result = _resultOperator.GetOutputDataInfo(input);
Assert.That(result, Is.InstanceOf(typeof(StreamedValueInfo)));
Assert.That(result.DataType, Is.SameAs(typeof(int)));
}
private void CheckOutputDataInfo(Type itemType, Type expectedOutputType)
{
var itemExpression = Expression.Constant(Activator.CreateInstance(itemType), itemType);
var inputInfo = new StreamedSequenceInfo(itemType.MakeArrayType(), itemExpression);
var outputInfo = _resultOperator.GetOutputDataInfo(inputInfo);
Assert.That(outputInfo, Is.InstanceOf(typeof(StreamedValueInfo)));
Assert.That(outputInfo.DataType, Is.SameAs(expectedOutputType));
}
public void CheckSequenceItemType_DifferentTypes()
{
var sequenceInfo = new StreamedSequenceInfo(typeof(string[]), Expression.Constant("t"));
var expectedItemType = typeof(int);
Assert.That(
() => _resultOperator.CheckSequenceItemType(sequenceInfo, expectedItemType),
Throws.ArgumentException.With.Message.EqualTo(
"The input sequence must have items of type 'System.Int32', but it has items of type 'System.String'.\r\nParameter name: inputInfo"));
}
public void CheckSequenceItemType_SequenceItemAssignableFromExpected()
{
var sequenceInfo = new StreamedSequenceInfo(typeof(object[]), Expression.Constant(null, typeof(object)));
var expectedItemType = typeof(string);
Assert.That(
() => _resultOperator.CheckSequenceItemType(sequenceInfo, expectedItemType),
Throws.ArgumentException.With.Message.EqualTo(
"The input sequence must have items of type 'System.String', but it has items of type 'System.Object'.\r\nParameter name: inputInfo"));
}
public void AdjustDataType_GenericTypeDefinition_FromCovariantDataType()
{
var info = new StreamedSequenceInfo(typeof(IEnumerable <object>), _stringExpression);
var result = info.AdjustDataType(typeof(IQueryable <>));
Assert.That(result, Is.Not.SameAs(info));
Assert.That(result, Is.TypeOf(typeof(StreamedSequenceInfo)));
Assert.That(result.DataType, Is.SameAs(typeof(IQueryable <object>)));
Assert.That(((StreamedSequenceInfo)result).ResultItemType, Is.SameAs(typeof(object)));
Assert.That(((StreamedSequenceInfo)result).ItemExpression, Is.SameAs(_stringExpression));
}
public void GetOutputDataInfo ()
{
var itemExpression = Expression.Constant (Expression.Constant (new Cook ()));
var input = new StreamedSequenceInfo (typeof (object[]), itemExpression);
// Works because int is assignable to object - the ItemExpression of type Cook isn't checked here
var result = _resultOperator.GetOutputDataInfo (input);
Assert.That (result, Is.InstanceOf (typeof (StreamedScalarValueInfo)));
Assert.That (result.DataType, Is.SameAs (typeof (bool)));
}
protected AsyncStreamedValueInfo GetOutputDataInfo(StreamedSequenceInfo streamedSequenceInfo)
{
if (streamedSequenceInfo == null)
{
throw new ArgumentNullException(nameof(streamedSequenceInfo));
}
var resultType = typeof(Task <>).MakeGenericType(streamedSequenceInfo.ResultItemType);
return(new AsyncStreamedScalarValueInfo(resultType));
}
protected AsyncStreamedValueInfo GetOutputDataInfo(StreamedSequenceInfo streamedSequenceInfo)
{
if (streamedSequenceInfo == null)
{
throw new ArgumentNullException(nameof(streamedSequenceInfo));
}
var taskType = typeof(Task <>).MakeGenericType(streamedSequenceInfo.ResultItemType);
return(new AsyncStreamedSingleValueInfo(taskType, ReturnDefaultWhenEmpty));
}
public void GetOutputDataInfo()
{
var itemExpression = Expression.Constant(Expression.Constant(new Cook()));
var input = new StreamedSequenceInfo(typeof(object[]), itemExpression);
// Works because int is assignable to object - the ItemExpression of type Cook isn't checked here
var result = _resultOperator.GetOutputDataInfo(input);
Assert.That(result, Is.InstanceOf(typeof(StreamedScalarValueInfo)));
Assert.That(result.DataType, Is.SameAs(typeof(bool)));
}
public void GetOutputDataInfo_Covariant()
{
var func = CreateFunc <IComparable, IComparable, string> ((i1, i2) => null);
var resultOperator = new AggregateResultOperator(func);
var itemExpression = Expression.Constant("test");
var input = new StreamedSequenceInfo(typeof(string[]), itemExpression);
var result = resultOperator.GetOutputDataInfo(input);
Assert.That(result, Is.InstanceOf(typeof(StreamedScalarValueInfo)));
Assert.That(result.DataType, Is.SameAs(typeof(string)));
}
public void GetOutputDataInfo()
{
var cookExpression = Expression.Constant(new Cook());
var input = new StreamedSequenceInfo(typeof(object[]), cookExpression);
var result = _resultOperator.GetOutputDataInfo(input);
Assert.That(result, Is.InstanceOf(typeof(StreamedSequenceInfo)));
Assert.That(result, Is.Not.SameAs(input));
Assert.That(result.DataType, Is.SameAs(typeof(IQueryable <object>)));
Assert.That(((StreamedSequenceInfo)result).ItemExpression, Is.SameAs(cookExpression));
Assert.That(((StreamedSequenceInfo)result).ResultItemType, Is.SameAs(typeof(object)));
}
public void GetOutputDataInfo ()
{
var cookExpression = Expression.Constant (new Cook ());
var input = new StreamedSequenceInfo (typeof (object[]), cookExpression);
var result = _resultOperator.GetOutputDataInfo (input);
Assert.That (result, Is.InstanceOf (typeof (StreamedSequenceInfo)));
Assert.That (result, Is.Not.SameAs (input));
Assert.That (result.DataType, Is.SameAs (typeof (IQueryable<object>)));
Assert.That (((StreamedSequenceInfo) result).ItemExpression, Is.SameAs (cookExpression));
Assert.That (((StreamedSequenceInfo) result).ResultItemType, Is.SameAs (typeof (object)));
}
public void GetOutputDataInfo_AssignableSource2()
{
var resultOperator = new UnionResultOperator("i", typeof(object), Expression.Constant(new[] { "string" }));
var cookExpression = Expression.Constant(null, typeof(Cook));
var input = new StreamedSequenceInfo(typeof(Cook[]), cookExpression);
var result = resultOperator.GetOutputDataInfo(input);
Assert.That(result, Is.InstanceOf(typeof(StreamedSequenceInfo)));
Assert.That(result.DataType, Is.SameAs(typeof(IQueryable <object>)));
}
public void GetOutputDataInfo()
{
var intExpression = Expression.Constant(0);
var input = new StreamedSequenceInfo(typeof(int[]), intExpression);
var result = _resultOperator.GetOutputDataInfo(input);
Assert.That(result, Is.InstanceOf(typeof(StreamedSequenceInfo)));
Assert.That(result.DataType, Is.SameAs(typeof(IQueryable <IGrouping <int, string> >)));
Assert.That(((StreamedSequenceInfo)result).ItemExpression, Is.InstanceOf(typeof(QuerySourceReferenceExpression)));
Assert.That(((QuerySourceReferenceExpression)((StreamedSequenceInfo)result).ItemExpression).ReferencedQuerySource,
Is.SameAs(_resultOperator));
}
protected void CheckSequenceItemType(StreamedSequenceInfo inputInfo, Type expectedItemType)
{
if (!expectedItemType.GetTypeInfo().IsAssignableFrom(inputInfo.ResultItemType.GetTypeInfo()))
{
var message = string.Format(
"The input sequence must have items of type '{0}', but it has items of type '{1}'.",
expectedItemType,
inputInfo.ResultItemType);
throw new ArgumentException(message, "inputInfo");
}
}
/// <summary>
/// Checks the type of the items retrieved by the sequence, throwing an <see cref="ArgumentTypeException"/> if the items don't match the
/// expected type.
/// </summary>
/// <param name="sequenceInfo">The <see cref="StreamedSequenceInfo"/> object describing the sequence.</param>
/// <param name="expectedItemType">The expected item type.</param>
/// <exception cref="ArgumentTypeException">The items don't match the expected type.</exception>
protected void CheckSequenceItemType(StreamedSequenceInfo sequenceInfo, Type expectedItemType)
{
if (sequenceInfo.ItemExpression.Type != expectedItemType)
{
var message = string.Format(
"The input sequence must have items of type '{0}', but it has items of type '{1}'.",
expectedItemType,
sequenceInfo.ItemExpression.Type);
throw new ArgumentTypeException(message, "inputInfo", typeof(IEnumerable <>).MakeGenericType(expectedItemType), sequenceInfo.ItemExpression.Type);
}
}
public void GetOutputDataInfo()
{
var studentExpression = Expression.Constant(new Cook());
var input = new StreamedSequenceInfo(typeof(Cook[]), studentExpression);
var result = _resultOperator.GetOutputDataInfo(input);
Assert.That(result, Is.InstanceOf(typeof(StreamedSequenceInfo)));
Assert.That(result.DataType, Is.SameAs(typeof(IQueryable <Chef>)));
Assert.That(((StreamedSequenceInfo)result).ItemExpression, Is.InstanceOf(typeof(UnaryExpression)));
Assert.That(((StreamedSequenceInfo)result).ItemExpression.NodeType, Is.EqualTo(ExpressionType.Convert));
Assert.That(((StreamedSequenceInfo)result).ResultItemType, Is.SameAs(typeof(Chef)));
Assert.That(((UnaryExpression)((StreamedSequenceInfo)result).ItemExpression).Operand, Is.SameAs(input.ItemExpression));
}
public void GetOutputDataInfo ()
{
var studentExpression = Expression.Constant (new Cook());
var input = new StreamedSequenceInfo (typeof (Cook[]), studentExpression);
var result = _resultOperator.GetOutputDataInfo (input);
Assert.That (result, Is.InstanceOf (typeof (StreamedSequenceInfo)));
Assert.That (result.DataType, Is.SameAs (typeof (IQueryable<Chef>)));
Assert.That (((StreamedSequenceInfo) result).ItemExpression, Is.InstanceOf (typeof (UnaryExpression)));
Assert.That (((StreamedSequenceInfo) result).ItemExpression.NodeType, Is.EqualTo (ExpressionType.Convert));
Assert.That (((StreamedSequenceInfo) result).ResultItemType, Is.SameAs (typeof (Chef)));
Assert.That (((UnaryExpression) ((StreamedSequenceInfo) result).ItemExpression).Operand, Is.SameAs (input.ItemExpression));
}
public void ResolveSelectExpression_SqlSubStatementExpressionWithStreamedSingleValueInfo ()
{
var sqlStatement = SqlStatementModelObjectMother.CreateSqlStatement_Single();
var expression = new SqlSubStatementExpression (sqlStatement);
var sqlStatementBuilder = new SqlStatementBuilder ();
_resolverMock
.Expect (mock => mock.ResolveConstantExpression (((ConstantExpression) sqlStatement.SelectProjection)))
.Return (sqlStatement.SelectProjection);
_resolverMock.Replay ();
var result = _stage.ResolveSelectExpression (expression, sqlStatementBuilder, _mappingResolutionContext);
_resolverMock.VerifyAllExpectations ();
var expectedDataInfo = new StreamedSequenceInfo (typeof (IEnumerable<>).MakeGenericType (sqlStatement.DataInfo.DataType), sqlStatement.SelectProjection);
var expectedSqlStatement = new SqlStatementBuilder (sqlStatement) { DataInfo = expectedDataInfo }.GetSqlStatement ();
Assert.That (sqlStatementBuilder.SqlTables.Count, Is.EqualTo (1));
Assert.That (((ResolvedSubStatementTableInfo) ((SqlTable) sqlStatementBuilder.SqlTables[0]).TableInfo).SqlStatement, Is.EqualTo (expectedSqlStatement));
Assert.That (result, Is.SameAs (sqlStatement.SelectProjection));
}
public void SetUp ()
{
_stringExpression = Expression.Constant ("dummy");
_infoWithStringSequence = new StreamedSequenceInfo (typeof (string[]), _stringExpression);
}
public void AdjustDataType_GenericTypeDefinition_FromCovariantDataType ()
{
var info = new StreamedSequenceInfo (typeof (IEnumerable<object>), _stringExpression);
var result = info.AdjustDataType (typeof (IQueryable<>));
Assert.That (result, Is.Not.SameAs (info));
Assert.That (result, Is.TypeOf (typeof (StreamedSequenceInfo)));
Assert.That (result.DataType, Is.SameAs (typeof (IQueryable<object>)));
Assert.That (((StreamedSequenceInfo) result).ResultItemType, Is.SameAs (typeof (object)));
Assert.That (((StreamedSequenceInfo) result).ItemExpression, Is.SameAs (_stringExpression));
}
public void ResolveTableInfo_GroupReferenceTableInfo ()
{
var sqlTable = SqlStatementModelObjectMother.CreateSqlTable (typeof (Cook));
var groupingSelect = new SqlGroupingSelectExpression (
Expression.MakeMemberAccess (new SqlTableReferenceExpression (sqlTable), typeof (Cook).GetProperty ("Name")),
Expression.MakeMemberAccess (new SqlTableReferenceExpression (sqlTable), typeof (Cook).GetProperty ("ID")));
var dataInfo = new StreamedSequenceInfo (
typeof (IEnumerable<>).MakeGenericType (groupingSelect.Type),
Expression.Constant (null, groupingSelect.Type));
var whereCondition = Expression.Constant (false);
var groupByExpression = groupingSelect.KeyExpression;
var groupingSubStatement = new SqlStatementBuilder
{
DataInfo = dataInfo,
SelectProjection = groupingSelect,
SqlTables = { sqlTable },
WhereCondition = whereCondition,
GroupByExpression = groupByExpression
}.GetSqlStatement();
var groupSource = SqlStatementModelObjectMother.CreateSqlTable (new ResolvedSubStatementTableInfo ("q0", groupingSubStatement));
var tableInfo = new UnresolvedGroupReferenceTableInfo (groupSource);
var expectedKeyViaElement = Expression.MakeMemberAccess (new SqlTableReferenceExpression (sqlTable), typeof (Cook).GetProperty ("Name"));
var expectedKeyViaGroupSource = Expression.MakeMemberAccess (new SqlTableReferenceExpression (groupSource), groupSource.ItemType.GetProperty ("Key"));
var expectedResultWhereCondition =
Expression.OrElse (
Expression.AndAlso (new SqlIsNullExpression (expectedKeyViaElement), new SqlIsNullExpression (expectedKeyViaGroupSource)),
Expression.AndAlso (
Expression.AndAlso (new SqlIsNotNullExpression (expectedKeyViaElement), new SqlIsNotNullExpression (expectedKeyViaGroupSource)),
Expression.Equal (expectedKeyViaElement, expectedKeyViaGroupSource)));
var fakeWhereCondition = Expression.Constant (false);
_stageMock
.Expect (mock => mock.ResolveWhereExpression (Arg<Expression>.Is.Anything, Arg.Is (_mappingResolutionContext)))
.WhenCalled (mi => SqlExpressionTreeComparer.CheckAreEqualTrees (expectedResultWhereCondition, (Expression) mi.Arguments[0]))
.Return (fakeWhereCondition);
_stageMock.Replay();
var result = ResolvingTableInfoVisitor.ResolveTableInfo (tableInfo, _resolverMock, _generator, _stageMock, _mappingResolutionContext);
_stageMock.VerifyAllExpectations();
Assert.That (result, Is.TypeOf (typeof (ResolvedJoinedGroupingTableInfo)));
var castResult = ((ResolvedJoinedGroupingTableInfo) result);
var resultGroupingSelector = castResult.AssociatedGroupingSelectExpression;
Assert.That (resultGroupingSelector, Is.SameAs (groupingSelect));
Assert.That (castResult.GroupSourceTableAlias, Is.EqualTo ("q0"));
var resultSqlStatement = castResult.SqlStatement;
Assert.That (resultSqlStatement.SqlTables, Is.EqualTo (groupingSubStatement.SqlTables));
Assert.That (resultSqlStatement.Orderings, Is.Empty);
Assert.That (resultSqlStatement.GroupByExpression, Is.Null);
SqlExpressionTreeComparer.CheckAreEqualTrees (
Expression.AndAlso (groupingSubStatement.WhereCondition, fakeWhereCondition),
resultSqlStatement.WhereCondition);
var expectedResultSelectProjection =
Expression.MakeMemberAccess (new SqlTableReferenceExpression (resultSqlStatement.SqlTables[0]), typeof (Cook).GetProperty ("ID"));
SqlExpressionTreeComparer.CheckAreEqualTrees (expectedResultSelectProjection, resultSqlStatement.SelectProjection);
Assert.That (resultSqlStatement.DataInfo, Is.TypeOf (typeof (StreamedSequenceInfo)));
Assert.That (resultSqlStatement.DataInfo.DataType, Is.SameAs (typeof (IQueryable<int>)));
var expectedItemExpression = resultSqlStatement.SelectProjection;
SqlExpressionTreeComparer.CheckAreEqualTrees (expectedItemExpression, ((StreamedSequenceInfo) resultSqlStatement.DataInfo).ItemExpression);
}
public void CheckSequenceItemType_DifferentTypes ()
{
var sequenceInfo = new StreamedSequenceInfo (typeof (string[]), Expression.Constant ("t"));
var expectedItemType = typeof (int);
Assert.That (
() => _resultOperator.CheckSequenceItemType (sequenceInfo, expectedItemType),
Throws.ArgumentException.With.Message.EqualTo (
"The input sequence must have items of type 'System.Int32', but it has items of type 'System.String'.\r\nParameter name: inputInfo"));
}
private void CheckOutputDataInfo (Type itemType, Type expectedOutputType)
{
var itemExpression = Expression.Constant (Activator.CreateInstance (itemType), itemType);
var inputInfo = new StreamedSequenceInfo (itemType.MakeArrayType(), itemExpression);
var outputInfo = _resultOperator.GetOutputDataInfo (inputInfo);
Assert.That (outputInfo, Is.InstanceOf (typeof (StreamedValueInfo)));
Assert.That (outputInfo.DataType, Is.SameAs (expectedOutputType));
}
public void GetOutputDataInfo_InvalidInputItemType ()
{
var input = new StreamedSequenceInfo (typeof (string[]), Expression.Constant (""));
_resultOperator.GetOutputDataInfo (input);
}
public void GetOutputDataInfo_WithDifferentAssignableSeedType ()
{
var itemExpression = Expression.Constant (0);
var input = new StreamedSequenceInfo (typeof (int[]), itemExpression);
var seed = Expression.Constant ("string");
var func = Expression.Lambda (
Expression.Constant (null, typeof (object)),
Expression.Parameter (typeof (object), "acc"));
var resultOperator = new AggregateFromSeedResultOperator (seed, func, null);
var result = resultOperator.GetOutputDataInfo (input);
Assert.That (result, Is.InstanceOf (typeof (StreamedScalarValueInfo)));
Assert.That (result.DataType, Is.SameAs (typeof (object)));
}
public void GetOutputDataInfo_WithoutResultSelector ()
{
var itemExpression = Expression.Constant (0);
var input = new StreamedSequenceInfo (typeof (int[]), itemExpression);
var result = _resultOperatorWithoutResultSelector.GetOutputDataInfo (input);
Assert.That (result, Is.InstanceOf (typeof (StreamedScalarValueInfo)));
Assert.That (result.DataType, Is.SameAs (typeof (int)));
}
private SqlStatement ConvertValueStatementToSequenceStatement ()
{
var newDataInfo = new StreamedSequenceInfo (typeof (IEnumerable<>).MakeGenericType (SqlStatement.DataInfo.DataType), SqlStatement.SelectProjection);
var adjustedStatementBuilder = new SqlStatementBuilder (SqlStatement) { DataInfo = newDataInfo };
if (SqlStatement.DataInfo is StreamedSingleValueInfo && SqlStatement.SqlTables.Count!=0)
{
// A sub-statement might use a different TopExpression than 1 (or none at all) in order to provoke a SQL error when more than one item is
// returned. When we convert the statement to a sequence statement, however, we must ensure that the exact "only 1 value is returned"
// semantics is ensured because we can't provoke a SQL error (but instead would return strange result sets).
adjustedStatementBuilder.TopExpression = new SqlLiteralExpression (1);
}
return adjustedStatementBuilder.GetSqlStatement();
}
public void CheckSequenceItemType_SameType ()
{
var sequenceInfo = new StreamedSequenceInfo (typeof (int[]), Expression.Constant (0));
var expectedItemType = typeof (int);
Assert.That (() => _resultOperator.CheckSequenceItemType (sequenceInfo, expectedItemType), Throws.Nothing);
}
public void CheckSequenceItemType_ExpectedAssignableFromSequenceItem ()
{
var sequenceInfo = new StreamedSequenceInfo (typeof (string[]), Expression.Constant ("t"));
var expectedItemType = typeof (object);
Assert.That (() => _resultOperator.CheckSequenceItemType (sequenceInfo, expectedItemType), Throws.Nothing);
}
public void CheckSequenceItemType_SequenceItemAssignableFromExpected ()
{
var sequenceInfo = new StreamedSequenceInfo (typeof (object[]), Expression.Constant (null, typeof (object)));
var expectedItemType = typeof (string);
Assert.That (
() => _resultOperator.CheckSequenceItemType (sequenceInfo, expectedItemType),
Throws.ArgumentException.With.Message.EqualTo (
"The input sequence must have items of type 'System.String', but it has items of type 'System.Object'.\r\nParameter name: inputInfo"));
}
protected StreamedSequenceInfo GetOutputDataInfo (StreamedSequenceInfo inputSequenceInfo)
{
ArgumentUtility.CheckNotNull ("inputSequenceInfo", inputSequenceInfo);
return new StreamedSequenceInfo (typeof (IQueryable<>).MakeGenericType (inputSequenceInfo.ResultItemType), inputSequenceInfo.ItemExpression);
}
public void GetOutputDataInfo_AssignableSource2 ()
{
var resultOperator = new ConcatResultOperator ("i", typeof (object), Expression.Constant (new[] { "string" }));
var cookExpression = Expression.Constant (null, typeof (Cook));
var input = new StreamedSequenceInfo (typeof (Cook[]), cookExpression);
var result = resultOperator.GetOutputDataInfo (input);
Assert.That (result, Is.InstanceOf (typeof (StreamedSequenceInfo)));
Assert.That (result.DataType, Is.SameAs (typeof (IQueryable<object>)));
}
public void UpdateDataInfo ()
{
var streamDataInfo = new StreamedSequenceInfo (typeof (Cook[]), Expression.Constant (new Cook()));
_handler.UpdateDataInfo (_resultOperator, _statementBuilder, streamDataInfo);
Assert.That (_statementBuilder.DataInfo, Is.TypeOf (typeof (StreamedSingleValueInfo)));
}
public void GetOutputDataInfo ()
{
var intExpression = Expression.Constant (0);
var input = new StreamedSequenceInfo (typeof (int[]), intExpression);
var result = _resultOperator.GetOutputDataInfo (input);
Assert.That (result, Is.InstanceOf (typeof (StreamedSequenceInfo)));
Assert.That (result.DataType, Is.SameAs (typeof (IQueryable<int>)));
Assert.That (((StreamedSequenceInfo) result).ItemExpression, Is.InstanceOf (typeof (QuerySourceReferenceExpression)));
Assert.That (
((QuerySourceReferenceExpression) ((StreamedSequenceInfo) result).ItemExpression).ReferencedQuerySource,
Is.SameAs (_resultOperator));
}
public void VisitSqlStatement_EverthingIsCopiedIfSelectionProjectionHasChanged ()
{
var selectProjection = Expression.Constant("select");
var whereCondition = Expression.Constant(true);
var topExpression = Expression.Constant("top");
var dataInfo = new StreamedSequenceInfo(typeof(Cook[]), Expression.Constant(new Cook()));
var builder = new SqlStatementBuilder ()
{
SelectProjection = selectProjection,
WhereCondition = whereCondition,
TopExpression = topExpression,
IsDistinctQuery = true,
DataInfo = dataInfo
};
var sqlTable = new SqlTable (new ResolvedSimpleTableInfo (typeof (Cook), "CookTable", "c"), JoinSemantics.Inner);
builder.SqlTables.Add (sqlTable);
var ordering = new Ordering (Expression.Constant ("order"),OrderingDirection.Asc);
builder.Orderings.Add (ordering);
var sqlStatement = builder.GetSqlStatement();
var fakeResult = Expression.Constant ("fake");
_stageMock
.Expect (mock => mock.ApplyContext (sqlStatement.SelectProjection, SqlExpressionContext.ValueRequired, _mappingResolutionContext))
.Return (fakeResult);
_stageMock.Replay ();
var result = SqlContextSelectionAdjuster.ApplyContext (sqlStatement, SqlExpressionContext.ValueRequired, _stageMock, _mappingResolutionContext);
_stageMock.VerifyAllExpectations();
Assert.That (result.SelectProjection, Is.SameAs (fakeResult));
Assert.That (result.DataInfo, Is.SameAs (dataInfo));
Assert.That (result.WhereCondition, Is.SameAs (whereCondition));
Assert.That (result.TopExpression, Is.SameAs (topExpression));
Assert.That (result.SqlTables[0], Is.SameAs (sqlTable));
Assert.That (result.Orderings[0], Is.SameAs (ordering));
Assert.That (result.IsDistinctQuery, Is.True);
}
public void GetOutputDataInfo_NonMatchingFunc ()
{
_resultOperatorWithResultSelector.Seed = Expression.Constant ("0");
var itemExpression = Expression.Constant (0);
var input = new StreamedSequenceInfo (typeof (int[]), itemExpression);
_resultOperatorWithResultSelector.GetOutputDataInfo (input);
}
public void MakeClosedGenericExecuteMethod_WithCovariantDataType ()
{
var info = new StreamedSequenceInfo (typeof (IEnumerable<object>), _stringExpression);
var executeMethod = typeof (CountResultOperator).GetMethod ("ExecuteInMemory", new[] { typeof (StreamedSequence) });
var result = info.MakeClosedGenericExecuteMethod (executeMethod);
Assert.That (result.GetGenericArguments (), Is.EqualTo (new[] { typeof (object) }));
}
public void GetOutputDataInfo_NonMatchingResultSelector ()
{
var resultSelector = Expression.Lambda (
typeof (Func<string, int>),
Expression.Constant (0),
Expression.Parameter (typeof (string), "i"));
_resultOperatorWithResultSelector.OptionalResultSelector = resultSelector;
var itemExpression = Expression.Constant (0);
var input = new StreamedSequenceInfo (typeof (int[]), itemExpression);
_resultOperatorWithResultSelector.GetOutputDataInfo (input);
}
public void RecalculateDataInfo (Expression previousSelectProjection)
{
if (SelectProjection.Type != previousSelectProjection.Type) // TODO: Consider removing this check and the parameter
{
var sequenceInfo = DataInfo as StreamedSequenceInfo;
if (sequenceInfo != null)
DataInfo = new StreamedSequenceInfo (typeof (IQueryable<>).MakeGenericType (SelectProjection.Type), SelectProjection);
var singleValueInfo = DataInfo as StreamedSingleValueInfo;
if (singleValueInfo != null)
DataInfo = new StreamedSingleValueInfo (SelectProjection.Type, singleValueInfo.ReturnDefaultWhenEmpty);
// For scalar queries, the DataInfo never needs to be recalculated.
}
}