public void NestedNewExpression()
{
var outerAnonymousTypeCtor = typeof(AnonymousType <int, AnonymousType>).GetConstructor(new[] { typeof(int), typeof(AnonymousType) });
var outerAnonymousTypeAGetter = typeof(AnonymousType <int, AnonymousType>).GetMethod("get_a");
var outerAnonymousTypeBGetter = typeof(AnonymousType <int, AnonymousType>).GetMethod("get_b");
var outerAnonymousTypeBProperty = typeof(AnonymousType <int, AnonymousType>).GetProperty("b");
// new AnonymousType (get_a = 2, get_b = new AnonymousType (get_a = _searchedExpression, get_b = 1))
var innerExpression = Expression.New(
_anonymousTypeCtorWithArgs,
new[] { _searchedExpression, Expression.Constant(1) },
_anonymousTypeAGetter,
_anonymousTypeBGetter);
var fullExpression = Expression.New(
outerAnonymousTypeCtor,
new Expression[] { Expression.Constant(2), innerExpression },
outerAnonymousTypeAGetter,
outerAnonymousTypeBGetter);
var result = AccessorFindingExpressionTreeVisitor.FindAccessorLambda(_searchedExpression, fullExpression, _nestedInputParameter);
var inputParameter = Expression.Parameter(typeof(AnonymousType <int, AnonymousType>), "input");
var expectedResult = Expression.Lambda(
Expression.MakeMemberAccess(Expression.MakeMemberAccess(inputParameter, outerAnonymousTypeBProperty), _anonymousTypeAProperty),
inputParameter); // input => input.get_b().get_a()
ExpressionTreeComparer.CheckAreEqualTrees(expectedResult, result);
}
public void TrivialExpression()
{
var result = AccessorFindingExpressionTreeVisitor.FindAccessorLambda(_searchedExpression, _searchedExpression, _intInputParameter);
Expression <Func <int, int> > expectedResult = input => input;
ExpressionTreeComparer.CheckAreEqualTrees(expectedResult, result);
}
public void SearchedExpressionNotFound_AlthoughInOtherExpression()
{
var fullExpression = Expression.MemberInit(
Expression.New(_anonymousTypeCtorWithoutArgs),
Expression.Bind(_anonymousTypeAProperty, Expression.MakeBinary(ExpressionType.Add, _searchedExpression, _searchedExpression)),
Expression.Bind(_anonymousTypeBProperty, Expression.Constant(1)));
AccessorFindingExpressionTreeVisitor.FindAccessorLambda(_searchedExpression, fullExpression, _simpleInputParameter);
}
public void ConvertExpression()
{
var parameter = Expression.Parameter(typeof(long), "input");
var fullExpression = Expression.Convert(_searchedExpression, typeof(long));
var result = AccessorFindingExpressionTreeVisitor.FindAccessorLambda(_searchedExpression, fullExpression, parameter);
Expression <Func <long, int> > expectedResult = input => (int)input;
ExpressionTreeComparer.CheckAreEqualTrees(expectedResult, result);
}
public void TrivialExpression_WithEqualsTrue_ButNotReferenceEquals()
{
var searchedExpression1 = new QuerySourceReferenceExpression(ExpressionHelper.CreateMainFromClause <Cook>());
var searchedExpression2 = new QuerySourceReferenceExpression(searchedExpression1.ReferencedQuerySource);
var inputParameter = Expression.Parameter(typeof(Cook), "input");
var result = AccessorFindingExpressionTreeVisitor.FindAccessorLambda(searchedExpression1, searchedExpression2, inputParameter);
Expression <Func <Cook, Cook> > expectedResult = input => input;
ExpressionTreeComparer.CheckAreEqualTrees(expectedResult, result);
}
public void SearchedExpressionNotFound_AlthoughInOtherMemberBinding()
{
var anonymousTypeListProperty = typeof(AnonymousType).GetProperty("List");
var listAddMethod = typeof(List <int>).GetMethod("Add");
var fullExpression = Expression.MemberInit(
Expression.New(_anonymousTypeCtorWithoutArgs),
Expression.ListBind(anonymousTypeListProperty, Expression.ElementInit(listAddMethod, _searchedExpression)),
Expression.Bind(_anonymousTypeBProperty, Expression.Constant(1)));
AccessorFindingExpressionTreeVisitor.FindAccessorLambda(_searchedExpression, fullExpression, _simpleInputParameter);
}
public void SimpleMemberBindingExpression()
{
// new AnonymousType() { a = _searchedExpression, b = 1 }
var fullExpression = Expression.MemberInit(
Expression.New(_anonymousTypeCtorWithoutArgs),
Expression.Bind(_anonymousTypeAProperty, _searchedExpression),
Expression.Bind(_anonymousTypeBProperty, Expression.Constant(1)));
var result = AccessorFindingExpressionTreeVisitor.FindAccessorLambda(_searchedExpression, fullExpression, _simpleInputParameter);
Expression <Func <AnonymousType, int> > expectedResult = input => input.a;
ExpressionTreeComparer.CheckAreEqualTrees(expectedResult, result);
}
private static ICollection <Func <TResult, object> > GetEntityAccessors <TResult>(
IEnumerable <QuerySourceReferenceExpression> querySourceReferenceExpressions,
Expression selector)
{
return
((from qsre in querySourceReferenceExpressions
select
(Func <TResult, object>)
AccessorFindingExpressionTreeVisitor
.FindAccessorLambda(
qsre,
selector,
Expression.Parameter(typeof(TResult)))
.Compile()
)
.ToList());
}
public void SimpleNewExpression()
{
// new AnonymousType (get_a = _searchedExpression, get_b = 1)
var fullExpression = Expression.New(
_anonymousTypeCtorWithArgs,
new[] { _searchedExpression, Expression.Constant(1) },
_anonymousTypeAGetter,
_anonymousTypeBGetter);
var result = AccessorFindingExpressionTreeVisitor.FindAccessorLambda(_searchedExpression, fullExpression, _simpleInputParameter);
var inputParameter = Expression.Parameter(typeof(AnonymousType), "input");
var expectedResult = Expression.Lambda(
Expression.MakeMemberAccess(inputParameter, _anonymousTypeAProperty), inputParameter);
ExpressionTreeComparer.CheckAreEqualTrees(expectedResult, result);
}
private static ICollection <Func <TResult, object> > GetEntityAccessors <TResult>(
IEnumerable <EntityTrackingInfo> entityTrackingInfos,
Expression selector)
{
return
((from entityTrackingInfo in entityTrackingInfos
select
(Func <TResult, object>)
AccessorFindingExpressionTreeVisitor
.FindAccessorLambda(
entityTrackingInfo.QuerySourceReferenceExpression,
selector,
Expression.Parameter(typeof(TResult)))
.Compile()
)
.ToList());
}
public void NestedMemberBindingExpression()
{
var outerAnonymousTypeCtor = typeof(AnonymousType <int, AnonymousType>).GetConstructor(Type.EmptyTypes);
var outerAnonymousTypeAProperty = typeof(AnonymousType <int, AnonymousType>).GetProperty("a");
var outerAnonymousTypeBProperty = typeof(AnonymousType <int, AnonymousType>).GetProperty("b");
// new AnonymousType() { a = 2, b = new AnonymousType() { a = _searchedExpression, b = 1 } }
var innerExpression = Expression.MemberInit(
Expression.New(_anonymousTypeCtorWithoutArgs),
Expression.Bind(_anonymousTypeAProperty, _searchedExpression),
Expression.Bind(_anonymousTypeBProperty, Expression.Constant(1)));
var fullExpression = Expression.MemberInit(
Expression.New(outerAnonymousTypeCtor),
Expression.Bind(outerAnonymousTypeAProperty, Expression.Constant(2)),
Expression.Bind(outerAnonymousTypeBProperty, innerExpression));
var result = AccessorFindingExpressionTreeVisitor.FindAccessorLambda(_searchedExpression, fullExpression, _nestedInputParameter);
Expression <Func <AnonymousType <int, AnonymousType>, int> > expectedResult = input => input.b.a;
ExpressionTreeComparer.CheckAreEqualTrees(expectedResult, result);
}
protected virtual void IncludeNavigations(
[NotNull] QueryModel queryModel,
[NotNull] Type resultType)
{
Check.NotNull(queryModel, "queryModel");
Check.NotNull(resultType, "resultType");
var querySourceTracingExpressionTreeVisitor
= new QuerySourceTracingExpressionTreeVisitor();
foreach (var include
in from queryAnnotation in _queryAnnotations
let includeResultOperator = queryAnnotation.ResultOperator as IncludeResultOperator
where includeResultOperator != null
let navigationPath
= BindNavigationPathMemberExpression(
(MemberExpression)includeResultOperator.NavigationPropertyPath,
(ns, _) => BindChainedNavigations(ns, includeResultOperator.ChainedNavigationProperties).ToArray())
orderby navigationPath != null &&
navigationPath.First().PointsToPrincipal
select new
{
navigationPath,
queryAnnotation.QuerySource,
includeResultOperator.NavigationPropertyPath
})
{
if (include.navigationPath != null)
{
var resultQuerySourceReferenceExpression
= querySourceTracingExpressionTreeVisitor
.FindResultQuerySourceReferenceExpression(
queryModel.SelectClause.Selector,
include.QuerySource);
if (resultQuerySourceReferenceExpression != null)
{
var accessorLambda
= AccessorFindingExpressionTreeVisitor
.FindAccessorLambda(
resultQuerySourceReferenceExpression,
queryModel.SelectClause.Selector,
Expression.Parameter(queryModel.SelectClause.Selector.Type));
QueryCompilationContext.Logger
.WriteInformation(
include.navigationPath.Join("."),
Strings.LogIncludingNavigation);
IncludeNavigations(
include.QuerySource,
resultType,
accessorLambda,
include.navigationPath);
}
}
else
{
throw new InvalidOperationException(
Strings.IncludeNonBindableExpression(include.NavigationPropertyPath));
}
}
}
public void SearchedExpressionNotFound_AlthoughInUnaryPlusExpression()
{
var fullExpression = Expression.UnaryPlus(_searchedExpression);
AccessorFindingExpressionTreeVisitor.FindAccessorLambda(_searchedExpression, fullExpression, _intInputParameter);
}
public void SearchedExpressionNotFound_AlthoughInNewExpressionWithoutMember()
{
var fullExpression = Expression.New(_anonymousTypeCtorWithArgs, _searchedExpression, _searchedExpression);
AccessorFindingExpressionTreeVisitor.FindAccessorLambda(_searchedExpression, fullExpression, _simpleInputParameter);
}
protected virtual void IncludeNavigations([NotNull] QueryModel queryModel)
{
Check.NotNull(queryModel, nameof(queryModel));
var includeSpecifications
= QueryCompilationContext.QueryAnnotations
.OfType <IncludeQueryAnnotation>()
.Select(annotation =>
{
var navigationPath
= BindNavigationPathMemberExpression(
(MemberExpression)annotation.NavigationPropertyPath,
(ns, _) => BindChainedNavigations(ns, annotation.ChainedNavigationProperties).ToArray());
if (navigationPath == null)
{
throw new InvalidOperationException(
Strings.IncludeNonBindableExpression(annotation.NavigationPropertyPath));
}
return(new IncludeSpecification(annotation.QuerySource, navigationPath));
})
.ToList();
var querySourceTracingExpressionTreeVisitor
= new QuerySourceTracingExpressionTreeVisitor();
foreach (var includeSpecification in includeSpecifications
.OrderBy(a => a.NavigationPath.First().PointsToPrincipal()))
{
var resultQuerySourceReferenceExpression
= querySourceTracingExpressionTreeVisitor
.FindResultQuerySourceReferenceExpression(
queryModel.SelectClause.Selector,
includeSpecification.QuerySource);
if (resultQuerySourceReferenceExpression != null)
{
var accessorLambda
= AccessorFindingExpressionTreeVisitor
.FindAccessorLambda(
resultQuerySourceReferenceExpression,
queryModel.SelectClause.Selector,
Expression.Parameter(queryModel.SelectClause.Selector.Type));
QueryCompilationContext.Logger
.LogInformation(
includeSpecification.NavigationPath.Join("."),
Strings.LogIncludingNavigation);
IncludeNavigations(
includeSpecification.QuerySource,
_expression.Type.GetSequenceType(),
accessorLambda,
includeSpecification.NavigationPath,
QuerySourceRequiresTracking(includeSpecification.QuerySource));
QueryCompilationContext
.AddTrackableInclude(
resultQuerySourceReferenceExpression.ReferencedQuerySource,
includeSpecification.NavigationPath);
}
}
}
protected virtual void IncludeNavigations(
[NotNull] QueryModel queryModel,
[NotNull] Type resultType,
[NotNull] ICollection <QueryAnnotation> queryAnnotations)
{
Check.NotNull(queryModel, "queryModel");
Check.NotNull(resultType, "resultType");
Check.NotNull(queryAnnotations, "queryAnnotations");
var querySourceTracingExpressionTreeVisitor
= new QuerySourceTracingExpressionTreeVisitor();
foreach (var queryAnnotation in queryAnnotations)
{
var includeResultOperator
= queryAnnotation.ResultOperator as IncludeResultOperator;
if (includeResultOperator != null)
{
var navigation
= BindNavigationMemberExpression(
(MemberExpression)includeResultOperator.NavigationPropertyPath,
(n, _) => n);
if (navigation != null)
{
var resultQuerySourceReferenceExpression
= querySourceTracingExpressionTreeVisitor
.FindResultQuerySourceReferenceExpression(
queryModel.SelectClause.Selector,
queryAnnotation.QuerySource);
if (resultQuerySourceReferenceExpression != null)
{
var accessorLambda
= AccessorFindingExpressionTreeVisitor
.FindAccessorLambda(
resultQuerySourceReferenceExpression,
queryModel.SelectClause.Selector,
Expression.Parameter(queryModel.SelectClause.Selector.Type));
QueryCompilationContext.Logger
.WriteInformation(
navigation,
Strings.FormatLogIncludingNavigation);
IncludeNavigation(
queryAnnotation.QuerySource,
resultType,
accessorLambda,
navigation);
}
}
else
{
throw new NotImplementedException(
Strings.FormatIncludeNonBindableExpression(includeResultOperator.NavigationPropertyPath));
}
}
}
}
