protected override Expression VisitExtension(Expression extensionExpression)
{
switch (extensionExpression)
{
case EntityShaperExpression entityShaperExpression:
{
var key = GenerateKey((ProjectionBindingExpression)entityShaperExpression.ValueBufferExpression);
if (!_mapping.TryGetValue(key, out var accessor))
{
var entityParameter = Expression.Parameter(entityShaperExpression.Type);
_variables.Add(entityParameter);
_expressions.Add(Expression.Assign(entityParameter, entityShaperExpression));
if (_containsCollectionMaterialization)
{
_valuesArrayInitializers.Add(entityParameter);
accessor = Expression.Convert(
Expression.ArrayIndex(
_valuesArrayExpression,
Expression.Constant(_valuesArrayInitializers.Count - 1)),
entityShaperExpression.Type);
}
else
{
accessor = entityParameter;
}
_mapping[key] = accessor;
}
return(accessor);
}
case ProjectionBindingExpression projectionBindingExpression:
{
var key = GenerateKey(projectionBindingExpression);
if (!_mapping.TryGetValue(key, out var accessor))
{
var valueParameter = Expression.Parameter(projectionBindingExpression.Type);
_variables.Add(valueParameter);
_expressions.Add(Expression.Assign(valueParameter, projectionBindingExpression));
if (_containsCollectionMaterialization)
{
var expressionToAdd = (Expression)valueParameter;
if (expressionToAdd.Type.IsValueType)
{
expressionToAdd = Expression.Convert(expressionToAdd, typeof(object));
}
_valuesArrayInitializers.Add(expressionToAdd);
accessor = Expression.Convert(
Expression.ArrayIndex(
_valuesArrayExpression,
Expression.Constant(_valuesArrayInitializers.Count - 1)),
projectionBindingExpression.Type);
}
else
{
accessor = valueParameter;
}
_mapping[key] = accessor;
}
return(accessor);
}
case IncludeExpression includeExpression:
{
var entity = Visit(includeExpression.EntityExpression);
if (includeExpression.NavigationExpression is RelationalCollectionShaperExpression
relationalCollectionShaperExpression)
{
var innerShaper = new ShaperExpressionProcessingExpressionVisitor(
_selectExpression, _dataReaderParameter, _resultCoordinatorParameter, null)
.Inject(relationalCollectionShaperExpression.InnerShaper);
_collectionPopulatingExpressions.Add(new CollectionPopulatingExpression(
relationalCollectionShaperExpression.Update(
relationalCollectionShaperExpression.ParentIdentifier,
relationalCollectionShaperExpression.OuterIdentifier,
relationalCollectionShaperExpression.SelfIdentifier,
innerShaper),
includeExpression.Navigation.ClrType,
true));
_includeExpressions.Add(new CollectionInitializingExpression(
relationalCollectionShaperExpression.CollectionId,
entity,
relationalCollectionShaperExpression.ParentIdentifier,
relationalCollectionShaperExpression.OuterIdentifier,
includeExpression.Navigation,
includeExpression.Navigation.ClrType));
}
else
{
_includeExpressions.Add(includeExpression.Update(
entity,
Visit(includeExpression.NavigationExpression)));
}
return(entity);
}
case RelationalCollectionShaperExpression relationalCollectionShaperExpression2:
{
var key = GenerateKey(relationalCollectionShaperExpression2);
if (!_mapping.TryGetValue(key, out var accessor))
{
var innerShaper = new ShaperExpressionProcessingExpressionVisitor(
_selectExpression, _dataReaderParameter, _resultCoordinatorParameter, null)
.Inject(relationalCollectionShaperExpression2.InnerShaper);
_collectionPopulatingExpressions.Add(new CollectionPopulatingExpression(
relationalCollectionShaperExpression2.Update(
relationalCollectionShaperExpression2.ParentIdentifier,
relationalCollectionShaperExpression2.OuterIdentifier,
relationalCollectionShaperExpression2.SelfIdentifier,
innerShaper),
relationalCollectionShaperExpression2.Type,
false));
var collectionParameter = Expression.Parameter(relationalCollectionShaperExpression2.Type);
_variables.Add(collectionParameter);
_expressions.Add(Expression.Assign(
collectionParameter,
new CollectionInitializingExpression(
relationalCollectionShaperExpression2.CollectionId,
null,
relationalCollectionShaperExpression2.ParentIdentifier,
relationalCollectionShaperExpression2.OuterIdentifier,
relationalCollectionShaperExpression2.Navigation,
relationalCollectionShaperExpression2.Type)));
_valuesArrayInitializers.Add(collectionParameter);
accessor = Expression.Convert(
Expression.ArrayIndex(
_valuesArrayExpression,
Expression.Constant(_valuesArrayInitializers.Count - 1)),
relationalCollectionShaperExpression2.Type);
_mapping[key] = accessor;
}
return(accessor);
}
}
return(base.VisitExtension(extensionExpression));
}
