public override Expression Visit(Expression expression)
{
if (expression == null)
{
return(null);
}
if (!(expression is NewExpression ||
expression is MemberInitExpression ||
expression is EntityShaperExpression ||
expression is IncludeExpression))
{
// This skips the group parameter from GroupJoin
if (expression is ParameterExpression parameter &&
parameter.Type.IsGenericType &&
parameter.Type.GetGenericTypeDefinition() == typeof(IEnumerable <>))
{
return(parameter);
}
if (_clientEval)
{
switch (expression)
{
case ConstantExpression _:
return(expression);
case MaterializeCollectionNavigationExpression materializeCollectionNavigationExpression:
//return _selectExpression.AddCollectionProjection(
// _queryableMethodTranslatingExpressionVisitor.TranslateSubquery(
// materializeCollectionNavigationExpression.Subquery),
// materializeCollectionNavigationExpression.Navigation, null);
throw new NotImplementedException();
case MethodCallExpression methodCallExpression:
{
if (methodCallExpression.Method.IsGenericMethod &&
methodCallExpression.Method.DeclaringType == typeof(Enumerable) &&
methodCallExpression.Method.Name == nameof(Enumerable.ToList))
{
//var elementType = methodCallExpression.Method.GetGenericArguments()[0];
//var result = _queryableMethodTranslatingExpressionVisitor.TranslateSubquery(methodCallExpression.Arguments[0]);
//return _selectExpression.AddCollectionProjection(result, null, elementType);
throw new NotImplementedException();
}
var subquery = _queryableMethodTranslatingExpressionVisitor.TranslateSubquery(methodCallExpression);
if (subquery != null)
{
//if (subquery.ResultType == ResultType.Enumerable)
//{
// return _selectExpression.AddCollectionProjection(subquery, null, subquery.ShaperExpression.Type);
//}
throw new NotImplementedException();
}
break;
}
}
var translation = _expressionTranslatingExpressionVisitor.Translate(expression);
return(translation == null
? base.Visit(expression)
: new ProjectionBindingExpression(_queryExpression, _queryExpression.AddToProjection(translation), expression.Type));
}
else
{
var translation = _expressionTranslatingExpressionVisitor.Translate(expression);
if (translation == null)
{
return(null);
}
_projectionMapping[_projectionMembers.Peek()] = translation;
return(new ProjectionBindingExpression(_queryExpression, _projectionMembers.Peek(), expression.Type));
}
}
return(base.Visit(expression));
}
