protected override ConstantExpression VisitConstant(ConstantExpression expression)
{
var queryable = AsQueryableOrNull(expression.Value);
if (!(queryable is null))
{
var typeInfo = _typeInfoProvider.Get(queryable.ElementType);
var queryableResourceDescriptor = new QueryableResourceDescriptor(typeInfo);
return(new ConstantExpression(queryableResourceDescriptor));
}
var constantQueryArgument = expression.Value as ConstantQueryArgument;
if (!(constantQueryArgument is null))
{
var newConstantQueryArgument = new ConstantQueryArgument(constantQueryArgument);
var properties = newConstantQueryArgument.Properties ?? Enumerable.Empty <Property>();
foreach (var property in properties)
{
var value = AsQueryableOrNull(property.Value);
if (!(value is null))
{
var typeInfo = _typeInfoProvider.Get(value.ElementType);
var queryableResourceDescriptor = new QueryableResourceDescriptor(typeInfo);
property.Value = queryableResourceDescriptor;
}
}
return(new ConstantExpression(newConstantQueryArgument, expression.Type));
}
return(base.VisitConstant(expression));
}
public virtual TypeInfo Get(Type type, bool?includePropertyInfosOverride = null, bool?setMemberDeclaringTypesOverride = null)
{
if (type is null)
{
return(null);
}
if (_referenceTracker.TryGetValue(type, out TypeInfo typeInfo))
{
return(typeInfo);
}
if (!(_parent is null))
{
return(_parent.Get(type, includePropertyInfosOverride, setMemberDeclaringTypesOverride));
}
var context = this;
if ((includePropertyInfosOverride.HasValue && includePropertyInfosOverride != IncludePropertyInfos) ||
(setMemberDeclaringTypesOverride.HasValue && setMemberDeclaringTypesOverride != SetMemberDeclaringTypes))
{
context = new TypeInfoProvider(
includePropertyInfosOverride ?? IncludePropertyInfos,
setMemberDeclaringTypesOverride ?? SetMemberDeclaringTypes,
this);
}
return(new TypeInfo(type, context));
}
public static TypeInfo GetTypeInfo(this ITypeInfoProvider typeInfoProvider, Type type) => typeInfoProvider?.Get(type);