public override OeSelectItem Translate(ExpandedNavigationSelectItem item)
{
if (_navigationNextLink && Cache.UriCompare.OeComparerExtension.GetNavigationNextLink(item))
{
return(null);
}
Type itemType;
IEdmNavigationProperty navigationProperty = (((NavigationPropertySegment)item.PathToNavigationProperty.LastSegment).NavigationProperty);
OeSelectItem navigationItem = _navigationItem.FindChildrenNavigationItem(navigationProperty);
if (navigationItem == null)
{
navigationItem = new OeSelectItem(_navigationItem, item, _skipToken);
_navigationItem.AddNavigationItem(navigationItem);
Expression innerSource = GetInnerSource(navigationItem, item);
_source = _joinBuilder.Build(_source, innerSource, _navigationItem.GetJoinPath(), navigationProperty);
itemType = OeExpressionHelper.GetCollectionItemType(innerSource.Type);
}
else
{
itemType = _visitor.EdmModel.GetClrType(navigationItem.EntitySet.EntityType());
}
var selectTranslator = new OeSelectTranslator(_joinBuilder, navigationItem);
_source = selectTranslator.BuildSelect(item.SelectAndExpand, _source, _navigationNextLink, _skipToken);
return(navigationItem);
}
public Expression ApplySelect(Expression source, OeQueryContext queryContext)
{
if (queryContext.ODataUri.Path.LastSegment is CountSegment)
{
return(source);
}
var selectTranslator = new Translators.OeSelectTranslator(_joinBuilder, queryContext.ODataUri.Path, queryContext.MetadataLevel);
source = selectTranslator.Build(source, queryContext);
_entryFactoryFactory = selectTranslator.CreateEntryFactory;
ChangeParameterType(source);
return(source);
}
public Expression ApplySelect(Expression source, OeQueryContext queryContext)
{
if (queryContext.ODataUri.Path.LastSegment is CountSegment)
{
return(source);
}
var selectTranslator = new Translators.OeSelectTranslator(queryContext.EdmModel, _joinBuilder, queryContext.ODataUri);
var selectTranslatorParameters = new Translators.OeSelectTranslatorParameters()
{
IsDatabaseNullHighestValue = queryContext.IsDatabaseNullHighestValue,
MetadataLevel = queryContext.MetadataLevel,
SkipTokenNameValues = queryContext.SkipTokenNameValues
};
source = selectTranslator.Build(source, ref selectTranslatorParameters, out _entryFactoryFactory);
ChangeParameterType(source);
return(source);
}
public override OeEntryFactory CreateEntryFactory(IEdmEntitySet entitySet, Type clrType, OePropertyAccessor[]?skipTokenAccessors)
{
ParameterExpression parameter = Expression.Parameter(typeof(Object));
UnaryExpression typedParameter = Expression.Convert(parameter, clrType);
if (_rootNavigationItem.HasNavigationItems())
{
List <OeNavigationSelectItem> navigationItems = OeSelectTranslator.FlattenNavigationItems(_rootNavigationItem, true);
IReadOnlyList <MemberExpression> navigationProperties = OeExpressionHelper.GetPropertyExpressions(typedParameter);
int propertyIndex = navigationProperties.Count - 1;
for (int i = navigationItems.Count - 1; i >= 0; i--)
{
OeNavigationSelectItem navigationItem = navigationItems[i];
if (navigationItem.Kind == OeNavigationSelectItemKind.NotSelected)
{
propertyIndex--;
continue;
}
OePropertyAccessor[] accessors = Array.Empty <OePropertyAccessor>();
LambdaExpression? linkAccessor = null;
OeNavigationEntryFactory[] nestedNavigationLinks = Array.Empty <OeNavigationEntryFactory>();
if (navigationItem.Kind != OeNavigationSelectItemKind.NextLink)
{
accessors = GetAccessors(navigationProperties[propertyIndex].Type, navigationItem);
linkAccessor = Expression.Lambda(navigationProperties[propertyIndex], parameter);
nestedNavigationLinks = GetNestedNavigationLinks(navigationItem);
propertyIndex--;
}
if (i == 0)
{
navigationItem.EntryFactory = new OeEntryFactory(navigationItem.EntitySet, accessors, skipTokenAccessors, nestedNavigationLinks, linkAccessor);
}
else
{
navigationItem.EntryFactory = new OeNavigationEntryFactory(
navigationItem.EntitySet,
accessors,
skipTokenAccessors,
nestedNavigationLinks,
linkAccessor,
navigationItem.EdmProperty,
navigationItem.NavigationSelectItem,
navigationItem.Kind == OeNavigationSelectItemKind.NextLink);
}
}
}
else
{
var navigationLinks = new OeNavigationEntryFactory[_rootNavigationItem.NavigationItems.Count];
for (int i = 0; i < _rootNavigationItem.NavigationItems.Count; i++)
{
OeNavigationSelectItem navigationItem = _rootNavigationItem.NavigationItems[i];
navigationLinks[i] = new OeNavigationEntryFactory(
navigationItem.EntitySet,
Array.Empty <OePropertyAccessor>(),
null,
Array.Empty <OeNavigationEntryFactory>(),
null,
navigationItem.EdmProperty,
navigationItem.NavigationSelectItem,
navigationItem.Kind == OeNavigationSelectItemKind.NextLink);
}
OePropertyAccessor[] accessors = GetAccessors(clrType, _rootNavigationItem);
_rootNavigationItem.EntryFactory = new OeEntryFactory(_rootNavigationItem.EntitySet, accessors, skipTokenAccessors, navigationLinks);
}
return(_rootNavigationItem.EntryFactory);
}
