private Expression BuildSkipTakeSource(Expression source, OeSkipTokenNameValue[] skipTokenNameValues, bool isDatabaseNullHighestValue)
{
BuildOrderBySkipTake(_rootNavigationItem, _odataUri.OrderBy, HasSelectItems(_odataUri.SelectAndExpand));
source = BuildJoin(source, new OeNavigationSelectItem[] { _rootNavigationItem });
long?top = GetTop(_rootNavigationItem, _odataUri.Top);
if (top == null && _odataUri.Skip == null)
{
return(source);
}
var expressionBuilder = new OeExpressionBuilder(_joinBuilder);
source = expressionBuilder.ApplySkipToken(source, skipTokenNameValues, _odataUri.OrderBy, isDatabaseNullHighestValue);
source = expressionBuilder.ApplyOrderBy(source, _odataUri.OrderBy);
source = expressionBuilder.ApplySkip(source, _odataUri.Skip, _odataUri.Path);
return(expressionBuilder.ApplyTake(source, top, _odataUri.Path));
bool HasSelectItems(SelectExpandClause selectExpandClause)
{
if (selectExpandClause != null)
{
foreach (SelectItem odataSelectItem in selectExpandClause.SelectedItems)
{
if (odataSelectItem is PathSelectItem pathSelectItem && pathSelectItem.SelectedPath.LastSegment is PropertySegment)
{
return(true);
}
}
}
return(false);
}
}
public MethodCallExpression Build(Expression outer, Expression inner, ODataPath odataPath, OrderByClause orderBy, long?skip, long?top)
{
var segment = (NavigationPropertySegment)odataPath.LastSegment;
IEdmNavigationProperty navigationProperty = segment.NavigationProperty;
if (navigationProperty.ContainsTarget)
{
ModelBuilder.ManyToManyJoinDescription joinDescription = _edmModel.GetManyToManyJoinDescription(navigationProperty);
IEdmEntitySet joinEntitySet = OeEdmClrHelper.GetEntitySet(_edmModel, joinDescription.JoinNavigationProperty);
outer = OeEnumerableStub.CreateEnumerableStubExpression(joinDescription.JoinClassType, joinEntitySet);
navigationProperty = joinDescription.TargetNavigationProperty;
}
Type outerType = OeExpressionHelper.GetCollectionItemType(outer.Type);
ParameterExpression outerParameter = Expression.Parameter(outerType, outerType.Name);
inner = new ReplaceParameterVisitor(outerParameter).Visit(inner); //replace $it
Expression subquery = CreateWhereExpression(outerParameter, inner, navigationProperty);
subquery = _expressionBuilder.ApplyOrderBy(subquery, orderBy);
subquery = _expressionBuilder.ApplySkip(subquery, skip, odataPath);
subquery = _expressionBuilder.ApplyTake(subquery, top, odataPath);
Type innerType = OeExpressionHelper.GetCollectionItemType(inner.Type);
MethodInfo selectManyMethdoInfo = OeMethodInfoHelper.GetSelectManyMethodInfo(outerType, innerType);
return(Expression.Call(selectManyMethdoInfo, outer, Expression.Lambda(subquery, outerParameter)));
}
private static Expression BuildSkipTakeSource(Expression source, OeQueryContext queryContext, OeSelectItem navigationItem)
{
bool hasSelectItems = HasSelectItems(queryContext.ODataUri.SelectAndExpand);
source = BuildOrderBySkipToken(navigationItem, queryContext.ODataUri.OrderBy, source, queryContext.JoinBuilder, hasSelectItems);
queryContext.JoinBuilder.Visitor.ChangeParameterType(source);
var expressionBuilder = new OeExpressionBuilder(queryContext.JoinBuilder);
source = expressionBuilder.ApplySkipToken(source, queryContext.SkipTokenNameValues, queryContext.ODataUri.OrderBy, queryContext.IsDatabaseNullHighestValue);
source = expressionBuilder.ApplyOrderBy(source, queryContext.ODataUri.OrderBy);
source = expressionBuilder.ApplySkip(source, queryContext.ODataUri.Skip, queryContext.ODataUri.Path);
return(expressionBuilder.ApplyTake(source, queryContext.ODataUri.Top, queryContext.ODataUri.Path));
}
public static MethodCallExpression Build(Expression outer, Expression inner, ExpandedNavigationSelectItem item, ODataPath odataPath, OeExpressionBuilder expressionBuilder)
{
var segment = (NavigationPropertySegment)item.PathToNavigationProperty.LastSegment;
Type outerType = OeExpressionHelper.GetCollectionItemType(outer.Type);
var outerParameter = Expression.Parameter(outerType, outerType.Name);
Expression subquery = CreateWhereExpression(outerParameter, inner, segment.NavigationProperty);
subquery = expressionBuilder.ApplyOrderBy(subquery, item.OrderByOption);
subquery = expressionBuilder.ApplySkip(subquery, item.SkipOption, odataPath);
subquery = expressionBuilder.ApplyTake(subquery, item.TopOption, odataPath);
Type innerType = OeExpressionHelper.GetCollectionItemType(inner.Type);
MethodInfo selectManyMethdoInfo = OeMethodInfoHelper.GetSelectManyMethodInfo(outerType, innerType);
return(Expression.Call(selectManyMethdoInfo, outer, Expression.Lambda(subquery, outerParameter)));
}
private Expression BuildSkipTakeSource(Expression source, OeSkipTokenNameValue[] skipTokenNameValues, bool isDatabaseNullHighestValue)
{
BuildOrderBySkipTake(_rootNavigationItem, _odataUri.OrderBy, HasSelectItems(_odataUri.SelectAndExpand));
source = BuildJoin(source, new OeNavigationSelectItem[] { _rootNavigationItem });
long?top = GetTop(_rootNavigationItem, _odataUri.Top);
if (top == null && _odataUri.Skip == null)
{
return(source);
}
var expressionBuilder = new OeExpressionBuilder(_joinBuilder);
source = expressionBuilder.ApplySkipToken(source, skipTokenNameValues, _odataUri.OrderBy, isDatabaseNullHighestValue);
source = expressionBuilder.ApplyOrderBy(source, _odataUri.OrderBy);
source = expressionBuilder.ApplySkip(source, _odataUri.Skip, _odataUri.Path);
return(expressionBuilder.ApplyTake(source, top, _odataUri.Path));