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);
}
}
private Expression GetInnerSource(OeSelectItem navigationItem, ExpandedNavigationSelectItem item)
{
Type clrEntityType = _visitor.EdmModel.GetClrType(navigationItem.EdmProperty.DeclaringType);
PropertyInfo navigationClrProperty = OeEdmClrHelper.GetPropertyIgnoreCase(clrEntityType, navigationItem.EdmProperty);
Type itemType = OeExpressionHelper.GetCollectionItemType(navigationClrProperty.PropertyType);
if (itemType == null)
{
itemType = navigationClrProperty.PropertyType;
}
var visitor = new OeQueryNodeVisitor(_visitor, Expression.Parameter(itemType));
var expressionBuilder = new OeExpressionBuilder(_joinBuilder, visitor);
Expression innerSource = Expression.Constant(null, typeof(IEnumerable <>).MakeGenericType(itemType));
innerSource = expressionBuilder.ApplyFilter(innerSource, item.FilterOption);
if (item.SkipOption != null || item.TopOption != null)
{
Expression source = Expression.Constant(null, typeof(IEnumerable <>).MakeGenericType(navigationClrProperty.DeclaringType));
innerSource = OeCrossApplyBuilder.Build(source, innerSource, item, navigationItem.Path, expressionBuilder);
}
return(innerSource);
}
private Expression GetInnerSource(OeSelectItem navigationItem, ExpandedNavigationSelectItem item)
{
Type clrEntityType = _visitor.EdmModel.GetClrType(navigationItem.EdmProperty.DeclaringType);
PropertyInfo navigationClrProperty = clrEntityType.GetPropertyIgnoreCase(navigationItem.EdmProperty);
Type itemType = OeExpressionHelper.GetCollectionItemType(navigationClrProperty.PropertyType);
if (itemType == null)
{
itemType = navigationClrProperty.PropertyType;
}
var visitor = new OeQueryNodeVisitor(_visitor, Expression.Parameter(itemType));
var expressionBuilder = new OeExpressionBuilder(_joinBuilder, visitor);
var navigationEdmProperty = (IEdmNavigationProperty)navigationItem.EdmProperty;
if (navigationEdmProperty.ContainsTarget)
{
ModelBuilder.ManyToManyJoinDescription joinDescription = _visitor.EdmModel.GetManyToManyJoinDescription(navigationEdmProperty);
navigationEdmProperty = joinDescription.TargetNavigationProperty;
}
IEdmEntitySet innerEntitySet = OeEdmClrHelper.GetEntitySet(_visitor.EdmModel, navigationEdmProperty);
Expression innerSource = OeEnumerableStub.CreateEnumerableStubExpression(itemType, innerEntitySet);
innerSource = expressionBuilder.ApplyFilter(innerSource, item.FilterOption);
if (item.SkipOption != null || item.TopOption != null)
{
Expression source = OeEnumerableStub.CreateEnumerableStubExpression(navigationClrProperty.DeclaringType, (IEdmEntitySet)_navigationItem.EntitySet);
innerSource = OeCrossApplyBuilder.Build(source, innerSource, item, navigationItem.Path, expressionBuilder);
}
return(innerSource);
}
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));
}
private Expression GetInnerSource(OeNavigationSelectItem navigationItem)
{
if (navigationItem.Parent == null)
{
throw new InvalidOperationException("Inner source cannot exist for root item");
}
Type clrEntityType = _edmModel.GetClrType(navigationItem.EdmProperty.DeclaringType);
PropertyInfo navigationClrProperty = clrEntityType.GetPropertyIgnoreCase(navigationItem.EdmProperty);
Type itemType = OeExpressionHelper.GetCollectionItemTypeOrNull(navigationClrProperty.PropertyType) ?? navigationClrProperty.PropertyType;
var visitor = new OeQueryNodeVisitor(_joinBuilder.Visitor, Expression.Parameter(itemType));
var expressionBuilder = new OeExpressionBuilder(_joinBuilder, visitor);
IEdmNavigationProperty navigationProperty = navigationItem.EdmProperty;
if (navigationItem.EdmProperty.ContainsTarget)
{
ModelBuilder.ManyToManyJoinDescription joinDescription = _edmModel.GetManyToManyJoinDescription(navigationProperty);
navigationProperty = joinDescription.TargetNavigationProperty;
}
IEdmEntitySet innerEntitySet = OeEdmClrHelper.GetEntitySet(_edmModel, navigationProperty);
Expression innerSource = OeEnumerableStub.CreateEnumerableStubExpression(itemType, innerEntitySet);
ExpandedNavigationSelectItem item = navigationItem.NavigationSelectItem;
innerSource = expressionBuilder.ApplyFilter(innerSource, item.FilterOption);
long?top = GetTop(navigationItem, item.TopOption);
if (top == null && item.SkipOption == null)
{
return(innerSource);
}
OrderByClause orderByClause = item.OrderByOption;
if (navigationItem.PageSize > 0)
{
orderByClause = OeSkipTokenParser.GetUniqueOrderBy(navigationItem.EntitySet, item.OrderByOption, null);
}
var entitySet = (IEdmEntitySet)navigationItem.Parent.EntitySet;
Expression source = OeEnumerableStub.CreateEnumerableStubExpression(navigationClrProperty.DeclaringType, entitySet);
var crossApplyBuilder = new OeCrossApplyBuilder(_edmModel, expressionBuilder);
return(crossApplyBuilder.Build(source, innerSource, navigationItem.Path, orderByClause, item.SkipOption, top));
}
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));
public OeCrossApplyBuilder(IEdmModel edmModel, OeExpressionBuilder expressionBuilder)
{
_edmModel = edmModel;
_expressionBuilder = expressionBuilder;
}
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)));
}
