public MethodCallExpression Build(IEdmModel edmModel, Expression outerSource, Expression innerSource,
IReadOnlyList <IEdmNavigationProperty> joinPath, IEdmNavigationProperty navigationProperty)
{
if (navigationProperty.ContainsTarget)
{
ModelBuilder.ManyToManyJoinDescription joinDescription = edmModel.GetManyToManyJoinDescription(navigationProperty);
IEdmEntitySet joinEntitySet = OeEdmClrHelper.GetEntitySet(edmModel, joinDescription.JoinNavigationProperty);
Expression joinSource = OeEnumerableStub.CreateEnumerableStubExpression(joinDescription.JoinClassType, joinEntitySet);
outerSource = Build(outerSource, joinSource, joinPath, joinDescription.JoinNavigationProperty, false);
AddJoinPath(joinPath, joinDescription.JoinNavigationProperty);
var fixedJoinPath = new IEdmNavigationProperty[joinPath.Count + 1];
for (int i = 0; i < joinPath.Count; i++)
{
fixedJoinPath[i] = joinPath[i];
}
fixedJoinPath[fixedJoinPath.Length - 1] = joinDescription.JoinNavigationProperty;
outerSource = Build(outerSource, innerSource, fixedJoinPath, joinDescription.TargetNavigationProperty, true);
_joinPaths.RemoveAt(_joinPaths.Count - 1);
}
else
{
outerSource = Build(outerSource, innerSource, joinPath, navigationProperty, false);
}
AddJoinPath(joinPath, navigationProperty);
return((MethodCallExpression)outerSource);
}
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 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 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));
}
