private Expression BuildPropertyContainer(IEdmEntityType elementType, Expression source,
Dictionary <IEdmNavigationProperty, ExpandedNavigationSelectItem> propertiesToExpand,
ISet <IEdmStructuralProperty> propertiesToInclude, ISet <IEdmStructuralProperty> autoSelectedProperties, bool isSelectingOpenTypeSegments)
{
IList <NamedPropertyExpression> includedProperties = new List <NamedPropertyExpression>();
foreach (KeyValuePair <IEdmNavigationProperty, ExpandedNavigationSelectItem> kvp in propertiesToExpand)
{
IEdmNavigationProperty propertyToExpand = kvp.Key;
ExpandedNavigationSelectItem expandItem = kvp.Value;
SelectExpandClause projection = expandItem.SelectAndExpand;
ModelBoundQuerySettings querySettings = EdmLibHelpers.GetModelBoundQuerySettings(propertyToExpand,
propertyToExpand.ToEntityType(),
_context.Model);
Expression propertyName = CreatePropertyNameExpression(elementType, propertyToExpand, source);
Expression propertyValue = CreatePropertyValueExpressionWithFilter(elementType, propertyToExpand, source,
expandItem.FilterOption);
Expression nullCheck = GetNullCheckExpression(propertyToExpand, propertyValue, projection);
Expression countExpression = CreateTotalCountExpression(propertyValue, expandItem);
// projection can be null if the expanded navigation property is not further projected or expanded.
if (projection != null)
{
int?modelBoundPageSize = querySettings == null ? null : querySettings.PageSize;
propertyValue = ProjectAsWrapper(propertyValue, projection, propertyToExpand.ToEntityType(), expandItem.NavigationSource, expandItem, modelBoundPageSize);
}
NamedPropertyExpression propertyExpression = new NamedPropertyExpression(propertyName, propertyValue);
if (projection != null)
{
if (!propertyToExpand.Type.IsCollection())
{
propertyExpression.NullCheck = nullCheck;
}
else if (_settings.PageSize.HasValue)
{
propertyExpression.PageSize = _settings.PageSize.Value;
}
else
{
if (querySettings != null && querySettings.PageSize.HasValue)
{
propertyExpression.PageSize = querySettings.PageSize.Value;
}
}
propertyExpression.TotalCount = countExpression;
propertyExpression.CountOption = expandItem.CountOption;
}
includedProperties.Add(propertyExpression);
}
foreach (IEdmStructuralProperty propertyToInclude in propertiesToInclude)
{
Expression propertyName = CreatePropertyNameExpression(elementType, propertyToInclude, source);
Expression propertyValue = CreatePropertyValueExpression(elementType, propertyToInclude, source);
includedProperties.Add(new NamedPropertyExpression(propertyName, propertyValue));
}
foreach (IEdmStructuralProperty propertyToInclude in autoSelectedProperties)
{
Expression propertyName = CreatePropertyNameExpression(elementType, propertyToInclude, source);
Expression propertyValue = CreatePropertyValueExpression(elementType, propertyToInclude, source);
includedProperties.Add(new NamedPropertyExpression(propertyName, propertyValue)
{
AutoSelected = true
});
}
if (isSelectingOpenTypeSegments)
{
var dynamicPropertyDictionary = EdmLibHelpers.GetDynamicPropertyDictionary(elementType, _model);
Expression propertyName = Expression.Constant(dynamicPropertyDictionary.Name);
Expression propertyValue = Expression.Property(source, dynamicPropertyDictionary.Name);
Expression nullablePropertyValue = ExpressionHelpers.ToNullable(propertyValue);
if (_settings.HandleNullPropagation == HandleNullPropagationOption.True)
{
// source == null ? null : propertyValue
propertyValue = Expression.Condition(
test: Expression.Equal(source, Expression.Constant(value: null)),
ifTrue: Expression.Constant(value: null, type: propertyValue.Type.ToNullable()),
ifFalse: nullablePropertyValue);
}
else
{
propertyValue = nullablePropertyValue;
}
includedProperties.Add(new NamedPropertyExpression(propertyName, propertyValue));
}
// create a property container that holds all these property names and values.
return(PropertyContainer.CreatePropertyContainer(includedProperties));
}
private Expression BuildPropertyContainer(IEdmEntityType elementType, Expression source,
Dictionary <IEdmNavigationProperty, ExpandedNavigationSelectItem> propertiesToExpand,
ISet <IEdmStructuralProperty> propertiesToInclude, ISet <IEdmStructuralProperty> autoSelectedProperties, bool isSelectingOpenTypeSegments)
{
IList <NamedPropertyExpression> includedProperties = new List <NamedPropertyExpression>();
foreach (KeyValuePair <IEdmNavigationProperty, ExpandedNavigationSelectItem> kvp in propertiesToExpand)
{
IEdmNavigationProperty propertyToExpand = kvp.Key;
ExpandedNavigationSelectItem expandItem = kvp.Value;
SelectExpandClause projection = expandItem.SelectAndExpand;
Expression propertyName = CreatePropertyNameExpression(elementType, propertyToExpand, source);
Expression propertyValue = CreatePropertyValueExpressionWithFilter(elementType, propertyToExpand, source,
expandItem.FilterOption);
Expression nullCheck = Expression.Equal(propertyValue, Expression.Constant(null));
// projection can be null if the expanded navigation property is not further projected or expanded.
if (projection != null)
{
propertyValue = ProjectAsWrapper(propertyValue, projection, propertyToExpand.ToEntityType());
}
NamedPropertyExpression propertyExpression = new NamedPropertyExpression(propertyName, propertyValue);
if (projection != null)
{
if (!propertyToExpand.Type.IsCollection())
{
propertyExpression.NullCheck = nullCheck;
}
else if (_settings.PageSize != null)
{
propertyExpression.PageSize = _settings.PageSize.Value;
}
}
includedProperties.Add(propertyExpression);
}
foreach (IEdmStructuralProperty propertyToInclude in propertiesToInclude)
{
Expression propertyName = CreatePropertyNameExpression(elementType, propertyToInclude, source);
Expression propertyValue = CreatePropertyValueExpression(elementType, propertyToInclude, source);
includedProperties.Add(new NamedPropertyExpression(propertyName, propertyValue));
}
foreach (IEdmStructuralProperty propertyToInclude in autoSelectedProperties)
{
Expression propertyName = CreatePropertyNameExpression(elementType, propertyToInclude, source);
Expression propertyValue = CreatePropertyValueExpression(elementType, propertyToInclude, source);
includedProperties.Add(new NamedPropertyExpression(propertyName, propertyValue)
{
AutoSelected = true
});
}
if (isSelectingOpenTypeSegments)
{
var dynamicPropertyDictionary = EdmLibHelpers.GetDynamicPropertyDictionary(elementType, _model);
Expression propertyName = Expression.Constant(dynamicPropertyDictionary.Name);
Expression propertyValue = Expression.Property(source, dynamicPropertyDictionary.Name);
includedProperties.Add(new NamedPropertyExpression(propertyName, propertyValue));
}
// create a property container that holds all these property names and values.
return(PropertyContainer.CreatePropertyContainer(includedProperties));
}
