/// <summary>
/// Creates a new instance of the <see cref="SelectExpandNode"/> class describing the set of structural properties,
/// navigation properties, and actions to select and expand for the given <paramref name="writeContext"/>.
/// </summary>
/// <param name="entityType">The entity type of the entry that would be written.</param>
/// <param name="writeContext">The serializer context to be used while creating the collection.</param>
/// <remarks>The default constructor is for unit testing only.</remarks>
public SelectExpandNode(IEdmEntityType entityType, ODataSerializerContext writeContext)
: this(writeContext.SelectExpandClause, entityType, writeContext.Model)
{
var queryOptionParser = new ODataQueryOptionParser(
writeContext.Model,
entityType,
writeContext.NavigationSource,
_extraQueryParameters);
var selectExpandClause = queryOptionParser.ParseSelectAndExpand();
if (selectExpandClause != null)
{
foreach (SelectItem selectItem in selectExpandClause.SelectedItems)
{
ExpandedNavigationSelectItem expandItem = selectItem as ExpandedNavigationSelectItem;
if (expandItem != null)
{
ValidatePathIsSupported(expandItem.PathToNavigationProperty);
NavigationPropertySegment navigationSegment = (NavigationPropertySegment)expandItem.PathToNavigationProperty.LastSegment;
IEdmNavigationProperty navigationProperty = navigationSegment.NavigationProperty;
if (!ExpandedNavigationProperties.ContainsKey(navigationProperty))
{
ExpandedNavigationProperties.Add(navigationProperty, expandItem.SelectAndExpand);
}
}
}
}
SelectedNavigationProperties.ExceptWith(ExpandedNavigationProperties.Keys);
}
private void BuildExpansions(SelectExpandClause selectExpandClause, HashSet <IEdmNavigationProperty> allNavigationProperties)
{
foreach (SelectItem selectItem in selectExpandClause.SelectedItems)
{
ExpandedNavigationSelectItem expandItem = selectItem as ExpandedNavigationSelectItem;
if (expandItem != null)
{
ValidatePathIsSupported(expandItem.PathToNavigationProperty);
NavigationPropertySegment navigationSegment = (NavigationPropertySegment)expandItem.PathToNavigationProperty.LastSegment;
IEdmNavigationProperty navigationProperty = navigationSegment.NavigationProperty;
if (allNavigationProperties.Contains(navigationProperty))
{
ExpandedNavigationProperties.Add(navigationProperty, expandItem.SelectAndExpand);
}
}
}
}