public override void Handle(ExpandedNavigationSelectItem item)
{
var edmNavigationProperty = item.PathToNavigationProperty.LastSegment.As <NavigationPropertySegment>().NavigationProperty;
INavigationProperty navigationProperty;
if (!this.resultingDtoBuilder.EntityType.TryGetNavigationProperty(edmNavigationProperty.Name, out navigationProperty))
{
throw new KeyNotFoundException("Navigation property " + edmNavigationProperty.Name + " not found.");
}
var childEntities = this.entityReader.ReadEntitiesFromRelativePath(this.modelContext, this.sourceEntity, item.PathToNavigationProperty);
if (item.SelectAndExpand == null || item.SelectAndExpand.AllSelected)
{
this.resultingDtoBuilder.ApplyNavigationProperty(navigationProperty, childEntities, this.defaultChildDtoInitializer);
}
else
{
// handle the select/expand clause of the child entity
this.resultingDtoBuilder.ApplyNavigationProperty(
navigationProperty,
childEntities,
(childDtoBuilder, childEntity) =>
{
var childHandler = new DefaultSelectItemHandler(
this.entityReader,
this.modelContext,
childEntity,
childDtoBuilder,
this.defaultChildDtoInitializer);
item.SelectAndExpand.SelectedItems.ForEach(i => i.HandleWith(childHandler));
});
}
}
private IEnumerable <ODataEntityDto> SerializeEntities(
IBindableModelContext context,
IEnumerable <IEntity> entities,
IEntityType entityType,
SelectExpandClause selectExpandClause)
{
foreach (var entity in entities)
{
var dtoBuilder = this.dtoBuilderFactory.Create(entityType);
if (selectExpandClause == null || selectExpandClause.AllSelected)
{
SelectAllProperties(dtoBuilder, entity);
}
else
{
var selectItemHandler = new DefaultSelectItemHandler(this.entityReader, context, entity, dtoBuilder, SelectAllProperties);
selectItemHandler.HandleAll(selectExpandClause.SelectedItems);
}
yield return(dtoBuilder.DtoUnderConstruction);
}
}