private static IEnumerable <SelectItem> GetAutoExpandedNavigationSelectItems(
IEdmEntityType baseEntityType,
IEdmModel model,
string alreadyExpandedNavigationSourceName,
IEdmNavigationSource navigationSource,
bool isAllSelected,
bool searchDerivedTypeWhenAutoExpand)
{
var expandItems = new List <SelectItem>();
var autoExpandNavigationProperties = EdmLibHelpers.GetAutoExpandNavigationProperties(baseEntityType, model,
searchDerivedTypeWhenAutoExpand);
foreach (var navigationProperty in autoExpandNavigationProperties)
{
if (!alreadyExpandedNavigationSourceName.Equals(navigationProperty.Name))
{
IEdmEntityType entityType = navigationProperty.DeclaringEntityType();
IEdmNavigationSource currentEdmNavigationSource =
navigationSource.FindNavigationTarget(navigationProperty);
if (currentEdmNavigationSource != null)
{
List <ODataPathSegment> pathSegments = new List <ODataPathSegment>()
{
new NavigationPropertySegment(navigationProperty, currentEdmNavigationSource)
};
ODataExpandPath expandPath = new ODataExpandPath(pathSegments);
SelectExpandClause selectExpandClause = new SelectExpandClause(new List <SelectItem>(),
true);
ExpandedNavigationSelectItem item = new ExpandedNavigationSelectItem(expandPath,
currentEdmNavigationSource, selectExpandClause);
if (!currentEdmNavigationSource.EntityType().Equals(entityType))
{
IEnumerable <SelectItem> nestedSelectItems = GetAutoExpandedNavigationSelectItems(
currentEdmNavigationSource.EntityType(),
model,
alreadyExpandedNavigationSourceName,
item.NavigationSource,
true,
searchDerivedTypeWhenAutoExpand);
selectExpandClause = new SelectExpandClause(nestedSelectItems, true);
item = new ExpandedNavigationSelectItem(expandPath, currentEdmNavigationSource,
selectExpandClause);
}
expandItems.Add(item);
if (!isAllSelected)
{
PathSelectItem pathSelectItem = new PathSelectItem(
new ODataSelectPath(pathSegments));
expandItems.Add(pathSelectItem);
}
}
}
}
return(expandItems);
}
private string GetAutoExpandRawValue()
{
var expandRawValue = RawValues.Expand;
IEdmEntityType baseEntityType = Context.TargetStructuredType as IEdmEntityType;
var autoExpandRawValue = string.Empty;
var autoExpandNavigationProperties = EdmLibHelpers.GetAutoExpandNavigationProperties(
Context.TargetProperty, Context.TargetStructuredType, Context.Model,
!string.IsNullOrEmpty(RawValues.Select));
foreach (var property in autoExpandNavigationProperties)
{
if (!string.IsNullOrEmpty(autoExpandRawValue))
{
autoExpandRawValue += ",";
}
if (property.DeclaringEntityType() != baseEntityType)
{
autoExpandRawValue += string.Format(
CultureInfo.InvariantCulture,
"{0}/",
(object)property.DeclaringEntityType().FullTypeName());
}
autoExpandRawValue += property.Name;
}
if (!string.IsNullOrEmpty(autoExpandRawValue))
{
if (!string.IsNullOrEmpty(expandRawValue))
{
expandRawValue = string.Format(CultureInfo.InvariantCulture, "{0},{1}",
autoExpandRawValue, expandRawValue);
}
else
{
expandRawValue = autoExpandRawValue;
}
}
return(expandRawValue);
}
private string GetAutoExpandRawValue(bool discoverDerivedTypeWhenAutoExpand)
{
var expandRawValue = RawValues.Expand;
IEdmEntityType baseEntityType = Context.ElementType as IEdmEntityType;
var autoExpandRawValue = String.Empty;
var autoExpandNavigationProperties = EdmLibHelpers.GetAutoExpandNavigationProperties(baseEntityType,
Context.Model, discoverDerivedTypeWhenAutoExpand);
foreach (var property in autoExpandNavigationProperties)
{
if (!String.IsNullOrEmpty(autoExpandRawValue))
{
autoExpandRawValue += ",";
}
if (property.DeclaringEntityType() != baseEntityType)
{
autoExpandRawValue += String.Format(CultureInfo.InvariantCulture, "{0}/",
property.DeclaringEntityType().FullTypeName());
}
autoExpandRawValue += property.Name;
}
if (!String.IsNullOrEmpty(autoExpandRawValue))
{
if (!String.IsNullOrEmpty(expandRawValue))
{
expandRawValue = String.Format(CultureInfo.InvariantCulture, "{0},{1}",
autoExpandRawValue, expandRawValue);
}
else
{
expandRawValue = autoExpandRawValue;
}
}
return(expandRawValue);
}
private void GetAutoSelectExpandItems(
IEdmEntityType baseEntityType,
IEdmModel model,
IEdmNavigationSource navigationSource,
bool isAllSelected,
ModelBoundQuerySettings modelBoundQuerySettings,
int depth,
out List <SelectItem> autoSelectItems,
out List <SelectItem> autoExpandItems)
{
autoSelectItems = new List <SelectItem>();
var autoSelectProperties = EdmLibHelpers.GetAutoSelectProperties(null,
baseEntityType, model, modelBoundQuerySettings);
foreach (var autoSelectProperty in autoSelectProperties)
{
List <ODataPathSegment> pathSegments = new List <ODataPathSegment>()
{
new PropertySegment(autoSelectProperty)
};
PathSelectItem pathSelectItem = new PathSelectItem(
new ODataSelectPath(pathSegments));
autoSelectItems.Add(pathSelectItem);
}
autoExpandItems = new List <SelectItem>();
depth--;
if (depth < 0)
{
return;
}
var autoExpandNavigationProperties = EdmLibHelpers.GetAutoExpandNavigationProperties(null, baseEntityType,
model, !isAllSelected, modelBoundQuerySettings);
foreach (var navigationProperty in autoExpandNavigationProperties)
{
IEdmNavigationSource currentEdmNavigationSource =
navigationSource.FindNavigationTarget(navigationProperty);
if (currentEdmNavigationSource != null)
{
List <ODataPathSegment> pathSegments = new List <ODataPathSegment>()
{
new NavigationPropertySegment(navigationProperty, currentEdmNavigationSource)
};
ODataExpandPath expandPath = new ODataExpandPath(pathSegments);
SelectExpandClause selectExpandClause = new SelectExpandClause(new List <SelectItem>(),
true);
ExpandedNavigationSelectItem item = new ExpandedNavigationSelectItem(expandPath,
currentEdmNavigationSource, selectExpandClause);
modelBoundQuerySettings = EdmLibHelpers.GetModelBoundQuerySettings(navigationProperty,
navigationProperty.ToEntityType(), model);
List <SelectItem> nestedSelectItems;
List <SelectItem> nestedExpandItems;
int maxExpandDepth = GetMaxExpandDepth(modelBoundQuerySettings, navigationProperty.Name);
if (maxExpandDepth != 0 && maxExpandDepth < depth)
{
depth = maxExpandDepth;
}
GetAutoSelectExpandItems(
currentEdmNavigationSource.EntityType(),
model,
item.NavigationSource,
true,
modelBoundQuerySettings,
depth,
out nestedSelectItems,
out nestedExpandItems);
selectExpandClause = new SelectExpandClause(nestedSelectItems.Concat(nestedExpandItems),
nestedSelectItems.Count == 0);
item = new ExpandedNavigationSelectItem(expandPath, currentEdmNavigationSource,
selectExpandClause);
autoExpandItems.Add(item);
if (!isAllSelected || autoSelectProperties.Count() != 0)
{
PathSelectItem pathSelectItem = new PathSelectItem(
new ODataSelectPath(pathSegments));
autoExpandItems.Add(pathSelectItem);
}
}
}
}