internal void CheckForDuplicatePropertyNames(ODataNavigationLink navigationLink, bool isExpanded, bool?isCollection)
{
DuplicationRecord record;
string name = navigationLink.Name;
if (!this.TryGetDuplicationRecord(name, out record))
{
DuplicationRecord duplicationRecord = new DuplicationRecord(DuplicationKind.NavigationProperty);
ApplyNavigationLinkToDuplicationRecord(duplicationRecord, isExpanded, isCollection);
this.propertyNameCache.Add(name, duplicationRecord);
}
else
{
this.CheckNavigationLinkDuplicateNameForExistingDuplicationRecord(name, record);
if (((record.DuplicationKind == DuplicationKind.NavigationProperty) && record.AssociationLinkFound) && !record.NavigationLinkFound)
{
ApplyNavigationLinkToDuplicationRecord(record, isExpanded, isCollection);
}
else if (this.allowDuplicateProperties)
{
record.DuplicationKind = DuplicationKind.NavigationProperty;
ApplyNavigationLinkToDuplicationRecord(record, isExpanded, isCollection);
}
else
{
bool?isCollectionEffectiveValue = GetIsCollectionEffectiveValue(isExpanded, isCollection);
if ((isCollectionEffectiveValue == false) || (record.NavigationPropertyIsCollection == false))
{
throw new ODataException(Strings.DuplicatePropertyNamesChecker_MultipleLinksForSingleton(name));
}
if (isCollectionEffectiveValue.HasValue)
{
record.NavigationPropertyIsCollection = isCollectionEffectiveValue;
}
}
}
}
/// <summary>
/// Check the <paramref name="navigationLink"/> for duplicate property names in an entry or complex value.
/// If not explicitly allowed throw when duplicate properties are detected.
/// If duplicate properties are allowed see the comment on ODataWriterBehavior.AllowDuplicatePropertyNames
/// or ODataReaderBehavior.AllowDuplicatePropertyNames for further details.
/// </summary>
/// <param name="navigationLink">The navigation link to be checked.</param>
/// <param name="isExpanded">true if the link is expanded, false otherwise.</param>
/// <param name="isCollection">true if the navigation link is a collection, false if it's a singleton or null if we don't know.</param>
internal void CheckForDuplicatePropertyNames(ODataNavigationLink navigationLink, bool isExpanded, bool?isCollection)
{
DebugUtils.CheckNoExternalCallers();
#if DEBUG
this.startNavigationLinkName = null;
#endif
string propertyName = navigationLink.Name;
DuplicationRecord existingDuplicationRecord;
if (!this.TryGetDuplicationRecord(propertyName, out existingDuplicationRecord))
{
DuplicationRecord duplicationRecord = new DuplicationRecord(DuplicationKind.NavigationProperty);
ApplyNavigationLinkToDuplicationRecord(duplicationRecord, isExpanded, isCollection);
this.propertyNameCache.Add(propertyName, duplicationRecord);
}
else
{
// First check for duplication without expansion knowledge.
this.CheckNavigationLinkDuplicateNameForExistingDuplicationRecord(propertyName, existingDuplicationRecord);
if (existingDuplicationRecord.DuplicationKind == DuplicationKind.NavigationProperty &&
existingDuplicationRecord.AssociationLinkFound &&
!existingDuplicationRecord.NavigationLinkFound)
{
// If the existing one is just an association link, update it to include the navigation link portion as well
ApplyNavigationLinkToDuplicationRecord(existingDuplicationRecord, isExpanded, isCollection);
}
else if (this.allowDuplicateProperties)
{
Debug.Assert(
(existingDuplicationRecord.DuplicationKind == DuplicationKind.PotentiallyAllowed || existingDuplicationRecord.DuplicationKind == DuplicationKind.NavigationProperty),
"We should have already taken care of prohibit duplication.");
// If the configuration explicitly allows duplication, then just turn the existing property into a nav link with all the information we have
existingDuplicationRecord.DuplicationKind = DuplicationKind.NavigationProperty;
ApplyNavigationLinkToDuplicationRecord(existingDuplicationRecord, isExpanded, isCollection);
}
else
{
// We've found two navigation links in a request
Debug.Assert(
existingDuplicationRecord.DuplicationKind == DuplicationKind.NavigationProperty && existingDuplicationRecord.NavigationLinkFound && !this.isResponse,
"We can only get here if we've found two navigation links in a request.");
bool?isCollectionEffectiveValue = GetIsCollectionEffectiveValue(isExpanded, isCollection);
// If one of them is a definitive singleton, then we fail.
if (isCollectionEffectiveValue == false || existingDuplicationRecord.NavigationPropertyIsCollection == false)
{
// This is the case where an expanded singleton is followed by a deferred link for example.
// Once we know for sure that the nav. prop. is a singleton we can't allow more than one link for it.
throw new ODataException(Strings.DuplicatePropertyNamesChecker_MultipleLinksForSingleton(propertyName));
}
// Otherwise allow it, but update the link with the new information
if (isCollectionEffectiveValue.HasValue)
{
existingDuplicationRecord.NavigationPropertyIsCollection = isCollectionEffectiveValue;
}
}
}
}
