// Verifies if provided column node supports delegation.
protected bool IsDelegatableColumnNode(FirstNameNode node, TexlBinding binding, IOpDelegationStrategy opDelStrategy, DelegationCapability capability)
{
Contracts.AssertValue(node);
Contracts.AssertValue(binding);
Contracts.AssertValueOrNull(opDelStrategy);
Contracts.Assert(binding.IsRowScope(node));
FirstNameInfo firstNameInfo = binding.GetInfo(node.AsFirstName());
if (firstNameInfo == null)
{
return(false);
}
IDelegationMetadata metadata = GetCapabilityMetadata(firstNameInfo);
// This means that this row scoped field is from some parent scope which is non-delegatable. That should deny delegation at that point.
// For this scope, this means that value will be provided from some other source.
// For example, AddColumns(CDS, "Column1", LookUp(CDS1, Name in FirstName))
// CDS - *[Name:s], CDS1 - *[FirstName:s]
if (metadata == null)
{
return(true);
}
var columnName = firstNameInfo.Name;
Contracts.AssertValid(columnName);
var columnPath = DPath.Root.Append(columnName);
if (!metadata.FilterDelegationMetadata.IsDelegationSupportedByColumn(columnPath, capability))
{
var safeColumnName = CharacterUtils.MakeSafeForFormatString(columnName.Value);
var message = string.Format(StringResources.Get(TexlStrings.OpNotSupportedByColumnSuggestionMessage_OpNotSupportedByColumn), safeColumnName);
SuggestDelegationHintAndAddTelemetryMessage(node, binding, message, TexlStrings.OpNotSupportedByColumnSuggestionMessage_OpNotSupportedByColumn, safeColumnName);
TrackingProvider.Instance.SetDelegationTrackerStatus(DelegationStatus.NoDelSupportByColumn, node, binding, _function, DelegationTelemetryInfo.CreateNoDelSupportByColumnTelemetryInfo(firstNameInfo));
return(false);
}
// If there is any operator applied on this node then check if column supports operation.
if (opDelStrategy != null && !opDelStrategy.IsOpSupportedByColumn(metadata.FilterDelegationMetadata, node.AsFirstName(), columnPath, binding))
{
return(false);
}
return(true);
}
public bool IsValidDottedNameNode(DottedNameNode node, TexlBinding binding, OperationCapabilityMetadata metadata, IOpDelegationStrategy opDelStrategy)
{
Contracts.AssertValue(node);
Contracts.AssertValue(binding);
Contracts.AssertValueOrNull(opDelStrategy);
var isRowScoped = binding.IsRowScope(node);
if (!isRowScoped)
{
return(IsValidNode(node, binding));
}
bool isRowScopedDelegationExempted;
if (!IsValidRowScopedDottedNameNode(node, binding, metadata, out isRowScopedDelegationExempted))
{
var telemetryMessage = string.Format("Kind:{0}, isRowScoped:{1}",
node.Kind, isRowScoped);
SuggestDelegationHintAndAddTelemetryMessage(node, binding, telemetryMessage);
return(false);
}
if (isRowScopedDelegationExempted)
{
binding.SetBlockScopedConstantNode(node);
return(true);
}
if (binding.TryGetFullRecordRowScopeAccessInfo(node, out var firstNameInfo))
{
// This means that this row scoped field is from some parent scope which is non-delegatable. That should deny delegation at that point.
// For this scope, this means that value will be provided from some other source.
// For example, AddColumns(CDS As Left, "Column1", LookUp(CDS1, Left.Name in FirstName))
// CDS - *[Name:s], CDS1 - *[FirstName:s]
if (GetCapabilityMetadata(firstNameInfo) == null)
{
return(true);
}
}
if (!binding.GetType(node.Left).HasExpandInfo)
{
DPath columnPath;
if (!BinderUtils.TryConvertNodeToDPath(binding, node, out columnPath) || !metadata.IsDelegationSupportedByColumn(columnPath, _function.FunctionDelegationCapability))
{
var safeColumnName = CharacterUtils.MakeSafeForFormatString(columnPath.ToDottedSyntax());
var message = string.Format(StringResources.Get(TexlStrings.OpNotSupportedByColumnSuggestionMessage_OpNotSupportedByColumn), safeColumnName);
SuggestDelegationHintAndAddTelemetryMessage(node, binding, message, TexlStrings.OpNotSupportedByColumnSuggestionMessage_OpNotSupportedByColumn, safeColumnName);
TrackingProvider.Instance.SetDelegationTrackerStatus(DelegationStatus.NoDelSupportByColumn, node, binding, _function, DelegationTelemetryInfo.CreateNoDelSupportByColumnTelemetryInfo(columnPath.ToDottedSyntax()));
return(false);
}
// If there is any operator applied on this node then check if column supports operation.
return(opDelStrategy?.IsOpSupportedByColumn(metadata, node, columnPath, binding) ?? true);
}
// If there is an entity reference then we need to do additional verification.
IExpandInfo info = binding.GetType(node.Left).ExpandInfo.VerifyValue();
var dataSourceInfo = info.ParentDataSource;
IDataEntityMetadata entityMetadata;
if (!dataSourceInfo.DataEntityMetadataProvider.TryGetEntityMetadata(info.Identity, out entityMetadata))
{
var telemetryMessage = string.Format("Kind:{0}, isRowScoped:{1}, no metadata found for entity {2}",
node.Kind, isRowScoped, CharacterUtils.MakeSafeForFormatString(info.Identity));
SuggestDelegationHintAndAddTelemetryMessage(node, binding, telemetryMessage);
return(false);
}
OperationCapabilityMetadata entityCapabilityMetadata = GetScopedOperationCapabilityMetadata(entityMetadata.DelegationMetadata);
string maybeLogicalName;
DName columnName = node.Right.Name;
if (entityMetadata.DisplayNameMapping.TryGetFromSecond(node.Right.Name.Value, out maybeLogicalName))
{
columnName = new DName(maybeLogicalName);
}
var entityColumnPath = DPath.Root.Append(columnName);
if (!entityCapabilityMetadata.IsDelegationSupportedByColumn(entityColumnPath, _function.FunctionDelegationCapability))
{
var safeColumnName = CharacterUtils.MakeSafeForFormatString(columnName.Value);
var message = string.Format(StringResources.Get(TexlStrings.OpNotSupportedByColumnSuggestionMessage_OpNotSupportedByColumn), safeColumnName);
SuggestDelegationHintAndAddTelemetryMessage(node, binding, message, TexlStrings.OpNotSupportedByColumnSuggestionMessage_OpNotSupportedByColumn, safeColumnName);
TrackingProvider.Instance.SetDelegationTrackerStatus(DelegationStatus.NoDelSupportByColumn, node, binding, _function, DelegationTelemetryInfo.CreateNoDelSupportByColumnTelemetryInfo(columnName));
return(false);
}
// If there is any operator applied on this node then check if column supports operation.
return(opDelStrategy?.IsOpSupportedByColumn(entityCapabilityMetadata, node, entityColumnPath, binding) ?? true);
}