protected bool IsValidNode(TexlNode node, TexlBinding binding)
{
Contracts.AssertValue(node);
Contracts.AssertValue(binding);
bool isAsync = binding.IsAsync(node);
bool isPure = binding.IsPure(node);
if (node is DottedNameNode &&
((binding.GetType(node.AsDottedName().Left).Kind == DKind.OptionSet && binding.GetType(node).Kind == DKind.OptionSetValue) ||
(binding.GetType(node.AsDottedName().Left).Kind == DKind.View && binding.GetType(node).Kind == DKind.ViewValue)))
{
// OptionSet and View Access are delegable despite being async
return(true);
}
if (node is CallNode && (binding.IsBlockScopedConstant(node) ||
(binding.GetInfo(node as CallNode).Function is AsTypeFunction)))
{
// AsType is delegable despite being async
return(true);
}
// Async predicates and impure nodes are not supported.
// Let CallNodes for User() be marked as being Valid to allow
// expressions with User() calls to be delegated
if (!(IsUserCallNodeDelegable(node, binding)) && (isAsync || !isPure))
{
var telemetryMessage = string.Format("Kind:{0}, isAsync:{1}, isPure:{2}", node.Kind, isAsync, isPure);
SuggestDelegationHintAndAddTelemetryMessage(node, binding, telemetryMessage);
if (isAsync)
{
TrackingProvider.Instance.SetDelegationTrackerStatus(DelegationStatus.AsyncPredicate, node, binding, _function);
}
if (!isPure)
{
TrackingProvider.Instance.SetDelegationTrackerStatus(DelegationStatus.ImpureNode, node, binding, _function, DelegationTelemetryInfo.CreateImpureNodeTelemetryInfo(node, binding));
}
return(false);
}
return(true);
}
private bool IsValidSortOrderNode(TexlNode node, SortOpMetadata metadata, TexlBinding binding, DPath columnPath)
{
Contracts.AssertValue(node);
Contracts.AssertValue(metadata);
Contracts.AssertValue(binding);
Contracts.AssertValid(columnPath);
if (binding.IsAsync(node))
{
var message = string.Format("Function:{0}, SortOrderNode is async", Name);
AddSuggestionMessageToTelemetry(message, node, binding);
return(false);
}
string sortOrder;
switch (node.Kind)
{
case NodeKind.FirstName:
case NodeKind.StrLit:
return(_sortOrderValidator.TryGetValidValue(node, binding, out sortOrder) &&
IsSortOrderSuppportedByColumn(sortOrder, metadata, columnPath));
case NodeKind.DottedName:
case NodeKind.Call:
if (_sortOrderValidator.TryGetValidValue(node, binding, out sortOrder) &&
IsSortOrderSuppportedByColumn(sortOrder, metadata, columnPath))
{
return(true);
}
// If both ascending and descending are supported then we can support this.
return(IsSortOrderSuppportedByColumn(Microsoft.PowerFx.Core.Utils.LanguageConstants.DescendingSortOrderString, metadata, columnPath) &&
IsSortOrderSuppportedByColumn(Microsoft.PowerFx.Core.Utils.LanguageConstants.AscendingSortOrderString, metadata, columnPath));
default:
AddSuggestionMessageToTelemetry("Unsupported sortorder node.", node, binding);
return(false);
}
}
private bool IsValidSortOrderNode(TexlNode node, SortOpMetadata metadata, TexlBinding binding, DPath columnPath)
{
Contracts.AssertValue(node);
Contracts.AssertValue(metadata);
Contracts.AssertValue(binding);
Contracts.AssertValid(columnPath);
if (binding.IsAsync(node))
{
AddSuggestionMessageToTelemetry("Async sortorder node.", node, binding);
DelegationTrackerCore.SetDelegationTrackerStatus(DelegationStatus.AsyncSortOrder, node, binding, this, DelegationTelemetryInfo.CreateEmptyDelegationTelemetryInfo());
return(false);
}
string sortOrder;
switch (node.Kind)
{
case NodeKind.FirstName:
case NodeKind.StrLit:
return(_sortOrderValidator.TryGetValidValue(node, binding, out sortOrder) &&
IsSortOrderSuppportedByColumn(node, binding, sortOrder, metadata, columnPath));
case NodeKind.DottedName:
case NodeKind.Call:
if (_sortOrderValidator.TryGetValidValue(node, binding, out sortOrder) &&
IsSortOrderSuppportedByColumn(node, binding, sortOrder, metadata, columnPath))
{
return(true);
}
// If both ascending and descending are supported then we can support this.
return(IsSortOrderSuppportedByColumn(node, binding, LanguageConstants.DescendingSortOrderString, metadata, columnPath) &&
IsSortOrderSuppportedByColumn(node, binding, LanguageConstants.AscendingSortOrderString, metadata, columnPath));
default:
AddSuggestionMessageToTelemetry("Unsupported sortorder node kind.", node, binding);
return(false);
}
}
// Verifies if given kind of node is supported by function delegation.
private bool IsSupportedNode(TexlNode node, OperationCapabilityMetadata metadata, TexlBinding binding, IOpDelegationStrategy opDelStrategy, bool isRHSNode)
{
Contracts.AssertValue(node);
Contracts.AssertValue(metadata);
Contracts.AssertValue(binding);
Contracts.AssertValue(opDelStrategy);
if (!binding.IsRowScope(node))
{
// Check whether this is -
// 1) in operator delegation and
// 2) it is verifying if RHS node is supported and
// 3) it is not an async node and
// 4) it is a single column table and
// 5) metadata belongs to cds datasource that supports delegation of CdsIn
// If this check fails, verify if it is simply a valid node..
// Eg of valid delegation functions -
// Filter(Accounts, 'Account Name' in ["Foo", Bar"]) - Direct table use
// Set(Names, ["Foo", Bar"]); Filter(Accounts, 'Account Name' in Names) - Using variable of type table
// ClearCollect(Names, Accounts); Filter(Accounts, 'Account Name' in Names.'Account Name') - using column from collection.
// This won't be delegated - Filter(Accounts, 'Account Name' in Accounts.'Account Name') as Accounts.'Account Name' is async.
if ((binding.Document.Properties.EnabledFeatures.IsEnhancedDelegationEnabled &&
isRHSNode && (opDelStrategy as BinaryOpDelegationStrategy)?.Op == BinaryOp.In && !binding.IsAsync(node) && binding.GetType(node).IsTable&& binding.GetType(node).IsColumn&&
metadata.IsDelegationSupportedByTable(DelegationCapability.CdsIn)) ||
IsValidNode(node, binding))
{
return(true);
}
}
switch (node.Kind)
{
case NodeKind.DottedName:
{
if (!opDelStrategy.IsOpSupportedByTable(metadata, node, binding))
{
return(false);
}
var dottedNodeValStrategy = _function.GetDottedNameNodeDelegationStrategy();
return(dottedNodeValStrategy.IsValidDottedNameNode(node.AsDottedName(), binding, metadata, opDelStrategy));
}
case NodeKind.Call:
{
if (!opDelStrategy.IsOpSupportedByTable(metadata, node, binding))
{
return(false);
}
var cNodeValStrategy = _function.GetCallNodeDelegationStrategy();
return(cNodeValStrategy.IsValidCallNode(node.AsCall(), binding, metadata));
}
case NodeKind.FirstName:
{
var firstNameNodeValStrategy = _function.GetFirstNameNodeDelegationStrategy();
return(firstNameNodeValStrategy.IsValidFirstNameNode(node.AsFirstName(), binding, opDelStrategy));
}
case NodeKind.UnaryOp:
{
if (!opDelStrategy.IsOpSupportedByTable(metadata, node, binding))
{
return(false);
}
var unaryopNode = node.AsUnaryOpLit();
IOpDelegationStrategy unaryOpNodeDelegationStrategy = _function.GetOpDelegationStrategy(unaryopNode.Op);
return(unaryOpNodeDelegationStrategy.IsSupportedOpNode(unaryopNode, metadata, binding));
}
case NodeKind.BinaryOp:
{
if (!opDelStrategy.IsOpSupportedByTable(metadata, node, binding))
{
return(false);
}
var binaryOpNode = node.AsBinaryOp().VerifyValue();
opDelStrategy = _function.GetOpDelegationStrategy(binaryOpNode.Op, binaryOpNode);
var binaryOpDelStrategy = (opDelStrategy as BinaryOpDelegationStrategy).VerifyValue();
Contracts.Assert(binaryOpNode.Op == binaryOpDelStrategy.Op);
if (!opDelStrategy.IsSupportedOpNode(node, metadata, binding))
{
SuggestDelegationHint(binaryOpNode, binding);
return(false);
}
break;
}
default:
{
var kind = node.Kind;
if (kind != NodeKind.BoolLit && kind != NodeKind.StrLit && kind != NodeKind.NumLit)
{
var telemetryMessage = string.Format("NodeKind {0} unsupported.", kind);
SuggestDelegationHintAndAddTelemetryMessage(node, binding, telemetryMessage);
return(false);
}
break;
}
}
return(true);
}