internal static DynamicUpdateMap Merge(DynamicUpdateMap first, DynamicUpdateMap second, MergeErrorContext errorContext) { if (first == null || second == null) { return(first ?? second); } if (first.IsNoChanges || second.IsNoChanges) { // DynamicUpdateMap.NoChanges has zero members, so we need to special-case it here. return(first.IsNoChanges ? second : first); } ThrowIfMapsIncompatible(first, second, errorContext); DynamicUpdateMap result = new DynamicUpdateMap { IsForImplementation = first.IsForImplementation, NewDefinitionMemberCount = second.NewDefinitionMemberCount, ArgumentsAreUnknown = first.ArgumentsAreUnknown && second.ArgumentsAreUnknown, oldArguments = first.ArgumentsAreUnknown ? second.oldArguments : first.oldArguments, newArguments = second.ArgumentsAreUnknown ? first.newArguments : second.newArguments }; foreach (DynamicUpdateMapEntry firstEntry in first.Entries) { DynamicUpdateMapEntry parent = null; if (firstEntry.Parent != null) { result.TryGetUpdateEntry(firstEntry.Parent.OldActivityId, out parent); } if (firstEntry.IsRemoval) { result.AddEntry(firstEntry.Clone(parent)); } else { DynamicUpdateMapEntry secondEntry = second.entries[firstEntry.NewActivityId]; result.AddEntry(DynamicUpdateMapEntry.Merge(firstEntry, secondEntry, parent, errorContext)); } } return(result); }
// Wrap an implementation map in a dummy map. This allows use of an implementation map as the // root map in the case when the root is an x:Class with no public children. internal DynamicUpdateMap AsRootMap() { Fx.Assert(this.IsForImplementation, "This should only be called on implementation map"); if (!ActivityComparer.ListEquals(this.NewArguments, this.OldArguments)) { throw FxTrace.Exception.AsError(new InstanceUpdateException(SR.InvalidImplementationAsWorkflowRootForRuntimeStateBecauseArgumentsChanged)); } DynamicUpdateMap result = new DynamicUpdateMap { IsImplementationAsRoot = true, NewDefinitionMemberCount = 1 }; result.AddEntry(new DynamicUpdateMapEntry(1, 1) { ImplementationUpdateMap = this, }); return(result); }