/// <summary>
/// Adds to the operations list all operations required to mutate
/// <paramref name="originalNode"/> to the state* of
/// <paramref name="newNode"/>.
/// </summary>
/// <param name="originalNode">The original node.</param>
/// <param name="newNode">The new node.</param>
/// <param name="ops">The operations list to add to.</param>
/// <param name="idGenerator">The temporary ID generator for ADD operations.</param>
/// <returns>The set of child product dimensions that require further
/// processing.</returns>
private void AddMutateOperations(ProductPartitionNode originalNode,
ProductPartitionNode newNode, List <OperationPair> ops, TemporaryIdGenerator idGenerator)
{
NodeDifference nodeDifference = Diff(originalNode, newNode, dimensionComparator);
bool isProcessChildren;
switch (nodeDifference)
{
case NodeDifference.NEW_NODE:
ops.AddRange(CreateAddOperations(newNode, idGenerator));
// No need to further process children. The ADD operations above will include operations
// for all children of newNode.
isProcessChildren = false;
break;
case NodeDifference.REMOVED_NODE:
ops.Add(CreateRemoveOperation(originalNode));
// No need to further process children. The REMOVE operation above will perform a
// cascading delete of all children of newNode.
isProcessChildren = false;
break;
case NodeDifference.PARTITION_TYPE_CHANGE:
case NodeDifference.EXCLUDED_UNIT_CHANGE:
ops.Add(CreateRemoveOperation(originalNode));
ops.AddRange(CreateAddOperations(newNode, idGenerator));
// No need to further process children. The ADD operations above will include operations
// for all children of newNode.
isProcessChildren = false;
break;
case NodeDifference.BID_CHANGE:
// Ensure that the new node has the proper ID (this may have been lost if the node
// was removed and then re-added).
newNode.ProductPartitionId = originalNode.ProductPartitionId;
ops.Add(CreateSetBidOperation(newNode));
// Process the children of newNode. The SET operation above will only handle changes
// made to newNode, not its children.
isProcessChildren = true;
break;
case NodeDifference.NONE:
// Ensure that the new node has the proper ID (this may have been lost if the node
// was removed and then re-added).
newNode.ProductPartitionId = originalNode.ProductPartitionId;
// This node does not have changes, but its children may.
isProcessChildren = true;
break;
default:
throw new InvalidOperationException("Unrecognized difference: " + nodeDifference);
}
if (isProcessChildren)
{
// Try to match the children in new and original trees to identify the
// matching dimensions.
foreach (ProductPartitionNode newChild in newNode.Children)
{
if (originalNode.HasChild(newChild.Dimension))
{
// this is probably an edit.
AddMutateOperations(originalNode.GetChild(newChild.Dimension), newChild, ops,
idGenerator);
}
else
{
// this is a new node.
AddMutateOperations(null, newChild, ops, idGenerator);
}
}
foreach (ProductPartitionNode originalChild in originalNode.Children)
{
if (newNode.HasChild(originalChild.Dimension))
{
// this is probably an edit. We dealt with it before
continue;
}
else
{
// this is a removed node.
AddMutateOperations(originalChild, null, ops, idGenerator);
}
}
}
}