/// <summary>
/// Returns all descendent nodes to the top node in a list in which the utmost descendants are
/// listed first and the top node itself is listed last.
/// </summary>
/// <param name="topNode">is the root node of a tree structure</param>
/// <returns>list of nodes with utmost descendants first ordered by level of depth in tree with top node last</returns>
public static IList <BaseAssemblyNodeFactory> GetDescendentNodesBottomUp(BaseAssemblyNodeFactory topNode)
{
var result = new List <BaseAssemblyNodeFactory>();
// Map to hold per level of the node (1 to Count depth) of node a list of nodes, if any
// exist at that level
var nodesPerLevel = new OrderedDictionary <int, ICollection <BaseAssemblyNodeFactory> >();
// Recursively enter all aggregate functions and their level into map
RecursiveAggregateEnter(topNode, nodesPerLevel, 1);
// Done if none found
if (nodesPerLevel.IsEmpty())
{
throw new IllegalStateException("EmptyFalse collection for nodes per level");
}
// From the deepest (highest) level to the lowest, add aggregates to list
int deepLevel = nodesPerLevel.Keys.Last();
for (int i = deepLevel; i >= 1; i--)
{
var list = nodesPerLevel.Get(i);
if (list == null)
{
continue;
}
result.AddAll(list);
}
return(result);
}
/// <summary> Builds a tree of <see cref="BaseAssemblyNode" /> from join strategy information.</summary>
/// <param name="rootStream">the root stream supplying the event to evaluate
/// </param>
/// <param name="streamsJoinedPerStream">a map in which the key is the stream number to supply an event,
/// and the value is an array of streams to find events in for the given event
/// </param>
/// <param name="isRequiredPerStream">indicates which streams are required join streams versus optional streams
/// </param>
/// <returns> root assembly node
/// </returns>
public static BaseAssemblyNodeFactory Build(int rootStream, IDictionary <Int32, int[]> streamsJoinedPerStream, bool[] isRequiredPerStream)
{
if (streamsJoinedPerStream.Count < 3)
{
throw new ArgumentException("Not a 3-way join");
}
if ((rootStream < 0) || (rootStream >= streamsJoinedPerStream.Count))
{
throw new ArgumentException("Invalid root stream");
}
if (isRequiredPerStream.Length != streamsJoinedPerStream.Count)
{
throw new ArgumentException("Arrays not matching up");
}
NStreamOuterQueryPlanBuilder.VerifyJoinedPerStream(rootStream, streamsJoinedPerStream);
if (Log.IsDebugEnabled)
{
Log.Debug(
".build Building node for root stream " + rootStream +
" streamsJoinedPerStream=" + NStreamOuterQueryPlanBuilder.Print(streamsJoinedPerStream) +
" isRequiredPerStream=" + isRequiredPerStream.Render());
}
BaseAssemblyNodeFactory topNode = CreateNode(
true,
rootStream,
streamsJoinedPerStream.Count,
streamsJoinedPerStream[rootStream],
isRequiredPerStream);
RecursiveBuild(rootStream, topNode, streamsJoinedPerStream, isRequiredPerStream);
if (Log.IsDebugEnabled)
{
StringWriter buf = new StringWriter();
IndentWriter indentWriter = new IndentWriter(buf, 0, 2);
topNode.PrintDescendends(indentWriter);
Log.Debug(".build Dumping root node for stream " + rootStream + ": \n" + buf.ToString());
}
return(topNode);
}
private static void RecursiveAggregateEnter(BaseAssemblyNodeFactory currentNode, IDictionary <int, ICollection <BaseAssemblyNodeFactory> > nodesPerLevel, int currentLevel)
{
// ask all child nodes to enter themselves
foreach (BaseAssemblyNodeFactory node in currentNode._childNodes)
{
RecursiveAggregateEnter(node, nodesPerLevel, currentLevel + 1);
}
// Add myself to list
var aggregates = nodesPerLevel.Get(currentLevel);
if (aggregates == null)
{
aggregates = new LinkedList <BaseAssemblyNodeFactory>();
nodesPerLevel.Put(currentLevel, aggregates);
}
aggregates.Add(currentNode);
}
private static void RecursiveBuild(int parentStreamNum, BaseAssemblyNodeFactory parentNode, IDictionary <Int32, int[]> streamsJoinedPerStream, bool[] isRequiredPerStream)
{
int numStreams = streamsJoinedPerStream.Count;
for (int i = 0; i < streamsJoinedPerStream[parentStreamNum].Length; i++)
{
int streamJoined = streamsJoinedPerStream[parentStreamNum][i];
BaseAssemblyNodeFactory childNode = CreateNode(
false,
streamJoined,
numStreams,
streamsJoinedPerStream[streamJoined],
isRequiredPerStream);
parentNode.AddChild(childNode);
if (streamsJoinedPerStream[streamJoined].Length > 0)
{
RecursiveBuild(streamJoined, childNode, streamsJoinedPerStream, isRequiredPerStream);
}
}
}
public override void AddChild(BaseAssemblyNodeFactory childNode)
{
_childStreamIndex[childNode.StreamNum] = ChildNodes.Count;
base.AddChild(childNode);
}
/// <summary>
/// Add a child node.
/// </summary>
/// <param name="childNode">to add</param>
public virtual void AddChild(BaseAssemblyNodeFactory childNode)
{
childNode._parentNode = this;
_childNodes.Add(childNode);
}
/// <summary>
/// Set parent node.
/// </summary>
public void SetParent(BaseAssemblyNodeFactory parent)
{
_parentNode = parent;
}
