/// <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);
}
