protected PatternTree(IList <NodeSymbol> preorderRepresentation, bool singleChild, MiningParams miningParams)
{
if (preorderRepresentation == null)
{
throw new ArgumentNullException("preorderRepresentation");
}
if (preorderRepresentation.Count < 2 || preorderRepresentation.Count % 2 != 0)
{
throw new ArgumentException("Invalid preorder representation.");
}
PreorderString = preorderRepresentation.ToPreorderString(miningParams.Separator);
SingleChild = singleChild;
PreorderRepresentation = new ReadOnlyCollection <NodeSymbol>(preorderRepresentation);
depthOccSet = new Dictionary <Depth, DepthOccSet>();
supportTransactionSet = new HashSet <TreeId>();
NumberOfRightMostOcc = 0;
RootSupport = 0;
AbleToConnect = Is2Pattern;
AbleToBeConnected = !Is1Pattern;
AbleToCombine = true;
MiningParams = miningParams;
}
internal static void PruneAfterConnection(PatternRecorderFrequent fRecorder, MiningParams param, Depth depth)
{
if (!param.MineFrequent && (param.MineClosed || param.MineMaximal))
{
PruneCannotBeClosed(fRecorder, param, depth);
}
PruneCannotBeExtended(fRecorder, param, depth);
}
private static void PruneCannotBeExtended(PatternRecorderFrequent fRecorder, MiningParams param, Depth depth)
{
var fDi = fRecorder.GetFrequentsAtDepth(depth + 1);
foreach (var fpt in fDi)
{
fpt.PruneAfterConnection(param, depth);
}
fRecorder.RemoveCannotBeExtended(depth + 1);
}
protected CCTreeMinerAlgorithm(ICloneable miningParams)
{
if (miningParams == null)
{
throw new ArgumentNullException("miningParams");
}
IsMining = false;
MiningParams = (MiningParams)miningParams.Clone();
}
public override string ToString()
{
var sb = new StringBuilder(MiningParams.ToString());
sb.Append(Environment.NewLine);
sb.AppendLine("Maximal Depth: " + MaxDepth);
sb.AppendLine(string.Format("Total Time Elapsed: {0}ms", TotalTimeElapsed));
sb.AppendLine("Extended Patterns Count: " + ExtendedPatternsCount);
sb.AppendLine("Frequent Patterns Count: " + FrequentPatternsCount);
sb.AppendLine("Closed Patterns Count: " + ClosedPatternsCount);
sb.AppendLine("Maximal Patterns Count: " + MaximalPatternsCount);
return(sb.ToString());
}
public static PatternTree Create(NodeSymbol[] preorderRepresentation,
bool singleChild, MiningParams miningParams)
{
if (preorderRepresentation == null || preorderRepresentation.Length < 2)
{
throw new ArgumentException("Invalid preorder representation.");
}
if (preorderRepresentation.Length == 2)
{
return(new OnePatternTree(preorderRepresentation, singleChild, miningParams));
}
return(new PatternTree(preorderRepresentation, singleChild, miningParams));
}
public static MiningResults Mine(IList <ITextTree> treeSet, MiningParams miningParams)
{
if (treeSet == null)
{
throw new ArgumentNullException("treeSet");
}
if (miningParams == null)
{
throw new ArgumentNullException("miningParams");
}
var cctreeMiner = CCTreeMinerFactory.GetCCTreeMiner(miningParams);
return(cctreeMiner.Mine(treeSet));
}
protected MiningParams(MiningParams another)
{
subtreeType = another.SubtreeType;
mineOrdered = another.MineOrdered;
mineFrequent = another.MineFrequent;
mineClosed = another.MineClosed;
mineMaximal = another.MineMaximal;
supportType = another.SupportType;
thresholdRoot = another.ThresholdRoot;
thresholdTransaction = another.ThresholdTransaction;
separator = another.separator;
backTrackSymbol = string.Copy(another.backTrackSymbol);
}
internal static CCTreeMinerAlgorithm GetCCTreeMiner(MiningParams miningParams)
{
if (miningParams == null)
{
throw new ArgumentNullException("miningParams");
}
switch (miningParams.SubtreeType)
{
case SubtreeType.BottomUp:
return(new BottomUpMiner(miningParams));
case SubtreeType.Induced:
return(new InducedMiner(miningParams));
case SubtreeType.Embedded:
return(new EmbeddedMiner(miningParams));
default:
throw new ArgumentOutOfRangeException();
}
}
public BottomUpMiner(MiningParams miningParams) : base(miningParams)
{
throw new NotImplementedException();
}
public EmbeddedMiner(MiningParams miningParams) : base(miningParams)
{
throw new NotImplementedException();
}
internal void PruneAfterConnection(MiningParams param, Depth depth)
{
switch (param.SupportType)
{
case SupportType.Transaction:
{
if (AbleToCombine || AbleToConnect)
{
var t = TransactionSupportAbove(depth + 1, true);
if (t < param.ThresholdTransaction)
{
AbleToCombine = false;
AbleToConnect = false;
}
}
if (AbleToBeConnected)
{
var t = TransactionSupportAbove(depth + 1, false);
if (t < param.ThresholdTransaction)
{
AbleToBeConnected = false;
}
}
}
break;
case SupportType.RootOccurrence:
{
if (AbleToCombine || AbleToConnect)
{
var r = RootSupportAbove(depth + 1, true);
if (r < param.ThresholdRoot)
{
AbleToCombine = false;
AbleToConnect = false;
}
}
if (AbleToBeConnected)
{
var r = RootSupportAbove(depth + 1, false);
if (r < param.ThresholdRoot)
{
AbleToBeConnected = false;
}
}
}
break;
case SupportType.Hybrid:
{
if (AbleToCombine || AbleToConnect)
{
var t = TransactionSupportAbove(depth + 1, true);
if (t < param.ThresholdTransaction)
{
AbleToCombine = false;
AbleToConnect = false;
}
else
{
var r = RootSupportAbove(depth + 1, true);
if (r < param.ThresholdRoot)
{
AbleToCombine = false;
AbleToConnect = false;
}
}
}
if (AbleToBeConnected)
{
var t = RootSupportAbove(depth + 1, false);
if (t < param.ThresholdTransaction)
{
AbleToBeConnected = false;
}
else
{
var r = RootSupportAbove(depth + 1, false);
if (r < param.ThresholdRoot)
{
AbleToBeConnected = false;
}
}
}
}
break;
default:
throw new ArgumentOutOfRangeException();
}
}
public InducedMiner(MiningParams miningParams) : base(miningParams)
{
}
private static void PruneCannotBeClosed(PatternRecorderFrequent fRecorder, MiningParams param, Depth depth)
{
if (param.MineFrequent || !(param.MineClosed || param.MineMaximal))
{
return;
}
var rDi = fRecorder.GetFanout1FrequentsAtDepth(depth);
rDi.Sort();
var dic = new Dictionary <NodeSymbol, List <PatternTree> >();
foreach (var t in rDi)
{
if (t.Is2Pattern)
{
continue;
}
var key = t.FirstSymbol + "," + t.SecondSymbol;
if (!dic.ContainsKey(key))
{
dic.Add(key, new List <PatternTree>());
}
dic[key].Add(t);
}
foreach (var fpSet in dic)
{
var keysRedundant = new HashSet <string>();
for (var i = 0; i < fpSet.Value.Count; i++)
{
var ti = fpSet.Value[i];
for (var j = 0; j < fpSet.Value.Count; j++)
{
var tj = fpSet.Value[j];
if (i == j)
{
continue;
}
if (ti.Size >= tj.Size || ti.TransactionSupport != tj.TransactionSupport || ti.RootSupport != tj.RootSupport)
{
continue;
}
if (!ti.IsSuperPattern(tj, depth))
{
continue;
}
var maxDif = (param.SupportType == SupportType.Transaction)
? param.ThresholdTransaction : param.ThresholdRoot;
if (ti.NumberOfRightMostOcc - tj.NumberOfRightMostOcc >= maxDif)
{
continue;
}
keysRedundant.Add(ti.PreorderString);
break;
}
}
fRecorder.RemoveRedundantForClosed(keysRedundant);
Debug.WriteLine("Depth:{0} RemoveRedundantForClosed Number={1}", depth, keysRedundant.Count);
}
}
internal OnePatternTree(IList <NodeSymbol> preorderRepresentation, bool singleChild, MiningParams miningParams)
: base(preorderRepresentation, singleChild, miningParams)
{
}
