/**
* Load the directed graph from the given file
*
* @param fileName the file to load the cart from
* @param featDefinition the feature definition
* @param dummy unused, just here for compatibility with the FeatureFileIndexer.
* @throws IOException , {@link MaryConfigurationException} if a problem occurs while loading
*/
public DirectedGraph load(InputStream inStream) throws IOException, MaryConfigurationException {
BufferedInputStream buffInStream = new BufferedInputStream(inStream);
assert buffInStream.markSupported();
buffInStream.mark(10000);
// open the CART-File and read the header
DataInput raf = new DataInputStream(buffInStream);
MaryHeader maryHeader = new MaryHeader(raf);
if (!maryHeader.hasCurrentVersion()) {
throw new IOException("Wrong version of database file");
}
if (maryHeader.getType() != MaryHeader.DIRECTED_GRAPH) {
if (maryHeader.getType() == MaryHeader.CARTS) {
buffInStream.reset();
return new MaryCARTReader().loadFromStream(buffInStream);
} else {
throw new IOException("Not a directed graph file");
}
}
// Read properties
short propDataLength = raf.readShort();
Properties props;
if (propDataLength == 0) {
props = null;
} else {
byte[] propsData = new byte[propDataLength];
raf.readFully(propsData);
ByteArrayInputStream bais = new ByteArrayInputStream(propsData);
props = new Properties();
props.load(bais);
bais.close();
}
// Read the feature definition
FeatureDefinition featureDefinition = new FeatureDefinition(raf);
// read the decision nodes
int numDecNodes = raf.readInt(); // number of decision nodes
// First we need to read all nodes into memory, then we can link them properly
// in terms of parent/child.
DecisionNode[] dns = new DecisionNode[numDecNodes];
int[][] childIndexes = new int[numDecNodes][];
for (int i = 0; i < numDecNodes; i++) {
// read one decision node
int featureNameIndex = raf.readInt();
int nodeTypeNr = raf.readInt();
DecisionNode.Type nodeType = DecisionNode.Type.values()[nodeTypeNr];
int numChildren = 2; // for binary nodes
switch (nodeType) {
case BinaryByteDecisionNode:
int criterion = raf.readInt();
dns[i] =
new DecisionNode.BinaryByteDecisionNode(
featureNameIndex, (byte) criterion, featureDefinition);
break;
case BinaryShortDecisionNode:
criterion = raf.readInt();
dns[i] =
new DecisionNode.BinaryShortDecisionNode(
featureNameIndex, (short) criterion, featureDefinition);
break;
case BinaryFloatDecisionNode:
float floatCriterion = raf.readFloat();
dns[i] =
new DecisionNode.BinaryFloatDecisionNode(
featureNameIndex, floatCriterion, featureDefinition);
break;
case ByteDecisionNode:
numChildren = raf.readInt();
if (featureDefinition.getNumberOfValues(featureNameIndex) != numChildren) {
throw new IOException(
"Inconsistent cart file: feature "
+ featureDefinition.getFeatureName(featureNameIndex)
+ " should have "
+ featureDefinition.getNumberOfValues(featureNameIndex)
+ " values, but decision node "
+ i
+ " has only "
+ numChildren
+ " child nodes");
}
dns[i] =
new DecisionNode.ByteDecisionNode(featureNameIndex, numChildren, featureDefinition);
break;
case ShortDecisionNode:
numChildren = raf.readInt();
if (featureDefinition.getNumberOfValues(featureNameIndex) != numChildren) {
throw new IOException(
"Inconsistent cart file: feature "
+ featureDefinition.getFeatureName(featureNameIndex)
+ " should have "
+ featureDefinition.getNumberOfValues(featureNameIndex)
+ " values, but decision node "
+ i
+ " has only "
+ numChildren
+ " child nodes");
}
dns[i] =
new DecisionNode.ShortDecisionNode(featureNameIndex, numChildren, featureDefinition);
}
dns[i].setUniqueDecisionNodeId(i + 1);
// now read the children, indexes only:
childIndexes[i] = new int[numChildren];
for (int k = 0; k < numChildren; k++) {
childIndexes[i][k] = raf.readInt();
}
}
// read the leaves
int numLeafNodes = raf.readInt(); // number of leaves, it does not include empty leaves
LeafNode[] lns = new LeafNode[numLeafNodes];
for (int j = 0; j < numLeafNodes; j++) {
// read one leaf node
int leafTypeNr = raf.readInt();
LeafNode.LeafType leafNodeType = LeafNode.LeafType.values()[leafTypeNr];
switch (leafNodeType) {
case IntArrayLeafNode:
int numData = raf.readInt();
int[] data = new int[numData];
for (int d = 0; d < numData; d++) {
data[d] = raf.readInt();
}
lns[j] = new LeafNode.IntArrayLeafNode(data);
break;
case FloatLeafNode:
float stddev = raf.readFloat();
float mean = raf.readFloat();
lns[j] = new LeafNode.FloatLeafNode(new float[] {stddev, mean});
break;
case IntAndFloatArrayLeafNode:
case StringAndFloatLeafNode:
int numPairs = raf.readInt();
int[] ints = new int[numPairs];
float[] floats = new float[numPairs];
for (int d = 0; d < numPairs; d++) {
ints[d] = raf.readInt();
floats[d] = raf.readFloat();
}
if (leafNodeType == LeafNode.LeafType.IntAndFloatArrayLeafNode)
lns[j] = new LeafNode.IntAndFloatArrayLeafNode(ints, floats);
else lns[j] = new LeafNode.StringAndFloatLeafNode(ints, floats);
break;
case FeatureVectorLeafNode:
throw new IllegalArgumentException(
"Reading feature vector leaf nodes is not yet implemented");
case PdfLeafNode:
throw new IllegalArgumentException("Reading pdf leaf nodes is not yet implemented");
}
lns[j].setUniqueLeafId(j + 1);
}
// Graph nodes
int numDirectedGraphNodes = raf.readInt();
DirectedGraphNode[] graphNodes = new DirectedGraphNode[numDirectedGraphNodes];
int[] dgnLeafIndices = new int[numDirectedGraphNodes];
int[] dgnDecIndices = new int[numDirectedGraphNodes];
for (int g = 0; g < numDirectedGraphNodes; g++) {
graphNodes[g] = new DirectedGraphNode(null, null);
graphNodes[g].setUniqueGraphNodeID(g + 1);
dgnLeafIndices[g] = raf.readInt();
dgnDecIndices[g] = raf.readInt();
}
// Now, link up the decision nodes with their daughters
for (int i = 0; i < numDecNodes; i++) {
// System.out.print(dns[i]+" "+dns[i].getFeatureName()+" ");
for (int k = 0; k < childIndexes[i].length; k++) {
Node child = childIndexToNode(childIndexes[i][k], dns, lns, graphNodes);
dns[i].addDaughter(child);
// System.out.print(" "+dns[i].getDaughter(k));
}
// System.out.println();
}
// And link up directed graph nodes
for (int g = 0; g < numDirectedGraphNodes; g++) {
Node leaf = childIndexToNode(dgnLeafIndices[g], dns, lns, graphNodes);
graphNodes[g].setLeafNode(leaf);
Node dec = childIndexToNode(dgnDecIndices[g], dns, lns, graphNodes);
if (dec != null && !dec.isDecisionNode())
throw new IllegalArgumentException("Only decision nodes allowed, read " + dec.getClass());
graphNodes[g].setDecisionNode((DecisionNode) dec);
// System.out.println("Graph node "+(g+1)+", leaf: "+Integer.toHexString(dgnLeafIndices[g])+",
// "+leaf+" -- dec: "+Integer.toHexString(dgnDecIndices[g])+", "+dec);
}
Node rootNode;
if (graphNodes.length > 0) {
rootNode = graphNodes[0];
} else if (dns.length > 0) {
rootNode = dns[0];
// CART behaviour, not sure if this is needed:
// Now count all data once, so that getNumberOfData()
// will return the correct figure.
((DecisionNode) rootNode).countData();
} else if (lns.length > 0) {
rootNode = lns[0]; // single-leaf tree...
} else {
rootNode = null;
}
// set the rootNode as the rootNode of cart
return new DirectedGraph(rootNode, featureDefinition, props);
}
@Override
protected void loadFromByteBuffer(String fileName)
throws IOException, MaryConfigurationException {
/* Open the file */
FileInputStream fis = new FileInputStream(fileName);
FileChannel fc = fis.getChannel();
ByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
fis.close();
/* Load the Mary header */
hdr = new MaryHeader(bb);
if (hdr.getType() != MaryHeader.HALFPHONE_UNITFEATS) {
throw new MaryConfigurationException(
"File [" + fileName + "] is not a valid Mary Halfphone Features file.");
}
leftWeights = new FeatureDefinition(bb);
rightWeights = new FeatureDefinition(bb);
assert leftWeights.featureEquals(rightWeights)
: "Halfphone unit feature file contains incompatible feature definitions for left and right units -- this should not happen!";
featureDefinition = leftWeights; // one of them, for super class
int numberOfUnits = bb.getInt();
featureVectors = new FeatureVector[numberOfUnits];
for (int i = 0; i < numberOfUnits; i++) {
featureVectors[i] = featureDefinition.readFeatureVector(i, bb);
}
}
/**
* Get the theoretical number of leaves, given a feature sequence.
*
* @return The number of leaves, or -1 if the capacity of the long integer was blown.
*/
public long getTheoreticalNumberOfLeaves(int[] feaSeq) {
long ret = 1;
for (int i = 0; i < feaSeq.length; i++) {
// System.out.println( "Feature [" + i + "] has [" +
// featureDefinition.getNumberOfValues( featureSequence[i] ) + "] values."
// + "(Number of leaves = [" + ret + "].)" );
ret *= featureDefinition.getNumberOfValues(feaSeq[i]);
if (ret < 0) return (-1);
}
return (ret);
}
public TrainedLTS(AllophoneSet aPhonSet, CART predictionTree) {
this.allophoneSet = aPhonSet;
this.tree = predictionTree;
this.featureDefinition = tree.getFeatureDefinition();
this.indexPredictedFeature = featureDefinition.getFeatureIndex(PREDICTED_STRING_FEATURENAME);
Properties props = tree.getProperties();
if (props == null)
throw new IllegalArgumentException("Prediction tree does not contain properties");
convertToLowercase = Boolean.parseBoolean(props.getProperty("lowercase"));
context = Integer.parseInt(props.getProperty("context"));
}
/**
* Convenience method to load tree from an inputstream
*
* @param treeStream
* @throws IOException
*/
public void loadTree(InputStream treeStream) throws IOException, MaryConfigurationException {
MaryCARTReader cartReader = new MaryCARTReader();
this.tree = cartReader.loadFromStream(treeStream);
this.featureDefinition = tree.getFeatureDefinition();
this.indexPredictedFeature = featureDefinition.getFeatureIndex(PREDICTED_STRING_FEATURENAME);
this.convertToLowercase = false;
Properties props = tree.getProperties();
if (props == null)
throw new IllegalArgumentException("Prediction tree does not contain properties");
convertToLowercase = Boolean.parseBoolean(props.getProperty("lowercase"));
context = Integer.parseInt(props.getProperty("context"));
}
private void dumpFeatureVectors() throws IOException {
// open file
PrintWriter out = new PrintWriter(new BufferedOutputStream(new FileOutputStream(featFile)));
for (int i = 0; i < fv.length; i++) {
// Print the feature string
out.print(i + " " + featureDefinition.toFeatureString(fv[i]));
// print a newline if this is not the last vector
if (i + 1 != fv.length) {
out.print("\n");
}
}
// dump and close
out.flush();
out.close();
}
/**
* Load SoP data.
*
* @throws IOException if data can not be read.
*/
@Override
protected void loadData() throws IOException {
sopModels = new HashMap<String, SoP>();
String nextLine, nextType;
String strContext = "";
Scanner s = null;
try {
s = new Scanner(new BufferedReader(new InputStreamReader(dataStream, "UTF-8")));
// The first part contains the feature definition
while (s.hasNext()) {
nextLine = s.nextLine();
if (nextLine.trim().equals("")) break;
else strContext += nextLine + "\n";
}
// the featureDefinition is the same for vowel, consonant and Pause
FeatureDefinition sopFeatureDefinition =
new FeatureDefinition(new BufferedReader(new StringReader(strContext)), false);
predictionFeatureNames = sopFeatureDefinition.getFeatureNames();
while (s.hasNext()) {
nextType = s.nextLine();
nextLine = s.nextLine();
if (nextType.startsWith("f0")) {
sopModels.put("f0", new SoP(nextLine, sopFeatureDefinition));
} else {
sopModels.put(nextType, new SoP(nextLine, sopFeatureDefinition));
}
}
s.close();
} catch (Exception e) {
throw new IOException("Error reading SoP data", e);
}
}
/**
* A local sort at a particular node along the deep sorting operation. This is a recursive
* function.
*
* @param currentFeatureIdx The currently tested feature.
* @param currentNode The current node, holding the currently processed zone in the array of
* feature vectors.
*/
private void sortNode(int currentFeatureIdx, MaryNode currentNode) {
/* If we have reached a leaf, do a final sort according to the unit index and return: */
if (currentFeatureIdx == featureSequence.length) {
Arrays.sort(featureVectors, currentNode.from, currentNode.to, cui);
numberOfLeaves++;
/*System.out.print( "LEAF ! (" + (currentNode.to-currentNode.from) + " units)" );
for ( int i = currentNode.from; i < currentNode.to; i++ ) {
System.out.print( " (" + featureVectors[i].getUnitIndex() + " 0)" );
}
System.out.println( "" );*/
return;
}
/* Else: */
int currentFeature = featureSequence[currentFeatureIdx];
FeatureVector.FeatureType featureType = featureVectors[0].getFeatureType(currentFeature);
/* Register the feature currently used for the splitting */
currentNode.setFeatureIndex(currentFeature);
/* Perform the sorting according to the currently considered feature: */
/* 1) position the comparator onto the right feature */
c.setFeatureIdx(currentFeature, featureType);
/* 2) do the sorting */
Arrays.sort(featureVectors, currentNode.from, currentNode.to, c);
/* Then, seek for the zones where the feature value is the same,
* and launch the next sort level on these. */
int nVal = featureDefinition.getNumberOfValues(currentFeature);
currentNode.split(nVal);
int nextFrom = currentNode.from;
int nextTo = currentNode.from;
for (int i = 0; i < nVal; i++) {
nextFrom = nextTo;
// System.out.print( "Next node begins at " + nextFrom );
while ((nextTo < currentNode.to)
&& (featureVectors[nextTo].getFeatureAsInt(currentFeature) == i)) {
// System.out.print( " " + featureVectors[nextTo].getFeatureAsInt( currentFeature ) );
nextTo++;
}
// System.out.println( " and ends at " + nextTo + " for a total of " + (nextTo-nextFrom) + "
// units." );
if ((nextTo - nextFrom) != 0) {
MaryNode nod = new MaryNode(nextFrom, nextTo);
currentNode.setChild(i, nod);
// System.out.print("(" + i + " isByteOf " + currentFeature + ")" );
sortNode(currentFeatureIdx + 1, nod);
} else currentNode.setChild(i, null);
}
}
@Override
protected void loadFromStream(String fileName) throws IOException, MaryConfigurationException {
/* Open the file */
DataInputStream dis = null;
dis = new DataInputStream(new BufferedInputStream(new FileInputStream(fileName)));
/* Load the Mary header */
hdr = new MaryHeader(dis);
if (hdr.getType() != MaryHeader.HALFPHONE_UNITFEATS) {
throw new IOException("File [" + fileName + "] is not a valid Mary Halfphone Features file.");
}
leftWeights = new FeatureDefinition(dis);
rightWeights = new FeatureDefinition(dis);
assert leftWeights.featureEquals(rightWeights)
: "Halfphone unit feature file contains incompatible feature definitions for left and right units -- this should not happen!";
featureDefinition = leftWeights; // one of them, for super class
int numberOfUnits = dis.readInt();
featureVectors = new FeatureVector[numberOfUnits];
for (int i = 0; i < numberOfUnits; i++) {
featureVectors[i] = featureDefinition.readFeatureVector(i, dis);
}
}
/**
* Export this feature definition in the "all.desc" format which can be read by wagon.
*
* @param out the destination of the data
* @param featuresToIgnore a set of Strings containing the names of features that wagon should
* ignore. Can be null.
*/
private void createDescFile() throws IOException {
PrintWriter out = new PrintWriter(new FileOutputStream(descFile));
Set<String> featuresToIgnore = new HashSet<String>();
featuresToIgnore.add("unit_logf0");
featuresToIgnore.add("unit_duration");
int numDiscreteFeatures =
featureDefinition.getNumberOfByteFeatures() + featureDefinition.getNumberOfShortFeatures();
out.println("(");
out.println("(occurid cluster)");
for (int i = 0, n = featureDefinition.getNumberOfFeatures(); i < n; i++) {
out.print("( ");
String featureName = featureDefinition.getFeatureName(i);
out.print(featureName);
if (featuresToIgnore != null && featuresToIgnore.contains(featureName)) {
out.print(" ignore");
}
if (i < numDiscreteFeatures) { // list values
for (int v = 0, vmax = featureDefinition.getNumberOfValues(i); v < vmax; v++) {
out.print(" ");
// Print values surrounded by double quotes, and make sure any
// double quotes in the value are preceded by a backslash --
// otherwise, we get problems e.g. for sentence_punc
String val = featureDefinition.getFeatureValueAsString(i, v);
if (val.indexOf('"') != -1) {
StringBuilder buf = new StringBuilder();
for (int c = 0; c < val.length(); c++) {
char ch = val.charAt(c);
if (ch == '"') buf.append("\\\"");
else buf.append(ch);
}
val = buf.toString();
}
out.print("\"" + val + "\"");
}
out.println(" )");
} else { // float feature
out.println(" float )");
}
}
out.println(")");
out.close();
}
/**
* Launches a deep sort on the array of feature vectors. This is public because it can be used to
* re-index the previously read feature file.
*
* @param featureIdx An array of feature names, indicating the sequence of features according to
* which the sorting should be performed.
*/
public void deepSort(String[] setFeatureSequence) {
featureSequence = featureDefinition.getFeatureIndexArray(setFeatureSequence);
numberOfLeaves = 0;
tree = new MaryNode(0, featureVectors.length);
sortNode(0, tree);
}
/**
* Create a utterance model list from feature vectors predicted from elements.
*
* @param predictFromElements elements from MaryXML from where to get feature vectors.
* @return Utterance model um containing state durations and pdfs already searched on the trees to
* generate F0.
* @throws MaryConfigurationException if error searching in HMM trees.
*/
private HTSUttModel createUttModel(List<Element> predictFromElements)
throws MaryConfigurationException {
int i, k, s, t, mstate, frame, durInFrames, durStateInFrames, numVoicedInModel;
HTSModel m;
List<Element> predictorElements = predictFromElements;
List<Target> predictorTargets = getTargets(predictorElements);
FeatureVector fv;
HTSUttModel um = new HTSUttModel();
FeatureDefinition feaDef = htsData.getFeatureDefinition();
float duration;
double diffdurOld = 0.0;
double diffdurNew = 0.0;
float f0s[] = null;
try {
// (1) Predict the values
for (i = 0; i < predictorTargets.size(); i++) {
fv = predictorTargets.get(i).getFeatureVector();
Element e = predictFromElements.get(i);
um.addUttModel(new HTSModel(cart.getNumStates()));
m = um.getUttModel(i);
/* this function also sets the phone name, the phone between - and + */
m.setPhoneName(fv.getFeatureAsString(feaDef.getFeatureIndex("phone"), feaDef));
/* Check if context-dependent gv (gv without sil) */
if (htsData.getUseContextDependentGV()) {
if (m.getPhoneName().contentEquals("_")) m.setGvSwitch(false);
}
/* increment number of models in utterance model */
um.setNumModel(um.getNumModel() + 1);
/* update number of states */
um.setNumState(um.getNumState() + cart.getNumStates());
// get the duration from the element
duration = Integer.parseInt(e.getAttribute("d")) * 0.001f; // in sec.
// distribute the duration (in frames) among the five states, here it is done the same
// amount for each state
durInFrames = (int) (duration / fperiodsec);
durStateInFrames = (int) (durInFrames / cart.getNumStates());
m.setTotalDur(0); // reset to set new value according to duration
for (s = 0; s < cart.getNumStates(); s++) {
m.setDur(s, durStateInFrames);
m.setTotalDur(m.getTotalDur() + m.getDur(s));
}
um.setTotalFrame(um.getTotalFrame() + m.getTotalDur());
System.out.format(
"createUttModel: duration=%.3f sec. durInFrames=%d durStateInFrames=%d m.getTotalDur()=%d\n",
duration, durInFrames, durStateInFrames, m.getTotalDur());
/* Find pdf for LF0, this function sets the pdf for each state.
* and determines, according to the HMM models, whether the states are voiced or unvoiced, (it can be possible that some states are voiced
* and some unvoiced).*/
cart.searchLf0InCartTree(m, fv, feaDef, htsData.getUV());
for (mstate = 0; mstate < cart.getNumStates(); mstate++) {
for (frame = 0; frame < m.getDur(mstate); frame++)
if (m.getVoiced(mstate)) um.setLf0Frame(um.getLf0Frame() + 1);
}
}
return um;
} catch (Exception e) {
throw new MaryConfigurationException(
"Error searching in tree when creating utterance model. ", e);
}
}
/**
* Predict durations and state durations from predictFromElements and apply durations to
* applyToElements. A utterance model is created that contains the predicted state durations.
*
* @param predictFromElements elements to predict from
* @param applyToElements elements to apply predicted durations
* @return HTSUttModel a utterance model
* @throws MaryConfigurationException if error searching in HMM trees.
*/
private HTSUttModel predictAndSetDuration(
List<Element> predictFromElements, List<Element> applyToElements)
throws MaryConfigurationException {
List<Element> predictorElements = predictFromElements;
List<Target> predictorTargets = getTargets(predictorElements);
FeatureVector fv = null;
HTSUttModel um = new HTSUttModel();
FeatureDefinition feaDef = htsData.getFeatureDefinition();
double diffdurOld = 0.0;
double diffdurNew = 0.0;
String durAttributeName = "d";
try {
// (1) Predict the values
for (int i = 0; i < predictorTargets.size(); i++) {
fv = predictorTargets.get(i).getFeatureVector();
um.addUttModel(new HTSModel(cart.getNumStates()));
HTSModel m = um.getUttModel(i);
/* this function also sets the phone name, the phone between - and + */
m.setPhoneName(fv.getFeatureAsString(feaDef.getFeatureIndex("phone"), feaDef));
/* Check if context-dependent gv (gv without sil) */
if (htsData.getUseContextDependentGV()) {
if (m.getPhoneName().contentEquals("_")) m.setGvSwitch(false);
}
/* increment number of models in utterance model */
um.setNumModel(um.getNumModel() + 1);
/* update number of states */
um.setNumState(um.getNumState() + cart.getNumStates());
// Estimate state duration from state duration model (Gaussian)
diffdurNew = cart.searchDurInCartTree(m, fv, htsData, diffdurOld);
diffdurOld = diffdurNew;
double duration = m.getTotalDur() * fperiodsec; // in seconds
um.setTotalFrame(um.getTotalFrame() + m.getTotalDur());
// System.out.format("HMMModel: phone=%s duration=%.3f sec. m.getTotalDur()=%d\n",
// m.getPhoneName(), duration, m.getTotalDur());
/* Find pdf for LF0, this function sets the pdf for each state.
* and determines, according to the HMM models, whether the states are voiced or unvoiced, (it can be possible that some states are voiced
* and some unvoiced).*/
cart.searchLf0InCartTree(m, fv, feaDef, htsData.getUV());
for (int mstate = 0; mstate < cart.getNumStates(); mstate++) {
for (int frame = 0; frame < m.getDur(mstate); frame++)
if (m.getVoiced(mstate)) um.setLf0Frame(um.getLf0Frame() + 1);
}
// set the value in elements
Element element = applyToElements.get(i);
// "evaluate" pseudo XPath syntax:
// TODO this needs to be extended to take into account targetAttributeNames like "foo/@bar",
// which would add the
// bar attribute to the foo child of this element, creating the child if not already
// present...
if (durAttributeName.startsWith("@")) {
durAttributeName = durAttributeName.replaceFirst("@", "");
}
String formattedTargetValue = String.format(targetAttributeFormat, duration);
// System.out.println("HMMModel: formattedTargetValue = " + formattedTargetValue);
// if the attribute already exists for this element, append targetValue:
if (element.hasAttribute(durAttributeName)) {
formattedTargetValue =
element.getAttribute(durAttributeName) + " " + formattedTargetValue;
}
// set the new attribute value:
element.setAttribute(durAttributeName, formattedTargetValue);
}
return um;
} catch (Exception e) {
throw new MaryConfigurationException("Error searching in tree when predicting duration. ", e);
}
}
