private XLog[] createdXFolds() {
if (log.size() < fold) fold = log.size();
XLog[] logs = new XLog[fold];
for (int i = 0; i < fold; i++) {
logs[i] = factory.createLog(log.getAttributes());
}
if (log.size() == fold) {
int pos = 0;
for (XTrace t : log) {
logs[pos].add(t);
pos++;
}
} else {
boolean finish = false;
while (!finish) {
finish = true;
for (XTrace t : log) {
int pos = r.nextInt(fold);
logs[pos].add(t);
}
for (int i = 0; i < logs.length; i++) {
if (logs[i].size() == 0) {
finish = false;
}
}
if (!finish) {
for (int i = 0; i < fold; i++) {
logs[i].clear();
}
}
}
}
return logs;
}
@Override
public Measure computeMeasurement(
UIPluginContext pluginContext,
XEventClassifier xEventClassifier,
PetrinetWithMarking petrinetWithMarking,
MiningAlgorithm miningAlgorithm,
XLog log) {
Measure measure = new Measure();
double fitness = 0.0;
this.log = log;
XLog[] logs = createdXFolds();
AlignmentBasedFitness alignmentBasedFitness = new AlignmentBasedFitness();
for (int i = 0; i < fold; i++) {
XLog log1 = factory.createLog(log.getAttributes());
for (int j = 0; j < fold; j++) {
if (j != i) {
log1.addAll(logs[j]);
}
}
try {
petrinetWithMarking = miningAlgorithm.minePetrinet(pluginContext, log1, false);
Double f =
alignmentBasedFitness
.computeMeasurement(
pluginContext, xEventClassifier, petrinetWithMarking, miningAlgorithm, logs[i])
.getValue();
fitness += (f != null) ? f : 0.0;
} catch (Exception e) {
return measure;
}
}
measure.setValue(fitness / (double) fold);
return measure;
}