/** Creates a new holder for sliding-window instances. */
public CompactCandidateSegmentGroup(FeatureFactory factory, CandidateSegmentGroup group) {
// The length of the original sequence
this.sequenceLength = group.getSequenceLength();
// The maximum length of any sliding window
this.maxWindowSize = group.getMaxWindowSize();
this.totalSize = group.size();
this.classNameSet = group.classNameSet();
this.subPopId = group.getSubpopulationId();
unitInstance = new Instance[sequenceLength];
delta = new Delta[sequenceLength][maxWindowSize];
label = new ClassLabel[sequenceLength][maxWindowSize];
segmentSource = new Object[sequenceLength][maxWindowSize];
for (int i = 0; i < sequenceLength; i++) {
unitInstance[i] = factory.compress(group.getSubsequenceInstance(i, i + 1));
}
for (int i = 0; i < sequenceLength; i++) {
for (int j = i + 1; j - i <= maxWindowSize; j++) {
if (group.getSubsequenceInstance(i, j) != null) {
label[i][j - i - 1] = group.getSubsequenceLabel(i, j);
segmentSource[i][j - i - 1] = group.getSubsequenceInstance(i, j).getSource();
delta[i][j - i - 1] = new Delta(factory, i, j, group.getSubsequenceInstance(i, j));
}
}
}
}
public Delta(FeatureFactory factory, int start, int end, Instance segmentInstance) {
for (Iterator<Feature> i = featureSet(start, end, segmentInstance).iterator();
i.hasNext(); ) {
Feature f = i.next();
// replace the feature with its canonical version, so
// that variant versions are not stored in the
// deltaWeight, zeroWeights hash tables
f = factory.getFeature(f);
double segmentWeight = segmentInstance.getWeight(f);
if (segmentWeight == 0) zeroWeights.add(f);
else {
double sumWeight = getSumWeight(start, end, f);
if (segmentWeight != sumWeight) deltaWeight.put(f, segmentWeight - sumWeight);
}
}
/*
System.out.println("segmentInstance: "+segmentInstance);
System.out.println("deltaInstance: "+new DeltaInstance(start,end,this,
segmentInstance.getSource(),
segmentInstance.getSubpopulationId()));
*/
}