public static Alignment getJoinedMapping(Alignment[] mappings, double[] weights)
throws PCFException, CorrespondenceException {
if (mappings.length != weights.length) {
throw new PCFException(
PCFException.INVALID_PARAM_COMBINATION,
"in a mapping join operation you need the same number of mappings and weights");
}
HashMap<Correspondence, Double> hashedConfidences = new HashMap<Correspondence, Double>();
for (int m = 0; m < mappings.length; m++) {
double weight = weights[m];
for (Correspondence c : mappings[m]) {
if (hashedConfidences.containsKey(c)) {
hashedConfidences.put(c, c.getConfidence() * weight + hashedConfidences.get(c));
} else {
hashedConfidences.put(c, c.getConfidence() * weight);
}
}
}
Alignment joinedMapping = new Alignment();
for (Correspondence c : hashedConfidences.keySet()) {
c.setConfidence(hashedConfidences.get(c));
joinedMapping.push(c);
}
return joinedMapping;
}
/**
* Creates and returns a copy of this mapping. Te copy has ist own list of correspondences, but
* contains references to the same correspondences as are referred to be this mapping.
*
* @return A copy of this mapping.
*/
public Alignment getCopy() {
Alignment copy = new Alignment();
for (Correspondence c : this) {
copy.push(c);
}
if (this.idPattern != null) {
copy.idPattern = new boolean[this.idPattern.length];
for (int i = 0; i < this.idPattern.length; i++) {
copy.idPattern[i] = this.idPattern[i];
}
}
return copy;
}
