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;
}
/**
* @return -1 if this is less than that which is the case if trust of this is greater than trust
* of that
*/
public int compareTo(Alignment that) {
double thisTrust = this.getConfidenceTotal();
double thatTrust = that.getConfidenceTotal();
if (thisTrust < thatTrust) {
return 1;
} else if (thisTrust == thatTrust) {
return 0;
} else {
return -1;
}
}
/**
* Returns the union of this mapping and that.
*
* @param that The mapping to be unioned with this mapping.
* @return The union of this and that.
*/
public Alignment getUnion(Alignment that) {
HashSet<Correspondence> thisCSet = this.getCorrespondencesAsSet();
HashSet<Correspondence> thatCSet = that.getCorrespondencesAsSet();
thisCSet.addAll(thatCSet);
return (new Alignment(thisCSet));
}
/**
* Returns the intersection between this mapping and that.
*
* @param that The mapping to be intersected to this mapping.
* @return The intersection bewteen this and that.
*/
public Alignment getIntersection(Alignment that) {
HashSet<Correspondence> thisCSet = this.getCorrespondencesAsSet();
HashSet<Correspondence> thatCSet = that.getCorrespondencesAsSet();
thisCSet.retainAll(thatCSet);
return (new Alignment(thisCSet));
}
/**
* Returns the set difference between this mapping and that mapping.
*
* @param that The mapping to be compared to this mapping.
* @return The set difference this without that.
*/
public Alignment getDifference(Alignment that) {
HashSet<Correspondence> thisCSet = this.getCorrespondencesAsSet();
HashSet<Correspondence> thatCSet = that.getCorrespondencesAsSet();
thisCSet.removeAll(thatCSet);
return (new Alignment(thisCSet));
}