@Override
public ProximityDescriptor computeProximity(Task wi1, Task wi2) {
List<CodeContext> c1 = getContextEvents(wi1);
List<CodeContext> c2 = getContextEvents(wi2);
int totaItems = 0;
int overlappingItems = 0;
Hashtable<String, OverlapItem> allElements = new Hashtable<String, OverlapItem>();
OverlapItem oi;
String elementID;
ProximityDescriptor pd = new ProximityDescriptor();
ArrayList<Task> relatedTasks = new ArrayList<Task>();
// go through the 2 working sets one by one: first one ...
relatedTasks.add(wi1);
for (CodeContext eventC1 : c1) {
if (granularity == ProximityGranularity.FILE_LEVEL) elementID = eventC1.getFileName();
else elementID = eventC1.getHandle();
if (allElements.containsKey(elementID) == false) {
oi = new OverlapItem(elementID);
allElements.put(elementID, oi);
} else oi = allElements.get(elementID);
if (eventC1.wasEdited()) oi.setEdit1(oi.getEdit1() + 1);
else oi.setSelection1(oi.getSelection1() + 1);
}
// ... and now second one
relatedTasks.add(wi2);
for (CodeContext eventC2 : c2) {
if (granularity == ProximityGranularity.FILE_LEVEL) elementID = eventC2.getFileName();
else elementID = eventC2.getHandle();
if (allElements.containsKey(elementID) == false) {
oi = new OverlapItem(elementID);
allElements.put(elementID, oi);
} else oi = allElements.get(elementID);
if (eventC2.wasEdited()) oi.setEdit1(oi.getEdit1() + 1);
else oi.setSelection1(oi.getSelection1() + 1);
}
totaItems = allElements.keySet().size();
List<OverlapItem> actualOverlaps = new ArrayList<OverlapItem>();
for (OverlapItem overlap : allElements.values()) {
if (overlap.isActualOverlap()) actualOverlaps.add(overlap);
}
overlappingItems = actualOverlaps.size();
pd.setOverlappingItems(actualOverlaps);
pd.setPreliminaryDistance(computeRawProximity(actualOverlaps));
pd.setInvolvedTasks(relatedTasks);
return pd;
}
private double computeRawProximity(List<OverlapItem> overlaps) {
double potential = 0;
double actual = 0;
for (OverlapItem item : overlaps) {
if (item.getEdit1() > 0 && item.getEdit2() > 0) {
potential += ProximityWeight.EDIT_OVERLAP.weight();
actual += ProximityWeight.EDIT_OVERLAP.weight();
} else if (item.getEdit1() > 0 || item.getEdit2() > 0) {
potential += ProximityWeight.EDIT_OVERLAP.weight();
if (item.getSelection1() > 0 && item.getSelection2() > 0)
actual += ProximityWeight.MIXED_OVERLAP.weight();
} else {
potential += ProximityWeight.SELECTION_OVERLAP.weight();
if (item.getSelection1() > 0 && item.getSelection2() > 0)
actual += ProximityWeight.SELECTION_OVERLAP.weight();
}
}
return roundProximityScore(actual / potential);
}
private int countOverlappingEvents(List<OverlapItem> overlaps) {
int overlapCount = 0;
// calculate number of overlapping events
for (OverlapItem oi : overlaps) {
overlapCount =
overlapCount
+ Math.min(oi.getEdit1(), oi.getEdit2())
+ Math.min(oi.getSelection1(), oi.getSelection2());
}
return overlapCount;
}