/**
* Compare the distance values to allow sorting in a tree map. If the distance value is the same,
* but the document is different, the index number within the index is used to distinguishing the
* results. Otherwise the TreeMap implementation wouldn't add the result.
*
* @param o the SimpleResult to compare the current one to.
* @return -1, 0, or 1
*/
public int compareTo(SimpleResult o) {
int compareValue = (int) Math.signum(distance - ((SimpleResult) o).distance);
if (compareValue == 0 && !document.equals(o.document)) {
return (int) Math.signum(indexNumber - o.indexNumber);
}
return compareValue;
}
@Override
public boolean equals(Object obj) {
// it's not the same if it's not the same class.
if (!(obj instanceof SimpleResult)) return false;
// it's the same if the document is the same, regardless of the distance.
else
return (document.equals(((SimpleResult) obj).document)
&& indexNumber == ((SimpleResult) obj).indexNumber);
}