/** Returns a copy of this instance, also copying each SegmentInfo. */
@Override
public Object clone() {
try {
final SegmentInfos sis = (SegmentInfos) super.clone();
// deep clone, first recreate all collections:
sis.segments = new ArrayList<SegmentInfo>(size());
sis.segmentSet = new HashSet<SegmentInfo>(size());
sis.cachedUnmodifiableList = null;
sis.cachedUnmodifiableSet = null;
for (final SegmentInfo info : this) {
// dont directly access segments, use add method!!!
sis.add((SegmentInfo) info.clone());
}
sis.userData = new HashMap<String, String>(userData);
return sis;
} catch (CloneNotSupportedException e) {
throw new RuntimeException("should not happen", e);
}
}
