private SoftLocationXRefs getLocations()

in src/main/java/com/jetbrains/jdi/ConcreteMethodImpl.java [334:396]
49 lines of code
12 McCabe index (conditional complexity)

    private SoftLocationXRefs getLocations(SDE.Stratum stratum) {
        if (stratum.isJava()) {
            return getBaseLocations();
        }
        String stratumID = stratum.id();
        SoftLocationXRefs info =
            (softOtherLocationXRefsRef == null) ? null :
               softOtherLocationXRefsRef.get();
        if (info != null && info.stratumID.equals(stratumID)) {
            return info;
        }

        List<Location> lineLocations = new ArrayList<>();
        Map<Integer, List<Location>> lineMapper = new HashMap<>();
        int lowestLine = -1;
        int highestLine = -1;
        SDE.LineStratum lastLineStratum = null;
        SDE.Stratum baseStratum = declaringType.stratum(SDE.BASE_STRATUM_NAME);
        for (Location lineLocation : getBaseLocations().lineLocations) {
            LocationImpl loc = (LocationImpl) lineLocation;
            int baseLineNumber = loc.lineNumber(baseStratum);
            SDE.LineStratum lineStratum =
                    stratum.lineStratum(declaringType, baseLineNumber);

            if (lineStratum == null) {
                // location not mapped in this stratum
                continue;
            }

            int lineNumber = lineStratum.lineNumber();

            // remove unmapped and dup lines
            if ((lineNumber != -1) &&
                    (!lineStratum.equals(lastLineStratum))) {
                lastLineStratum = lineStratum;

                // Remember the largest/smallest line number
                if (lineNumber > highestLine) {
                    highestLine = lineNumber;
                }
                if ((lineNumber < lowestLine) || (lowestLine == -1)) {
                    lowestLine = lineNumber;
                }

                loc.addStratumLineInfo(
                        new StratumLineInfo(stratumID,
                                lineNumber,
                                lineStratum.sourceName(),
                                lineStratum.sourcePath()));

                // Add to the location list
                lineLocations.add(loc);

                // Add to the line -> locations map
                lineMapper.computeIfAbsent(lineNumber, k -> new ArrayList<>(1)).add(loc);
            }
        }

        info = new SoftLocationXRefs(stratumID, lineMapper, lineLocations,
                                     lowestLine, highestLine);
        softOtherLocationXRefsRef = vm.createSoftReference(info);
        return info;
    }