private SoftLocationXRefs getBaseLocations()

in core/src/main/java/com/jetbrains/sa/jdi/ConcreteMethodImpl.java [157:223]
48 lines of code
11 McCabe index (conditional complexity)

    private SoftLocationXRefs getBaseLocations() {
        SoftLocationXRefs info = (softBaseLocationXRefsRef == null) ? null : softBaseLocationXRefsRef.get();
        if (info != null) {
            return info;
        }

        byte[] codeBuf = bytecodes();
        firstIndex = 0;
        lastIndex = codeBuf.length - 1;

        boolean hasLineInfo = saMethod.hasLineNumberTable();
        LineNumberTableElement[] lntab = null;
        int count;

        if (hasLineInfo) {
            lntab = saMethod.getLineNumberTable();
            count = lntab.length;
        } else {
            count = 0;
        }

        List<LocationImpl> lineLocations = new ArrayList<LocationImpl>(count);
        Map<Integer, List<LocationImpl>> lineMapper = new HashMap<Integer, List<LocationImpl>>();
        int lowestLine = -1;
        int highestLine = -1;
        for (int i = 0; i < count; i++) {
            long bci = lntab[i].getStartBCI();
            int lineNumber = lntab[i].getLineNumber();

            /*
             * Some compilers will point multiple consecutive
             * lines at the same location. We need to choose
             * one of them so that we can consistently map back
             * and forth between line and location. So we choose
             * to record only the last line entry at a particular
             * location.
             */
            if ((i + 1 == count) || (bci != lntab[i+1].getStartBCI())) {
                // Remember the largest/smallest line number
                if (lineNumber > highestLine) {
                    highestLine = lineNumber;
                }
                if ((lineNumber < lowestLine) || (lowestLine == -1)) {
                    lowestLine = lineNumber;
                }
                LocationImpl loc = new LocationImpl(this, bci);
                loc.addBaseLineInfo(
                    new BaseLineInfo(lineNumber, declaringType));

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

                // Add to the line -> locations map
                Integer key = lineNumber;
                List<LocationImpl> mappedLocs = lineMapper.get(key);
                if (mappedLocs == null) {
                    mappedLocs = new ArrayList<LocationImpl>(1);
                    lineMapper.put(key, mappedLocs);
                }
                mappedLocs.add(loc);
            }
        }

        info = new SoftLocationXRefs(SDE.BASE_STRATUM_NAME, lineMapper, lineLocations, lowestLine, highestLine);
        softBaseLocationXRefsRef = new SoftReference<SoftLocationXRefs>(info);
        return info;
    }