static String normalize()

in src/main/java/org/apache/sling/commons/jcr/file/internal/PathUtil.java [44:113]
56 lines of code
20 McCabe index (conditional complexity)

    static String normalize(@NotNull String path) {

        // don't care for empty paths
        if (path.length() == 0) {
            return path;
        }

        // prepare the path buffer with trailing slash (simplifies impl)
        int absOffset = (path.charAt(0) == '/') ? 0 : 1;
        char[] buf = new char[path.length() + 1 + absOffset];
        if (absOffset == 1) {
            buf[0] = '/';
        }
        path.getChars(0, path.length(), buf, absOffset);
        buf[buf.length - 1] = '/';

        int lastSlash = 0; // last slash in path
        int numDots = 0; // number of consecutive dots after last slash

        int bufPos = 0;
        for (int bufIdx = lastSlash; bufIdx < buf.length; bufIdx++) {
            char c = buf[bufIdx];
            if (c == '/') {
                if (numDots == 2) {
                    if (bufPos == 0) {
                        return null;
                    }

                    do {
                        bufPos--;
                    } while (bufPos > 0 && buf[bufPos] != '/');
                }

                lastSlash = bufIdx;
                numDots = 0;
            } else if (c == '.' && useDot(buf, bufIdx) && numDots < 2) {
                numDots++;
            } else {
                // find the next slash
                int nextSlash = bufIdx + 1;
                while (nextSlash < buf.length && buf[nextSlash] != '/') {
                    nextSlash++;
                }

                // append up to the next slash (or end of path)
                if (bufPos < lastSlash) {
                    int segLen = nextSlash - bufIdx + 1;
                    System.arraycopy(buf, lastSlash, buf, bufPos, segLen);
                    bufPos += segLen;
                } else {
                    bufPos = nextSlash;
                }

                numDots = 0;
                lastSlash = nextSlash;
                bufIdx = nextSlash;
            }
        }

        String resolved;
        if (bufPos == 0 && numDots == 0) {
            resolved = (absOffset == 0) ? "/" : "";
        } else if ((bufPos - absOffset) == path.length()) {
            resolved = path;
        } else {
            resolved = new String(buf, absOffset, bufPos - absOffset);
        }

        return resolved;
    }