}

	if modified {
		if len(submap) == 0 {
			delete(j.entries, key)
		} else {
			j.entries[key] = submap
		}
	}
}

// canonicalHost strips port from host if present and returns the canonicalized
// host name.
func canonicalHost(host string) (string, error) {
	var err error
	if hasPort(host) {
		host, _, err = net.SplitHostPort(host)
		if err != nil {
			return "", err
		}
	}

	"uk":                  "uk",
	"192.168.0.5":         "192.168.0.5",
	"www.buggy.psl":       "www.buggy.psl",
	"www2.buggy.psl":      "buggy.psl",
	// The following are actual outputs of canonicalHost for
	// malformed inputs to canonicalHost (see above).
	"":              "",
	".":             ".",
	"..":            ".",
	".net":          ".net",
	"a.":            "a.",
	"b.a.":          "a.",
	"weird.stuff..": ".",

        }
        return new RelativeFileNameTransformer(file, file);
    }

    @Override
    public String transform(File file) {
        String canonicalRoot;
        String canonicalFrom;
        String canonicalTo;
        try {
            canonicalRoot = rootDir.getCanonicalPath();
            canonicalFrom = currentDir.getCanonicalPath();
            canonicalTo = file.getCanonicalPath();