Tnsresolve

private Map parse(String text) {
String clean = text.replaceAll("(?m)#.*$", "");
Map result = new LinkedHashMap<>();

int position = 0;

while (position < clean.length()) {
    int equals = clean.indexOf('=', position);

    if (equals < 0) {
        break;
    }

    int lineStart = clean.lastIndexOf('\n', equals);
    String alias = clean.substring(lineStart + 1, equals).trim();

    int start = equals + 1;

    while (start < clean.length() && Character.isWhitespace(clean.charAt(start))) {
        start++;
    }

    // Ignore non-TNS lines such as IFILE=value.
    if (!alias.matches("[A-Za-z0-9_.-]+")
            || start >= clean.length()
            || clean.charAt(start) != '(') {
        position = equals + 1;
        continue;
    }

    int depth = 0;
    boolean quoted = false;
    int end = start;

    while (end < clean.length()) {
        char c = clean.charAt(end);

        if (c == '"') {
            quoted = !quoted;
        }

        if (!quoted) {
            if (c == '(') {
                depth++;
            } else if (c == ')') {
                depth--;

                if (depth == 0) {
                    end++;
                    break;
                }
            }
        }

        end++;
    }

    if (depth != 0) {
        throw new IllegalArgumentException("Unbalanced TNS description for alias: " + alias);
    }

    if (result.putIfAbsent(alias, clean.substring(start, end)) != null) {
        throw new IllegalArgumentException("Duplicate TNS alias: " + alias);
    }

    position = end;
}

if (result.isEmpty()) {
    throw new IllegalArgumentException("No valid TNS aliases were found.");
}

return result;

}