SID sid = new SID(rpcSid, SID.SID_TYPE_ALIAS, "MYDOMAIN", "MyAlias", false);
        assertEquals("MYDOMAIN\\MyAlias", sid.toDisplayString());

        SID domainSid = new SID(rpcSid, SID.SID_TYPE_DOMAIN, "MYDOMAIN", null, true);
        assertEquals("MYDOMAIN", domainSid.toDisplayString());

        SID builtinSid = new SID(rpcSid, SID.SID_TYPE_WKN_GRP, "BUILTIN", "Administrators", false);

     */
    public SID getDomainSid() {
        return new SID(this, SID_TYPE_DOMAIN, this.domainName, null, getType() != SID_TYPE_DOMAIN);
    }

    /**
     * Gets the RID (relative identifier) of this SID.
     *
     * @return the RID
     */
    public int getRid() {
        if (getType() == SID_TYPE_DOMAIN) {
            throw new IllegalArgumentException("This SID is a domain sid");
        }

     */
    int SID_TYPE_USER = 1;

    /**
     * SID type indicating a domain group.
     */
    int SID_TYPE_DOM_GRP = 2;

    /**
     * SID type indicating a domain.
     */
    int SID_TYPE_DOMAIN = 3;

    /**
     * SID type indicating a local group or alias.
     */
    int SID_TYPE_ALIAS = 4;

    /**
     * SID type indicating a well-known group.
     */
    int SID_TYPE_WKN_GRP = 5;

    public SID getDomainSid() {
        return new SID(this, SID_TYPE_DOMAIN, this.domainName, null, getType() != SID_TYPE_DOMAIN);
    }

    /**
     * Get the RID
     *
     * This is the last subauthority identifier
     *
     * @return the RID
     */
    @Override
    public int getRid() {
        if (getType() == SID_TYPE_DOMAIN) {

            out.domainName = null;
            switch (resp.sid_type) {
            case jcifs.SID.SID_TYPE_USER:
            case jcifs.SID.SID_TYPE_DOM_GRP:
            case jcifs.SID.SID_TYPE_DOMAIN:
            case jcifs.SID.SID_TYPE_ALIAS:
            case jcifs.SID.SID_TYPE_WKN_GRP:
                final rpc.unicode_string ustr = rpc.domains.domains[resp.sid_index].name;

        assertEquals(4, SambaHelper.SID_TYPE_ALIAS);
        assertEquals(6, SambaHelper.SID_TYPE_DELETED);
        assertEquals(2, SambaHelper.SID_TYPE_DOM_GRP);
        assertEquals(3, SambaHelper.SID_TYPE_DOMAIN);
        assertEquals(7, SambaHelper.SID_TYPE_INVALID);
        assertEquals(8, SambaHelper.SID_TYPE_UNKNOWN);
        assertEquals(0, SambaHelper.SID_TYPE_USE_NONE);
        assertEquals(1, SambaHelper.SID_TYPE_USER);

    /**
     * SID type for a domain group.
     */
    public static final int SID_TYPE_DOM_GRP = 2;

    /**
     * SID type for a domain.
     */
    public static final int SID_TYPE_DOMAIN = 3;

    /**
     * SID type for an invalid SID.
     */
    public static final int SID_TYPE_INVALID = 7;

    /**
     * SID type for an unknown SID.
     */

            assertEquals("30", unknown.getAccountName());

            // Domain type: domain name as-is, account name empty
            SID domain = new SID(buildSidT((byte) 1, ident, 10, 20), jcifs.SID.SID_TYPE_DOMAIN, "MYDOM", "ignored", false);
            assertEquals("MYDOM", domain.getDomainName());
            assertEquals("", domain.getAccountName());

            // User in regular domain