Keyclope用户联合和动态角色

我正在使用此指南 http://www.keycloak.org/docs/3.2/server_development/topics/user-storage.html 配置用户联合。这很好,我的用户可以登录。

我的用户存储在Mysql数据库中。用户有不同的角色-也存储在mysql中。

我已经实现了getUserXXX方法

例如

@Override
public UserModel getUserByEmail(String email, RealmModel realm) {
    LOGGER.info("LOADING BY EMAIL");
    try (Connection connection = ds.getConnection()) {
        try (PreparedStatement statement = connection.prepareStatement("select * from user where email = ?")) {
            statement.setString(1, email);
            try (ResultSet rs = statement.executeQuery()) {
                if (rs.next()) {
                    UserEntity user = new UserEntity();
                    user.setEmail(rs.getString("email"));
                    user.setId(rs.getString("email"));
                    user.setPassword(rs.getString("password"));
                    return new UserAdapter(session, realm, model, user);
                }
            }
        }
    } catch (SQLException ex) {
        LOGGER.error(ex.getMessage(), ex);
    }

    return null;

}

现在,我想为每个登录的用户添加特定的角色。我该怎么做?

My UserAdapter扩展了AbstractUserAdapterFederatedStorage