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/*
 Copyright 2017 esbtools Contributors and/or its affiliates.

 This file is part of esbtools.

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see .
 */
package org.esbtools.auth.util;

import java.util.Set;

/**
 * Roles provider.
 *
 * @author mpatercz
 *
 */
public interface RolesProvider {

    /**
     * Get roles for given user.
     *
     * @param username The user name to get roles for
     * @return A set of roles. If no roles are found, returns an empty set. Never returns null.
     * @throws Exception if any issue is encounter while acquiring the roles
     */
    public Set getUserRoles(String username) throws Exception;

}