/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */
package org.apache.lenya.ac;

/**
 * Modifiable policy.
 */
public interface ModifiablePolicy extends Policy {

    /**
     * Sets if this policy requires SSL protection.
     * 
     * @param ssl
     *            A boolean value.
     */
    void setSSL(boolean ssl);

    /**
     * Adds a role to this policy for a certain accreditable and a certain role.
     * If a credenital exists for the accreditable, the role is added to this
     * credential. Otherwise, a new credential is created.
     * 
     * @param accreditable
     *            An accreditable.
     * @param role
     *            A role.
     * @param method
     */
    public void addRole(Accreditable accreditable, Role role, String method);

    /**
     * Removes a role from this policy for a certain accreditable and a certain
     * role.
     * 
     * @param accreditable
     *            An accreditable.
     * @param role
     *            A role.
     * @throws AccessControlException
     *             if the accreditable-role pair is not contained.
     */
    public void removeRole(Accreditable accreditable, Role role)
            throws AccessControlException;

    /**
     * Removes all roles from this policy for a certain accreditable.
     * 
     * @param accreditable
     *            An accreditable.
     * @throws AccessControlException
     *             if the accreditable-role pair is not contained.
     */
    void removeRoles(Accreditable accreditable) throws AccessControlException;

    /**
     * Moves a role up the credential tree, giving it higher priority.
     * 
     * @param accreditable
     * @param role
     * @throws AccessControlException
     */
    public void moveRoleUp(Accreditable accreditable, Role role)
            throws AccessControlException;

    /**
     * Moves a role down the credential tree, decreasing its priority.
     * 
     * @param accreditable
     * @param role
     * @throws AccessControlException
     */
    public void moveRoleDown(Accreditable accreditable, Role role)
            throws AccessControlException;

}