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package org.apache.fulcrum.security;
/*
* 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.
*/
import java.io.Serializable;
import org.apache.fulcrum.security.acl.AccessControlList;
import org.apache.fulcrum.security.entity.User;
import org.apache.fulcrum.security.util.DataBackendException;
import org.apache.fulcrum.security.util.EntityExistsException;
import org.apache.fulcrum.security.util.PasswordMismatchException;
import org.apache.fulcrum.security.util.UnknownEntityException;
import org.apache.fulcrum.security.util.UserSet;
/**
* An UserManager performs {@link org.apache.fulcrum.security.entity.User}
* objects related tasks on behalf of the
* {@link org.apache.fulcrum.security.BaseSecurityService}.
*
* The responsibilities of this class include loading data of an user from the
* storage and putting them into the
* {@link org.apache.fulcrum.security.entity.User} objects, saving those data to
* the permanent storage, and authenticating users.
*
* @author Eric Pugh
* @author Rafal Krzewski
* @version $Id: UserManager.java 1845858 2018-11-05 21:14:02Z painter $
*/
public interface UserManager extends Serializable
{
/** Avalon role - used to id the component within the manager */
String ROLE = UserManager.class.getName();
/**
* Construct a blank User object.
*
* This method calls getUserClass, and then creates a new object using the
* default constructor.
*
* @return an object implementing User interface.
* @throws DataBackendException
* if the object could not be instantiated.
*/
T getUserInstance() throws DataBackendException;
/**
* Construct a blank User object.
*
* This method calls getUserClass, and then creates a new object using the
* default constructor.
*
* @param userName
* The name of the user.
*
* @return an object implementing User interface.
* @throws DataBackendException
* if the object could not be instantiated.
*/
T getUserInstance(String userName) throws DataBackendException;
/**
* Determines if the User exists in the security system.
*
* @param user
* a User value
* @return true if the user exists in the system, false otherwise
* @throws DataBackendException
* when more than one user with the same name exists.
*/
boolean checkExists(User user) throws DataBackendException;
/**
* Check whether a specified user's account exists.
*
* The login name is used for looking up the account.
*
* @param userName
* The name of the user to be checked.
* @return true if the specified account exists
* @throws DataBackendException
* if there was an error accessing the data backend.
*/
boolean checkExists(String userName) throws DataBackendException;
/**
* Retrieve a user from persistent storage using username as the key.
*
* @param username
* the name of the user.
* @return an User object.
* @throws UnknownEntityException
* if the user's record does not exist in the database.
* @throws DataBackendException
* if there is a problem accessing the storage.
*/
T getUser(String username) throws UnknownEntityException, DataBackendException;
/**
* Retrieve a user from persistent storage using the id as the key.
*
* @param id
* the id of the user.
* @return an User object.
* @throws UnknownEntityException
* if the user's record does not exist in the database.
* @throws DataBackendException
* if there is a problem accessing the storage.
*/
T getUserById(Object id) throws UnknownEntityException, DataBackendException;
/**
* Retrieve a user from persistent storage using username as the key, and
* authenticate the user. The implementation may chose to authenticate to
* the server as the user whose data is being retrieved.
*
* @param username
* the name of the user.
* @param password
* the user supplied password.
* @return an User object.
* @throws PasswordMismatchException
* if the supplied password was incorrect.
* @throws UnknownEntityException
* if the user's record does not exist in the database.
* @throws DataBackendException
* if there is a problem accessing the storage.
*/
T getUser(String username, String password) throws PasswordMismatchException, UnknownEntityException, DataBackendException;
/**
* Retrieves all users defined in the system.
*
* @return the names of all users defined in the system.
* @throws DataBackendException
* if there was an error accessing the data backend.
*/
UserSet getAllUsers() throws DataBackendException;
/**
* Saves User's data in the permanent storage. The user account is required
* to exist in the storage.
*
* @param user
* the user object to save
* @throws UnknownEntityException
* if the user's account does not exist in the database.
* @throws DataBackendException
* if there is a problem accessing the storage.
*/
void saveUser(User user) throws UnknownEntityException, DataBackendException;
/**
* Authenticate an User with the specified password. If authentication is
* successful the method returns nothing. If there are any problems,
* exception was thrown.
*
* @param user
* an User object to authenticate.
* @param password
* the user supplied password.
* @throws PasswordMismatchException
* if the supplied password was incorrect.
* @throws UnknownEntityException
* if the user's record does not exist in the database.
* @throws DataBackendException
* if there is a problem accessing the storage.
*/
void authenticate(User user, String password) throws PasswordMismatchException, UnknownEntityException, DataBackendException;
/**
* Creates new user account with specified attributes.
*
* @param user
* the object describing account to be created.
* @param password
* The password to use for the object creation
*
* @return User the user added
*
* @throws DataBackendException
* if there was an error accessing the data backend.
* @throws EntityExistsException
* if the user account already exists.
*/
T addUser(T user, String password) throws EntityExistsException, DataBackendException;
/**
* Removes an user account from the system.
*
* @param user
* the object describing the account to be removed.
* @throws DataBackendException
* if there was an error accessing the data backend.
* @throws UnknownEntityException
* if the user account is not present.
*/
void removeUser(User user) throws UnknownEntityException, DataBackendException;
/**
* Change the password for an User.
*
* @param user
* an User to change password for.
* @param oldPassword
* the current password suplied by the user.
* @param newPassword
* the current password requested by the user.
* @throws PasswordMismatchException
* if the supplied password was incorrect.
* @throws UnknownEntityException
* if the user's record does not exist in the database.
* @throws DataBackendException
* if there is a problem accessing the storage.
*/
void changePassword(User user, String oldPassword, String newPassword) throws PasswordMismatchException, UnknownEntityException,
DataBackendException;
/**
* Forcibly sets new password for an User.
*
* This is supposed by the administrator to change the forgotten or
* compromised passwords. Certain implementatations of this feature would
* require administrative level access to the authenticating server /
* program.
*
* @param user
* an User to change password for.
* @param password
* the new password.
* @throws UnknownEntityException
* if the user's record does not exist in the database.
* @throws DataBackendException
* if there is a problem accessing the storage.
*/
void forcePassword(User user, String password) throws UnknownEntityException, DataBackendException;
/**
* Return a Class object representing the system's chosen implementation of
* of ACL interface.
*
* @param user the user
* @return systems's chosen implementation of ACL interface.
* @throws UnknownEntityException
* if the implementation of ACL interface could not be
* determined, or does not exist.
*/
T getACL(User user) throws UnknownEntityException;
}
