/**
 * This file is part of the CRISTAL-iSE kernel.
 * Copyright (c) 2001-2014 The CRISTAL Consortium. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 3 of the License, or (at
 * your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; with out even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * http://www.fsf.org/licensing/licenses/lgpl.html
 */
package com.c2kernel.lookup;

import java.security.NoSuchAlgorithmException;

import com.c2kernel.common.ObjectAlreadyExistsException;
import com.c2kernel.common.ObjectCannotBeUpdated;
import com.c2kernel.common.ObjectNotFoundException;

/**
 * The LookupManager interface contains all of the directory modifying methods
 * of the Lookup. This allows read-only Lookup implementations. Server processes
 * will attempt to cast their Lookups into LookupManagers, and fail to start up
 * if this is not possible.
 *
 */
public interface LookupManager extends Lookup {
	
	/**
	 * Called when a server starts up. The Lookup implementation should ensure 
	 * that the initial structure of its directory is valid, and create it on 
	 * first boot.
	 * 
	 * @throws ObjectNotFoundException When initialization data is not found
	 */
	public void initializeDirectory() throws ObjectNotFoundException;
	
	// Path management
	
	/**
	 * Register a new a Path in the directory.
	 * 
	 * @param newPath The path to add
	 * @throws ObjectCannotBeUpdated When there is an error writing to the 
	 * directory
	 * @throws ObjectAlreadyExistsException When the Path has already been registered
	 */
	public void add(Path newPath) throws ObjectCannotBeUpdated, ObjectAlreadyExistsException;

	/**
	 * Remove a Path from the directory.
	 * 
	 * @param path The path to remove
	 * @throws ObjectCannotBeUpdated When an error occurs writing to the directory
	 */
	public void delete(Path path) throws ObjectCannotBeUpdated;
	
	// Role and agent management
	
	/**
	 * Creates a new Role. Called by the server predefined step 'CreateNewRole'
	 * 
	 * @param role The new role path
	 * @return
	 * @throws ObjectAlreadyExistsException 
	 * @throws ObjectCannotBeUpdated
	 */
	public RolePath createRole(RolePath role) throws ObjectAlreadyExistsException, ObjectCannotBeUpdated;

	/**
	 * Adds the given Agent to the given Role, if they both exist.
	 * 
	 * @param agent 
	 * @param rolePath
	 * @throws ObjectCannotBeUpdated
	 * @throws ObjectNotFoundException
	 */
	public void addRole(AgentPath agent, RolePath rolePath) throws ObjectCannotBeUpdated, ObjectNotFoundException;

	/**
	 * Remove the given Agent from the given Role. Does not delete the Role.
	 * 
	 * @param agent
	 * @param role
	 * @throws ObjectCannotBeUpdated
	 * @throws ObjectNotFoundException
	 */
	public void removeRole(AgentPath agent, RolePath role) throws ObjectCannotBeUpdated, ObjectNotFoundException;

	/**
	 * Set an Agent's password
	 * 
	 * @param agent The Agent
	 * @param newPassword The Agent's new password
	 * @throws ObjectNotFoundException
	 * @throws ObjectCannotBeUpdated
	 * @throws NoSuchAlgorithmException
	 */
	public void setAgentPassword(AgentPath agent, String newPassword) throws ObjectNotFoundException, ObjectCannotBeUpdated, NoSuchAlgorithmException;
	
	/**
	 * Set the flag specifying whether Activities holding this Role should push
	 * Jobs its Agents.
	 * 
	 * @param role The role to modify
	 * @param hasJobList boolean flag
	 * 
	 * @throws ObjectNotFoundException When the Role doesn't exist
	 * @throws ObjectCannotBeUpdated 
	 */
	public void setHasJobList(RolePath role, boolean hasJobList) throws ObjectNotFoundException, ObjectCannotBeUpdated;


}