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/**
 * 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.lifecycle.instance.predefined.server;

import java.util.Arrays;

import com.c2kernel.common.CannotManageException;
import com.c2kernel.common.InvalidDataException;
import com.c2kernel.common.ObjectCannotBeUpdated;
import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.lifecycle.instance.predefined.PredefinedStep;
import com.c2kernel.lookup.AgentPath;
import com.c2kernel.lookup.ItemPath;
import com.c2kernel.lookup.LookupManager;
import com.c2kernel.lookup.RolePath;
import com.c2kernel.process.Gateway;
import com.c2kernel.utils.Logger;

public class RemoveRole extends PredefinedStep
{
    public RemoveRole()
    {
        super();
    }

	//requestdata is xmlstring
    @Override
	protected String runActivityLogic(AgentPath agent, ItemPath item,
			int transitionID, String requestData) throws InvalidDataException {
    	
    	String[] params = getDataList(requestData);
    	if (Logger.doLog(3)) Logger.msg(3, "AddC2KObject: called by "+agent+" on "+item+" with parameters "+Arrays.toString(params));
    	LookupManager lookup;
		try {
			lookup = Gateway.getLookupManager();
		} catch (CannotManageException e) {
			throw new InvalidDataException(e.getMessage(), "");
		}
		
       	RolePath thisRole; AgentPath[] agents;
		try {
			thisRole = lookup.getRolePath(params[0]);
			agents = Gateway.getLookup().getAgents(thisRole);
		} catch (ObjectNotFoundException e) {
			throw new InvalidDataException("Role "+params[0]+" not found.", "");
		}
       	
       	if (agents.length > 0)
       		throw new InvalidDataException("Cannot remove role. "+agents.length+" agents still hold it.", "");
       	try {
			lookup.delete(thisRole);
		} catch (ObjectCannotBeUpdated e) {
			Logger.error(e);
			throw new InvalidDataException("Role "+params[0]+" could not be removed.", "");
		}

        return requestData;

    }
}