/**
 * 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 org.cristalise.kernel.lifecycle.instance.predefined;

import java.util.Arrays;

import org.cristalise.kernel.common.InvalidDataException;
import org.cristalise.kernel.common.ObjectCannotBeUpdated;
import org.cristalise.kernel.common.ObjectNotFoundException;
import org.cristalise.kernel.common.PersistencyException;
import org.cristalise.kernel.lookup.AgentPath;
import org.cristalise.kernel.lookup.ItemPath;
import org.cristalise.kernel.persistency.ClusterStorage;
import org.cristalise.kernel.process.Gateway;
import org.cristalise.kernel.property.Property;
import org.cristalise.kernel.utils.Logger;


/**************************************************************************
 *
 * @author $Author: abranson $ $Date: 2004/10/21 08:02:19 $
 * @version $Revision: 1.3 $
 **************************************************************************/
public class WriteProperty extends PredefinedStep
{
	/**************************************************************************
    * Constructor for Castror
    **************************************************************************/
    public WriteProperty()
    {
        super();
    }

	//requestdata is xmlstring
    @Override
	protected String runActivityLogic(AgentPath agent, ItemPath item,
			int transitionID, String requestData) throws InvalidDataException, ObjectCannotBeUpdated, ObjectNotFoundException, PersistencyException {

        String[] params = getDataList(requestData);
        if (Logger.doLog(3)) Logger.msg(3, "WriteProperty: called by "+agent+" on "+item+" with parameters "+Arrays.toString(params));

        if (params.length != 2)
            throw new InvalidDataException("WriteProperty: invalid parameters "+Arrays.toString(params));
        
        String name = params[0];
        String newValue = params[1];
        
        Property prop;
        
        try {
			prop = (Property)Gateway.getStorage().get(item, ClusterStorage.PROPERTY+"/"+name, null);
			if (!prop.isMutable() && !newValue.equals(prop.getValue()))
				throw new ObjectCannotBeUpdated("WriteProperty: Property '"+name+"' is not mutable.");
			prop.setValue(newValue);
			Gateway.getStorage().put(item, prop, null);
		} catch (ObjectNotFoundException e) {
			throw new ObjectNotFoundException("WriteProperty: Property '"+name+"' not found.");
		} 

        return requestData;
    }
}