/**
 *
 * Copyright (c) 2014, the Railo Company Ltd. 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 2.1 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; without 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, see <http://www.gnu.org/licenses/>.
 * 
 **/
package lucee.runtime.type.scope.session;

import lucee.commons.io.log.Log;
import lucee.runtime.PageContext;
import lucee.runtime.exp.PageException;
import lucee.runtime.type.Collection;
import lucee.runtime.type.Struct;
import lucee.runtime.type.StructImpl;
import lucee.runtime.type.scope.Session;
import lucee.runtime.type.scope.storage.StorageScopeDatasource;

public class SessionDatasource extends StorageScopeDatasource implements Session {
	
	private SessionDatasource(PageContext pc,String datasourceName, Struct sct) { 
		super(pc,datasourceName,"session",SCOPE_SESSION, sct);
	}

	/**
	 * Constructor of the class, clone existing
	 * @param other
	 */
	private SessionDatasource(StorageScopeDatasource other,boolean deepCopy) {
		super(other,deepCopy);
	}
	
	/**
	 * load an new instance of the client datasource scope
	 * @param datasourceName 
	 * @param appName
	 * @param pc
	 * @param checkExpires 
	 * @return client datasource scope
	 * @throws PageException
	 */
	public static Session getInstance(String datasourceName, PageContext pc,Log log) throws PageException {
			
			Struct _sct = _loadData(pc, datasourceName,"session",SCOPE_SESSION, log,false);
			if(_sct==null) _sct=new StructImpl();
			
		return new SessionDatasource(pc,datasourceName,_sct);
	}
	
	public static Session getInstance(String datasourceName, PageContext pc, Log log,Session defaultValue) {
		try {
			return getInstance(datasourceName, pc,log);
		}
		catch (PageException e) {}
		return defaultValue;
	}
	public static boolean hasInstance(String datasourceName, PageContext pc) {
		try {
			return _loadData(pc, datasourceName,"session",SCOPE_SESSION, null,false)!=null;
		} 
		catch (PageException e) {
			return false;
		}
	}
	

	@Override
	public Collection duplicate(boolean deepCopy) {
    	return new SessionDatasource(this,deepCopy);
	}
}