/*
 * Copyright 2010 (C) Tom Parker <thpr@users.sourceforge.net>
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package pcgen.persistence.lst;

import java.net.URI;
import java.util.StringTokenizer;

import pcgen.cdom.base.Loadable;
import pcgen.persistence.PersistenceLayerException;
import pcgen.persistence.SystemLoader;
import pcgen.rules.context.LoadContext;

public class SimpleLoader<T extends Loadable> extends LstLineFileLoader
{
	private final Class<T> loadClass;

	public SimpleLoader(Class<T> cl)
	{
		if (cl == null)
		{
			throw new IllegalArgumentException("Loaded Class cannot be null");
		}
		loadClass = cl;
	}

	@Override
	public void parseLine(LoadContext context, String lstLine, URI sourceURI)
			throws PersistenceLayerException
	{
		StringTokenizer colToken = new StringTokenizer(lstLine,
				SystemLoader.TAB_DELIM);
		String firstToken = colToken.nextToken().trim();
		Loadable loadable = getLoadable(context, firstToken.intern(), sourceURI);
		if (loadable == null)
		{
			return;
		}

		while (colToken.hasMoreTokens())
		{
			LstUtils.processToken(context, loadable, sourceURI, colToken.nextToken());
		}
	}

	protected T getLoadable(LoadContext context, String firstToken,
			URI sourceURI) throws PersistenceLayerException
	{
		String name = processFirstToken(context, firstToken);
		if (name == null)
		{
			return null;
		}
		T loadable = context.getReferenceContext().constructCDOMObject(loadClass, name.intern());
		loadable.setSourceURI(sourceURI);
		return loadable;
	}

	protected String processFirstToken(LoadContext context, String token)
	{
		return token;
	}

	public Class<T> getLoadClass()
	{
		return loadClass;
	}
}