/*
 * Copyright 2014 (C) Thomas 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 plugin.lsttokens;

import pcgen.cdom.base.CDOMObject;
import pcgen.cdom.base.Constants;
import pcgen.rules.context.LoadContext;
import pcgen.rules.persistence.token.AbstractTokenWithSeparator;
import pcgen.rules.persistence.token.CDOMPrimaryToken;
import pcgen.rules.persistence.token.ParseResult;

/**
 * This processes the FACT token.
 * 
 * Note that there are no EXPLICIT subtokens in the code. They are all
 * IMPLICITLY created by FACTDEF tokens.
 * 
 * @see plugin.lsttokens.datacontrol.FactDefToken
 * 
 */
public class FactLst extends AbstractTokenWithSeparator<CDOMObject> implements
		CDOMPrimaryToken<CDOMObject>
{
	@Override
	public String getTokenName()
	{
		return "FACT";
	}

	@Override
	protected char separator()
	{
		return '|';
	}

	@Override
	protected ParseResult parseTokenWithSeparator(LoadContext context, CDOMObject cdo,
		String value)
	{
		int pipeLoc = value.indexOf(Constants.PIPE);
		if (pipeLoc == -1)
		{
			return new ParseResult.Fail(getTokenName() + " expecting '|', format is: "
				+ "Fact identification|Fact value ... was: " + value, context);
		}
		else if (pipeLoc != value.lastIndexOf(Constants.PIPE))
		{
			return new ParseResult.Fail(getTokenName()
				+ " expecting only one '|', format is: "
				+ "Fact identification|Fact value ... was: " + value, context);
		}
		String factID = value.substring(0, pipeLoc);
		if (factID.isEmpty())
		{
			return new ParseResult.Fail(getTokenName()
				+ " expecting non-empty identification, "
				+ "format is: Fact identification|Fact value ... was: " + value, context);
		}
		String factStr = value.substring(pipeLoc + 1);
		if (factStr.isEmpty())
		{
			return new ParseResult.Fail(getTokenName() + " expecting non-empty value, "
				+ "format is: Fact identification|Fact value ... was: " + value, context);
		}
		return context.processSubToken(cdo, getTokenName(), factID, factStr);
	}

	@Override
	public String[] unparse(LoadContext context, CDOMObject cdo)
	{
		return context.unparseSubtoken(cdo, getTokenName());
	}

	@Override
	public Class<CDOMObject> getTokenClass()
	{
		return CDOMObject.class;
	}

}