/*
 * Copyright (c) 2008 Tom Parker <thpr@users.sourceforge.net>
 * 
 * This program 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 program 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */
package plugin.lsttokens.equipment;

import java.math.BigDecimal;

import pcgen.cdom.enumeration.ObjectKey;
import pcgen.core.Equipment;
import pcgen.rules.context.LoadContext;
import pcgen.rules.persistence.token.AbstractNonEmptyToken;
import pcgen.rules.persistence.token.CDOMPrimaryToken;
import pcgen.rules.persistence.token.ParseResult;

/**
 * Deals with WT token
 */
public class WtToken extends AbstractNonEmptyToken<Equipment> implements
		CDOMPrimaryToken<Equipment>
{

	/**
	 * Get token name
	 * 
	 * @return token name
	 */
	@Override
	public String getTokenName()
	{
		return "WT";
	}

	@Override
	protected ParseResult parseNonEmptyToken(LoadContext context, Equipment eq, String value)
	{
		try
		{
			BigDecimal weight = new BigDecimal(value);
			if (weight.compareTo(BigDecimal.ZERO) < 0)
			{
				return new ParseResult.Fail(getTokenName()
						+ " was expecting a decimal value >= 0 : " + value, context);
			}
			context.getObjectContext().put(eq, ObjectKey.WEIGHT, weight);
			return ParseResult.SUCCESS;
		}
		catch (NumberFormatException nfe)
		{
			return new ParseResult.Fail("Expected a Double for "
					+ getTokenName() + ": " + value, context);
		}
	}

	@Override
	public String[] unparse(LoadContext context, Equipment eq)
	{
		BigDecimal weight = context.getObjectContext().getObject(eq,
				ObjectKey.WEIGHT);
		if (weight == null)
		{
			return null;
		}
		if (weight.compareTo(BigDecimal.ZERO) < 0)
		{
			context.addWriteMessage(getTokenName()
					+ " was expecting a decimal value >= 0 : " + weight);
			return null;
		}
		return new String[] { weight.toString() };
	}

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