/*
 * Copyright 2007 (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.rules.persistence;

import pcgen.cdom.base.CDOMObject;
import pcgen.cdom.base.CDOMReference;
import pcgen.cdom.base.Constants;
import pcgen.cdom.base.Loadable;
import pcgen.cdom.reference.CDOMGroupRef;
import pcgen.cdom.reference.ReferenceManufacturer;
import pcgen.cdom.reference.SelectionCreator;
import pcgen.rules.context.LoadContext;
import pcgen.util.Logging;

public final class TokenUtilities
{

	private TokenUtilities()
	{
		// Can't instantiate utility classes
	}

	public static <T extends Loadable> CDOMReference<T> getTypeOrPrimitive(
			LoadContext context, Class<T> cl, String s)
	{
		return 	getTypeOrPrimitive(context.getReferenceContext().getManufacturer(cl), s);
	}

	public static <T extends CDOMObject> CDOMGroupRef<T> getTypeReference(
			LoadContext context, Class<T> cl, String subStr)
	{
		return getTypeReference(context.getReferenceContext().getManufacturer(cl), subStr);
	}

	public static <T extends Loadable> CDOMReference<T> getTypeOrPrimitive(
			ReferenceManufacturer<T> rm, String s)
	{
		if (s.startsWith(Constants.LST_TYPE_DOT)
				|| s.startsWith(Constants.LST_TYPE_EQUAL))
		{
			return getTypeReference(rm, s.substring(5));
		}
		else if (s.startsWith(Constants.LST_NOT_TYPE_DOT)
				|| s.startsWith(Constants.LST_NOT_TYPE_EQUAL))
		{
			Logging.errorPrint("!TYPE not supported in token, found: " + s);
			return null;
		}
		else
		{
			return rm.getReference(s);
		}
	}

	public static <T extends Loadable> CDOMGroupRef<T> getTypeReference(
			SelectionCreator<T> rm, String s)
	{
		if (s.isEmpty())
		{
			Logging.errorPrint("Type may not be empty in: " + s);
			return null;
		}
		if (s.charAt(0) == '.'
				|| s.charAt(s.length() - 1) == '.')
		{
			Logging.errorPrint("Type may not start or end with . in: " + s);
			return null;
		}
		String[] types = s.split("\\.");
		for (String type : types)
		{
			if (type.isEmpty())
			{
				Logging.errorPrint("Attempt to acquire empty Type in: " + s);
				return null;
			}
		}
		return rm.getTypeReference(types);
	}

	public static <T extends CDOMObject> CDOMReference<T> getReference(
			LoadContext context, Class<T> cl, String tokText)
	{
		CDOMReference<T> lang;
		if (Constants.LST_ALL.equals(tokText))
		{
			lang = context.getReferenceContext().getCDOMAllReference(cl);
		}
		else
		{
			lang = getTypeOrPrimitive(context, cl, tokText);
		}
		return lang;
	}
}