SourceMigration.java

/*
 * SourceMigration.java
 * Copyright 2013 (C) James Dempsey <jdempsey@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
 *
 * Created on 01/06/2013
 *
 * $Id$
 */
package pcgen.io.migration;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import pcgen.core.system.MigrationRule;
import pcgen.core.system.MigrationRule.ObjectType;

/**
 * SourceMigration translates old source keys into their current values. This is 
 * used to allow clean loading of older characters which were saved with source 
 * keys that have now been changed in the data.
 * 
 * 
 * @author James Dempsey <jdempsey@users.sourceforge.net>
 */
public final class SourceMigration
{

	private static Map<int[], List<MigrationRule>> sourceChangesForVer = new HashMap<>();

	/**
	 * Find the new source key to replace the provided one.
	 * 
	 * @param sourceKey The original source key as found in the character file.
	 * @param pcgVer The version of PCGen in which the character was created.
	 * @return The new source key, or the passed in one if it has not changed.
	 */
	public static String getNewSourceKey(String sourceKey, int[] pcgVer, String gameModeName)
	{
		List<MigrationRule> sourceChangeList = sourceChangesForVer.get(pcgVer);
		if (sourceChangeList == null)
		{
			sourceChangeList =
					MigrationUtils.getChangeList(pcgVer, gameModeName,
						ObjectType.SOURCE);
			sourceChangesForVer.put(pcgVer, sourceChangeList);
		}

		for (MigrationRule rule : sourceChangeList)
		{
			if (rule.getOldKey().equalsIgnoreCase(sourceKey))
			{
				return rule.getNewKey();
			}
		}
		return sourceKey;
	}
}