PersistableStrategyConverter.java

/**
 * Copyright (c) 2006-2011 Floggy Open Source Group. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.sourceforge.floggy.persistence.xstream;

import com.thoughtworks.xstream.converters.SingleValueConverter;

import net.sourceforge.floggy.persistence.impl.PersistableMetadata;

/**
 * DOCUMENT ME!
 *
 * @author <a href="mailto:thiago.moreira@floggy.org">Thiago Moreira</a>
 * @version $Revision$
  */
public class PersistableStrategyConverter implements SingleValueConverter {
	public static final String JOINED = "joined";
	public static final String PER_CLASS = "per-class";
	public static final String SINGLE = "single";

	/**
	 * DOCUMENT ME!
	*
	* @param type DOCUMENT ME!
	*
	* @return DOCUMENT ME!
	*/
	public boolean canConvert(Class type) {
		return true;
	}

	/**
	 * DOCUMENT ME!
	*
	* @param str DOCUMENT ME!
	*
	* @return DOCUMENT ME!
	*/
	public Object fromString(String str) {
		if (PersistableStrategyConverter.JOINED.equals(str)) {
			return new Integer(PersistableMetadata.JOINED_STRATEGY);
		} else if (PersistableStrategyConverter.PER_CLASS.equals(str)) {
			return new Integer(PersistableMetadata.PER_CLASS_STRATEGY);
		} else if (PersistableStrategyConverter.SINGLE.equals(str)) {
			return new Integer(PersistableMetadata.SINGLE_STRATEGY);
		}

		throw new IllegalArgumentException(str);
	}

	/**
	 * DOCUMENT ME!
	*
	* @param obj DOCUMENT ME!
	*
	* @return DOCUMENT ME!
	*/
	public String toString(Object obj) {
		if (obj == null) {
			throw new IllegalArgumentException((String) null);
		} else {
			Integer persistableStrategy = (Integer) obj;

			switch (persistableStrategy.intValue()) {
			case PersistableMetadata.JOINED_STRATEGY:
				return PersistableStrategyConverter.JOINED;

			case PersistableMetadata.PER_CLASS_STRATEGY:
				return PersistableStrategyConverter.PER_CLASS;

			case PersistableMetadata.SINGLE_STRATEGY:
				return PersistableStrategyConverter.SINGLE;

			default:
				throw new IllegalArgumentException(persistableStrategy.toString());
			}
		}
	}
}