ModelMapper.java example

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/*
 * Copyright 2009-2011 the original author or authors.
 *
 * 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 org.jdal.web.table;

import java.util.Collection;

/**
 * Interface to map models to/from VOs for serialization 
 * to json strings.
 * 
 * @author Jose Luis Martin - (jlm@joseluismartin.info)
 */
public interface ModelMapper {
	
	/**
	 * Maps model to view model
	 * @param obj to convert to view model
	 * @return view model
	 */
	Object fromModel(Object obj);
	
	/**
	 * maps view model to model
	 * @param obj voew model to convert to model
	 * @return model
	 */
	Object toModel(Object obj);
	
	/** 
	 * Same from ViewModel,  but with collections
	 * @param collection the collection to convert
	 * @return converted collection
	 */
	Collection<?> fromModel(Collection<?> collection);
	
	/**
	 * Same toViewModel, but with collections
	 * @param collection the collection to convert
	 * @return converted collection
	 */
	Collection<?> toModel(Collection<?> collection);

}