net.projectmonkey.object.mapper.util.MapUtil Maven / Gradle / Ivy

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Object mapping implementation written as an alternative to modelmapper which is able to support inheritance, handles flattening / expanding in a precise way, and is extensible / configurable

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package net.projectmonkey.object.mapper.util;

/*
 *
 *  * Copyright 2012 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.
 *
 */

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * @author Andy Moody
 */
public class MapUtil
{

	public static  void addToMap(Map> map, S key, T value)
	{
		initValueForKey(map, key);
		map.get(key).add(value);
	}

	public static  void addAllToMap(Map> map, S key, List value)
	{
		initValueForKey(map, key);
		map.get(key).addAll(value);
	}

	private static  void initValueForKey(final Map> map, final S key)
	{
		if(!map.containsKey(key))
		{
			map.put(key, new ArrayList());
		}
	}

	public static boolean hasElements(final Map map)
	{
		return map != null && !map.isEmpty();
	}
}