de.vandermeer.skb.interfaces.strategies.maps.abstractmap.EnumMapStrategy Maven / Gradle / Ivy

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Set of interfaces used by other SKB projects.

There is a newer version: 0.0.2

/* Copyright 2016 Sven van der Meer 
 *
 * 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 de.vandermeer.skb.interfaces.strategies.maps.abstractmap;

import java.util.EnumMap;
import java.util.Map;

import org.apache.commons.lang3.NotImplementedException;

import de.vandermeer.skb.interfaces.strategies.maps.IsAbstractMapStrategy;

/**
 * Strategy for an enum map.
 *
 * @author     Sven van der Meer <[email protected]>
 * @version    v0.0.1 build 170404 (04-Apr-17) for Java 1.8
 * @since      v0.0.1
 */
public interface EnumMapStrategy,V> extends IsAbstractMapStrategy {

	@Override
	default EnumMap get() {
		throw new NotImplementedException("cannot implement get() on enum map w/o enum key, see interface for alternative");
	}

	@Override
	default EnumMap get(Map map){
		return new EnumMap<>(map);
	}

	/**
	 * Returns a new enum map for given key type.
	 * @param keyType key type
	 * @return new enum map
	 */
	default EnumMap get(Class keyType) {
		return new EnumMap<>(keyType);
	}

	/**
	 * Creates a new hash map strategy.
	 * @param  type of the keys in the map
	 * @param  type of the values in the map
	 * @return hash map strategy
	 */
	static ,V> EnumMapStrategy create(){
		return new EnumMapStrategy() {};
	}
}