/**
 * Copyright (C) 2012-2017 52°North Initiative for Geospatial Open Source
 * Software GmbH
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * If the program is linked with libraries which are licensed under one of
 * the following licenses, the combination of the program with the linked
 * library is not considered a "derivative work" of the program:
 *
 *     - Apache License, version 2.0
 *     - Apache Software License, version 1.0
 *     - GNU Lesser General Public License, version 3
 *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
 *     - Common Development and Distribution License (CDDL), version 1.0
 *
 * Therefore the distribution of the program linked with libraries licensed
 * under the aforementioned licenses, is permitted by the copyright holders
 * if the distribution is compliant with both the GNU General Public
 * License version 2 and the aforementioned licenses.
 *
 * This program 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 General
 * Public License for more details.
 */
package org.n52.sos.util;

import java.io.Serializable;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

/**
 * 
 * Implementation based on {@link HashSet}s and a {@link HashMap}.
 * 
 * @param <K>
 * @param <V>
 * 
 * @author Christian Autermann <c.autermann@52north.org>
 * @since 4.0.0
 * 
 */
public class HashSetMultiMap<K, V> extends AbstractMultiHashMap<K, V, Set<V>> implements SetMultiMap<K, V>,
        Serializable {
    private static final long serialVersionUID = 7628009915817528370L;

    public HashSetMultiMap(Map<? extends K, ? extends Set<V>> m) {
        super(m);
    }

    public HashSetMultiMap(int initialCapacity) {
        super(initialCapacity);
    }

    public HashSetMultiMap(int initialCapacity, float loadFactor) {
        super(initialCapacity, loadFactor);
    }

    public HashSetMultiMap() {
        super();
    }

    @Override
    protected Set<V> newCollection() {
        return new HashSet<V>();
    }
}