/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2017-2020 Yegor Bugayenko
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.cactoos.map;

import java.util.Map;
import java.util.stream.Collectors;
import org.cactoos.list.ListOf;

/**
 * This class can be used to merge a few {@link Map}.
 * Repeatable keys will be overridden by next ones.
 *
 * @param <K> Key type
 * @param <V> Value type
 * @since 1.0
 */
public final class Merged<K, V> extends MapEnvelope<K, V> {
    /**
     * Ctor.
     * @param maps Maps to merge.
     */
    @SafeVarargs
    public Merged(final Map<K, V>... maps) {
        super(() -> new MapOf<>(
            new ListOf<>(maps)
                .stream()
                .flatMap(map -> map.entrySet().stream())
                .collect(Collectors.toList())
            )
        );
    }
}