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/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2018 Paul Campbell
 *
 * 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 NONINFRINGEMENT. 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 net.kemitix.mon.tree;

import java.util.List;
import java.util.function.Function;
import java.util.stream.Collectors;

/**
 * Maps a list of Trees.
 *
 * @param  the type of the objects help in the tree
 *
 * @author Paul Campbell ([email protected])
 */
interface TreeMapper {

    /**
     * Map the Trees.
     *
     * @param f the mapping function
     * @param trees the trees to map
     * @param  the type of the resulting Trees
     *
     * @return a List of mapped sub-trees
     */
    public default  List> mapTrees(
            final Function f,
            final List> trees
    ) {
        return trees.stream()
                .map(subTree -> subTree.map(f))
                .collect(Collectors.toList());
    }

}