MapUtils.java

/*
 * Copyright 2015 Petr Bouda
 *
 * 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 org.joyrest.utils;

import java.util.Map;

import static java.util.stream.Collectors.toMap;

public class MapUtils {

    public static <K, V> Map<K, V> createOneDimMap(Map<K, V[]> multiValueMap) {
        return multiValueMap.entrySet().stream()
            .collect(toMap(Map.Entry::getKey, entry -> entry.getValue()[0]));
    }

}