content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.apache.ambari.server.testutils;
  
  import java.util.Arrays;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.Map;
  
  /**
   * Utilities for collections used in unit tests.
   */
  public class TestCollectionUtils {
  
    /**
     * A simple (but not production quality) way to create mutable hashmaps for unit tests
     * @param firstKey the first key in the map
     * @param firstValue the first value in the map
     * @param others further keys and values
     * @param <K> key type
     * @param <V> value type
     * @return the map
     */
    @SuppressWarnings("unchecked")
    public static <K, V> Map<K, V> map(K firstKey, V firstValue, Object... others) {
      Map<K, V> map = new HashMap<>();
      map.put(firstKey, firstValue);
      Iterator iterator = Arrays.asList(others).iterator();
      while (iterator.hasNext()) {
        map.put((K)iterator.next(), (V)iterator.next());
      }
      return map;
    }
  
  }
  