content: /*
   * Copyright 2016 HuntBugs contributors
   * 
   * 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 one.util.huntbugs.util;
  
  import java.util.Collections;
  import java.util.Map;
  import java.util.Map.Entry;
  
  /**
   * @author lan
   *
   */
  public class Maps {
  
      public static <K, V> Map<K, V> compactify(Map<K, V> map) {
          if (map.isEmpty())
              return Collections.emptyMap();
          if (map.size() == 1) {
              Entry<K, V> entry = map.entrySet().iterator().next();
              return Collections.singletonMap(entry.getKey(), entry.getValue());
          }
          return map;
      }
  
  }
  