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.kafka.common.utils;
  
  import java.util.LinkedHashMap;
  import java.util.Map;
  
  /**
   * An ordered map (LinkedHashMap) implementation for which the order is immutable.
   * To accomplish this, all methods of removing mappings are disabled (they are marked
   * deprecated and throw an exception).
   *
   * This class is final to prevent subclasses from violating the desired property.
   *
   * @param <K> The key type
   * @param <V> The value type
   */
  public final class FixedOrderMap<K, V> extends LinkedHashMap<K, V> {
      private static final long serialVersionUID = -6504110858733236170L;
  
      @Deprecated
      @Override
      protected boolean removeEldestEntry(final Map.Entry<K, V> eldest) {
          return false;
      }
  
      @Deprecated
      @Override
      public V remove(final Object key) {
          throw new UnsupportedOperationException("Removing from registeredStores is not allowed");
      }
  
      @Deprecated
      @Override
      public boolean remove(final Object key, final Object value) {
          throw new UnsupportedOperationException("Removing from registeredStores is not allowed");
      }
  
      @Override
      public FixedOrderMap<K, V> clone() {
          throw new UnsupportedOperationException();
      }
  }
  