/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.hc.client5.http.impl.cache;
  
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.hc.client5.http.cache.HttpCacheCASOperation;
  import org.apache.hc.client5.http.cache.HttpCacheEntry;
  import org.apache.hc.client5.http.cache.HttpCacheStorage;
  import org.apache.hc.client5.http.cache.ResourceIOException;
  
  class SimpleHttpCacheStorage implements HttpCacheStorage {
  
      public final Map<String,HttpCacheEntry> map;
  
      public SimpleHttpCacheStorage() {
          map = new HashMap<>();
      }
  
      @Override
      public void putEntry(final String key, final HttpCacheEntry entry) throws ResourceIOException {
          map.put(key, entry);
      }
  
      @Override
      public HttpCacheEntry getEntry(final String key) throws ResourceIOException {
          return map.get(key);
      }
  
      @Override
      public void removeEntry(final String key) throws ResourceIOException {
          map.remove(key);
      }
  
      @Override
      public void updateEntry(
              final String key, final HttpCacheCASOperation casOperation) throws ResourceIOException {
          final HttpCacheEntry v1 = map.get(key);
          final HttpCacheEntry v2 = casOperation.execute(v1);
          map.put(key,v2);
      }
  
      @Override
      public Map<String, HttpCacheEntry> getEntries(final Collection<String> keys) throws ResourceIOException {
          final Map<String, HttpCacheEntry> resultMap = new HashMap<>(keys.size());
          for (final String key: keys) {
              final HttpCacheEntry entry = getEntry(key);
              if (entry != null) {
                  resultMap.put(key, entry);
              }
          }
          return resultMap;
      }
  
  }