/*
    *    Copyright 2009-2021 the original author or authors.
    *
    *    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.apache.ibatis.cache;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.ibatis.cache.decorators.TransactionalCache;
  import org.apache.ibatis.util.MapUtil;
  
  /**
   * @author Clinton Begin
   */
  public class TransactionalCacheManager {
  
    private final Map<Cache, TransactionalCache> transactionalCaches = new HashMap<>();
  
    public void clear(Cache cache) {
      getTransactionalCache(cache).clear();
    }
  
    public Object getObject(Cache cache, CacheKey key) {
      return getTransactionalCache(cache).getObject(key);
    }
  
    public void putObject(Cache cache, CacheKey key, Object value) {
      getTransactionalCache(cache).putObject(key, value);
    }
  
    public void commit() {
      for (TransactionalCache txCache : transactionalCaches.values()) {
        txCache.commit();
      }
    }
  
    public void rollback() {
      for (TransactionalCache txCache : transactionalCaches.values()) {
        txCache.rollback();
      }
    }
  
    private TransactionalCache getTransactionalCache(Cache cache) {
      return MapUtil.computeIfAbsent(transactionalCaches, cache, TransactionalCache::new);
    }
  
  }