/*
    * 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.commons.jcs.jcache.cdi;
  
  import javax.cache.Cache;
  import javax.cache.CacheManager;
  import javax.cache.Caching;
  import javax.cache.annotation.CacheMethodDetails;
  import javax.cache.annotation.CacheResolver;
  import javax.cache.annotation.CacheResolverFactory;
  import javax.cache.annotation.CacheResult;
  import javax.cache.configuration.MutableConfiguration;
  import javax.cache.spi.CachingProvider;
  import java.lang.annotation.Annotation;
  
  public class CacheResolverFactoryImpl implements CacheResolverFactory
  {
      private final CacheManager cacheManager;
      private final CachingProvider provider;
  
      public CacheResolverFactoryImpl()
      {
          provider = Caching.getCachingProvider();
          cacheManager = provider.getCacheManager(provider.getDefaultURI(), provider.getDefaultClassLoader());
      }
  
      @Override
      public CacheResolver getCacheResolver(CacheMethodDetails<? extends Annotation> cacheMethodDetails)
      {
          return findCacheResolver(cacheMethodDetails.getCacheName());
      }
  
      @Override
      public CacheResolver getExceptionCacheResolver(final CacheMethodDetails<CacheResult> cacheMethodDetails)
      {
          final String exceptionCacheName = cacheMethodDetails.getCacheAnnotation().exceptionCacheName();
          if (exceptionCacheName == null || exceptionCacheName.isEmpty())
          {
              throw new IllegalArgumentException("CacheResult.exceptionCacheName() not specified");
          }
          return findCacheResolver(exceptionCacheName);
      }
  
      private CacheResolver findCacheResolver(String exceptionCacheName)
      {
          Cache<?, ?> cache = cacheManager.getCache(exceptionCacheName);
          if (cache == null)
          {
              cache = createCache(exceptionCacheName);
          }
          return new CacheResolverImpl(cache);
      }
  
      private Cache<?, ?> createCache(final String exceptionCacheName)
      {
          cacheManager.createCache(exceptionCacheName, new MutableConfiguration<Object, Object>().setStoreByValue(false));
          return cacheManager.getCache(exceptionCacheName);
      }
  
      public void release()
      {
          cacheManager.close();
          provider.close();
      }
  }