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.flink.streaming.connectors.redis.common.hanlder;
  
  import org.apache.flink.streaming.connectors.redis.common.mapper.RedisMapper;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.lang.reflect.Constructor;
  import java.util.Map;
  
  import static org.apache.flink.streaming.connectors.redis.descriptor.RedisValidator.REDIS_KEY_TTL;
  
  /**
   * handler for create redis mapper.
   */
  public interface RedisMapperHandler extends RedisHandler {
  
      Logger LOGGER = LoggerFactory.getLogger(RedisMapperHandler.class);
  
      /**
       * create a correct redis mapper use properties.
       * @param properties to create redis mapper.
       * @return redis mapper.
       */
      default RedisMapper createRedisMapper(Map<String, String> properties) {
          String ttl = properties.get(REDIS_KEY_TTL);
          try {
              Class redisMapper = Class.forName(this.getClass().getCanonicalName());
  
              if (ttl == null) {
                  return (RedisMapper) redisMapper.newInstance();
              }
              Constructor c = redisMapper.getConstructor(Integer.class);
              return (RedisMapper) c.newInstance(Integer.parseInt(ttl));
          } catch (Exception e) {
              LOGGER.error("create redis mapper failed", e);
              throw new RuntimeException(e);
          }
      }
  
  }
  