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.connect.storage;
  
  import org.apache.kafka.common.config.AbstractConfig;
  import org.apache.kafka.common.config.ConfigDef;
  import org.apache.kafka.common.config.ConfigDef.Importance;
  import org.apache.kafka.common.config.ConfigDef.Type;
  
  import java.util.Map;
  
  import static org.apache.kafka.common.config.ConfigDef.ValidString.in;
  
  /**
   * Abstract class that defines the configuration options for {@link Converter} and {@link HeaderConverter} instances.
   */
  public abstract class ConverterConfig extends AbstractConfig {
  
      public static final String TYPE_CONFIG = "converter.type";
      private static final String TYPE_DOC = "How this converter will be used.";
  
      /**
       * Create a new {@link ConfigDef} instance containing the configurations defined by ConverterConfig. This can be called by subclasses.
       *
       * @return the ConfigDef; never null
       */
      public static ConfigDef newConfigDef() {
          return new ConfigDef().define(TYPE_CONFIG, Type.STRING, ConfigDef.NO_DEFAULT_VALUE,
                                        in(ConverterType.KEY.getName(), ConverterType.VALUE.getName(), ConverterType.HEADER.getName()),
                                        Importance.LOW, TYPE_DOC);
      }
  
      protected ConverterConfig(ConfigDef configDef, Map<String, ?> props) {
          super(configDef, props, true);
      }
  
      /**
       * Get the type of converter as defined by the {@link #TYPE_CONFIG} configuration.
       * @return the converter type; never null
       */
      public ConverterType type() {
          return ConverterType.withName(getString(TYPE_CONFIG));
      }
  }
  