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.common.serialization;
  
  import org.apache.kafka.common.errors.SerializationException;
  
  import java.nio.charset.Charset;
  import java.nio.charset.IllegalCharsetNameException;
  import java.nio.charset.StandardCharsets;
  import java.nio.charset.UnsupportedCharsetException;
  import java.util.Map;
  
  /**
   *  String encoding defaults to UTF8 and can be customized by setting the property key.serializer.encoding,
   *  value.serializer.encoding or serializer.encoding. The first two take precedence over the last.
   */
  public class StringSerializer implements Serializer<String> {
      private Charset encoding = StandardCharsets.UTF_8;
  
      @Override
      public void configure(Map<String, ?> configs, boolean isKey) {
          String propertyName = isKey ? "key.serializer.encoding" : "value.serializer.encoding";
          Object encodingValue = configs.get(propertyName);
          if (encodingValue == null)
              encodingValue = configs.get("serializer.encoding");
          if (encodingValue instanceof String) {
              String encodingName = (String) encodingValue;
              try {
                  encoding = Charset.forName(encodingName);
              } catch (UnsupportedCharsetException | IllegalCharsetNameException e) {
                  throw new SerializationException("Unsupported encoding " + encodingName, e);
              }
          }
      }
  
      @Override
      public byte[] serialize(String topic, String data) {
          if (data == null)
              return null;
          else
              return data.getBytes(encoding);
      }
  }