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.converters;
  
  import org.apache.kafka.common.config.ConfigDef;
  import org.apache.kafka.common.errors.SerializationException;
  import org.apache.kafka.common.serialization.BooleanDeserializer;
  import org.apache.kafka.common.serialization.BooleanSerializer;
  import org.apache.kafka.common.utils.AppInfoParser;
  import org.apache.kafka.common.utils.Utils;
  import org.apache.kafka.connect.components.Versioned;
  import org.apache.kafka.connect.data.Schema;
  import org.apache.kafka.connect.data.Schema.Type;
  import org.apache.kafka.connect.data.SchemaAndValue;
  import org.apache.kafka.connect.errors.DataException;
  import org.apache.kafka.connect.storage.Converter;
  import org.apache.kafka.connect.storage.ConverterConfig;
  import org.apache.kafka.connect.storage.ConverterType;
  import org.apache.kafka.connect.storage.HeaderConverter;
  
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * {@link Converter} and {@link HeaderConverter} implementation that supports serializing to and
   * deserializing from Boolean values.
   * <p>
   * When converting from bytes to Kafka Connect format, the converter will always return an optional
   * BOOLEAN schema.
   */
  public class BooleanConverter implements Converter, HeaderConverter, Versioned {
  
      private final BooleanSerializer serializer = new BooleanSerializer();
      private final BooleanDeserializer deserializer = new BooleanDeserializer();
  
      @Override
      public ConfigDef config() {
          return BooleanConverterConfig.configDef();
      }
  
      @Override
      public void configure(Map<String, ?> configs) {
          BooleanConverterConfig conf = new BooleanConverterConfig(configs);
          boolean isKey = conf.type() == ConverterType.KEY;
          serializer.configure(configs, isKey);
          deserializer.configure(configs, isKey);
      }
  
      @Override
      public void configure(Map<String, ?> configs, boolean isKey) {
          Map<String, Object> conf = new HashMap<>(configs);
          conf.put(ConverterConfig.TYPE_CONFIG,
              isKey ? ConverterType.KEY.getName() : ConverterType.VALUE.getName());
          configure(conf);
      }
  
      @Override
      public byte[] fromConnectData(String topic, Schema schema, Object value) {
          if (schema != null && schema.type() != Type.BOOLEAN)
              throw new DataException("Invalid schema type for BooleanConverter: " + schema.type().toString());
  
          try {
              return serializer.serialize(topic, (Boolean) value);
          } catch (ClassCastException e) {
              throw new DataException("BooleanConverter is not compatible with objects of type " + value.getClass());
          }
      }
  
      @Override
      public SchemaAndValue toConnectData(String topic, byte[] value) {
          try {
              return new SchemaAndValue(Schema.OPTIONAL_BOOLEAN_SCHEMA,
                  deserializer.deserialize(topic, value));
          } catch (SerializationException e) {
              throw new DataException("Failed to deserialize boolean: ", e);
          }
      }
  
      @Override
      public byte[] fromConnectHeader(String topic, String headerKey, Schema schema, Object value) {
          return fromConnectData(topic, schema, value);
      }
  
      @Override
      public SchemaAndValue toConnectHeader(String topic, String headerKey, byte[] value) {
          return toConnectData(topic, value);
      }
  
      @Override
      public void close() {
          Utils.closeQuietly(this.serializer, "boolean converter serializer");
          Utils.closeQuietly(this.deserializer, "boolean converter deserializer");
      }
  
      @Override
      public String version() {
          return AppInfoParser.getVersion();
      }
  }
  