content: /*
   * Copyright 2021-2024 Aklivity Inc.
   *
   * Aklivity 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 io.aklivity.zilla.runtime.binding.kafka.config;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.function.Function;
  
  import io.aklivity.zilla.runtime.engine.config.ConfigBuilder;
  
  public final class KafkaTopicTransformsConfigBuilder<T> extends ConfigBuilder<T, KafkaTopicTransformsConfigBuilder<T>>
  {
      private final Function<KafkaTopicTransformsConfig, T> mapper;
      private String extractKey;
      private List<KafkaTopicHeaderConfig> extractHeaders;
  
      KafkaTopicTransformsConfigBuilder(
          Function<KafkaTopicTransformsConfig, T> mapper)
      {
          this.mapper = mapper;
          this.extractHeaders = new ArrayList<>();
      }
  
      @Override
      @SuppressWarnings("unchecked")
      protected Class<KafkaTopicTransformsConfigBuilder<T>> thisType()
      {
          return (Class<KafkaTopicTransformsConfigBuilder<T>>) getClass();
      }
  
      public KafkaTopicTransformsConfigBuilder<T> extractKey(
          String extractKey)
      {
          this.extractKey = extractKey;
  
          return this;
      }
  
      public KafkaTopicTransformsConfigBuilder<T> extractHeaders(
          List<KafkaTopicHeaderConfig> extractHeaders)
      {
          if (extractHeaders != null)
          {
              extractHeaders.forEach(this::extractHeader);
          }
          return this;
      }
  
      public KafkaTopicTransformsConfigBuilder<T> extractHeader(
          KafkaTopicHeaderConfig header)
      {
          return extractHeader(header.name, header.path);
      }
  
      public KafkaTopicTransformsConfigBuilder<T> extractHeader(
          String name,
          String path)
      {
          if (this.extractHeaders == null)
          {
              this.extractHeaders = new ArrayList<>();
          }
  
          this.extractHeaders.add(new KafkaTopicHeaderConfig(name, path));
  
          return this;
      }
  
      @Override
      public T build()
      {
          return mapper.apply(new KafkaTopicTransformsConfig(extractKey, extractHeaders));
      }
  }
  