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.mqtt.config;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.function.Function;
  
  import io.aklivity.zilla.runtime.engine.config.ConfigBuilder;
  
  public class MqttSubscribeConfigBuilder<T> extends ConfigBuilder<T, MqttSubscribeConfigBuilder<T>>
  {
      private final Function<MqttSubscribeConfig, T> mapper;
  
      private String topic;
  
      private List<MqttTopicParamConfig> params;
  
      MqttSubscribeConfigBuilder(
          Function<MqttSubscribeConfig, T> mapper)
      {
          this.mapper = mapper;
      }
  
      @Override
      @SuppressWarnings("unchecked")
      protected Class<MqttSubscribeConfigBuilder<T>> thisType()
      {
          return (Class<MqttSubscribeConfigBuilder<T>>) getClass();
      }
  
      public MqttSubscribeConfigBuilder<T> topic(
          String topic)
      {
          this.topic = topic;
          return this;
      }
  
      public MqttSubscribeConfigBuilder<T> param(
          MqttTopicParamConfig param)
      {
          if (this.params == null)
          {
              this.params = new ArrayList<>();
          }
          this.params.add(param);
          return this;
      }
  
      public MqttTopicParamConfigBuilder<MqttSubscribeConfigBuilder<T>> param()
      {
          return new MqttTopicParamConfigBuilder<>(this::param);
      }
  
      @Override
      public T build()
      {
          return mapper.apply(new MqttSubscribeConfig(topic, params));
      }
  }
  