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 io.jafka.consumer;
  
  import com.fasterxml.jackson.core.type.TypeReference;
  import com.fasterxml.jackson.databind.ObjectMapper;
  
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  
  
  /**
   * @author adyliu (imxylz@gmail.com)
   * @since 1.0
   */
  public class TopicCount {
  
      private final String consumerIdString;
  
      private final Map<String, Integer> topicCountMap;
  
      private static final ObjectMapper mapper = new ObjectMapper();
  
      /**
       * @param consumerIdString groupid-consumerid
       * @param topicCountMap map: topic-&gt;threadCount
       */
      public TopicCount(String consumerIdString, Map<String, Integer> topicCountMap) {
          this.consumerIdString = consumerIdString;
          this.topicCountMap = topicCountMap;
      }
      /**
       * 
       * @return topic-&gt;(consumerIdString-0,consumerIdString-1..)
       */
      public Map<String, Set<String>> getConsumerThreadIdsPerTopic() {
          Map<String, Set<String>> consumerThreadIdsPerTopicMap = new HashMap<String, Set<String>>();
          for (Map.Entry<String, Integer> e : topicCountMap.entrySet()) {
              Set<String> consumerSet = new HashSet<String>();
              final int nCounsumers = e.getValue();
              for (int i = 0; i < nCounsumers; i++) {
                  consumerSet.add(consumerIdString + "-" + i);
              }
              consumerThreadIdsPerTopicMap.put(e.getKey(), consumerSet);
          }
          return consumerThreadIdsPerTopicMap;
      }
  
      @Override
      public int hashCode() {
          final int prime = 31;
          int result = 1;
          result = prime * result + ((consumerIdString == null) ? 0 : consumerIdString.hashCode());
          result = prime * result + ((topicCountMap == null) ? 0 : topicCountMap.hashCode());
          return result;
      }
  
      @Override
      public boolean equals(Object obj) {
          if (this == obj) return true;
          if (obj == null) return false;
          if (getClass() != obj.getClass()) return false;
          TopicCount other = (TopicCount) obj;
          if (consumerIdString == null) {
              if (other.consumerIdString != null) return false;
          } else if (!consumerIdString.equals(other.consumerIdString)) return false;
          if (topicCountMap == null) {
              if (other.topicCountMap != null) return false;
          } else if (!topicCountMap.equals(other.topicCountMap)) return false;
          return true;
      }
      /**
       * topic-&gt;count map
       * @return json map
       */
      public String toJsonString() {
          try {
              return mapper.writeValueAsString(topicCountMap);
          } catch (Exception e) {
              throw new RuntimeException(e);
          }
      }
  
      @Override
      public String toString() {
          return "TopicCount [consumerIdString=" + consumerIdString + ", topicCountMap=" + topicCountMap + "]";
      }
  
      public static TopicCount parse(String consumerIdString, String jsonString) {
          try {
              Map<String, Integer> topicCountMap = mapper.readValue(jsonString, new TypeReference<Map<String, Integer>>() {});
              return new TopicCount(consumerIdString, topicCountMap);
          } catch (Exception e) {
              throw new IllegalArgumentException("error parse consumer json string " + jsonString, e);
          }
      }
  
  }
  